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CVE-2008-2739 (GCVE-0-2008-2739)
Vulnerability from cvelistv5
- n/a
| URL | Tags | ||||||||||||||||||||||||||||||||||
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var-200809-0320
Vulnerability from variot
The SERVICE.DNS signature engine in the Intrusion Prevention System (IPS) in Cisco IOS 12.3 and 12.4 allows remote attackers to cause a denial of service (device crash or hang) via network traffic that triggers unspecified IPS signatures, a different vulnerability than CVE-2008-1447. A successful exploit will cause an affected device to crash, denying service to legitimate users.
Cisco has released free software updates that address this vulnerability. There is a workaround for this vulnerability.
Note: This vulnerability is not related in any way to CVE-2008-1447 - Cache poisoning attacks. Cisco Systems has published a Cisco Security Advisory for that vulnerability, which can be found at http://www.cisco.com/en/US/products/products_security_advisory09186a00809c2168.shtml
This advisory is posted at http://www.cisco.com/warp/public/707/cisco-sa-20080924-iosips.shtml
Note: The September 24, 2008 IOS Advisory bundled publication includes twelve Security Advisories. Eleven of the advisories address vulnerabilities in Cisco's IOS software, and one advisory addresses vulnerabilities in Cisco Unified Communications Manager. Each Advisory lists the releases that correct the vulnerability described in the Advisory. Please reference the following software table to find a release that fixes all published IOS software Advisories as of September 24th, 2008:
http://www.cisco.com/warp/public/707/cisco-sa-20080924-bundle.shtml
Individual publication links are listed below:
- http://www.cisco.com/warp/public/707/cisco-sa-20080924-ssl.shtml
- http://www.cisco.com/warp/public/707/cisco-sa-20080924-sip.shtml
- http://www.cisco.com/warp/public/707/cisco-sa-20080924-cucm.shtml
- http://www.cisco.com/warp/public/707/cisco-sa-20080924-vpn.shtml
- http://www.cisco.com/warp/public/707/cisco-sa-20080924-mfi.shtml
- http://www.cisco.com/warp/public/707/cisco-sa-20080924-ipc.shtml
- http://www.cisco.com/warp/public/707/cisco-sa-20080924-ubr.shtml
- http://www.cisco.com/warp/public/707/cisco-sa-20080924-multicast.shtml
- http://www.cisco.com/warp/public/707/cisco-sa-20080924-sccp.shtml
- http://www.cisco.com/warp/public/707/cisco-sa-20080924-iosfw.shtml
- http://www.cisco.com/warp/public/707/cisco-sa-20080924-l2tp.shtml
Affected Products
Vulnerable Products +------------------
Any Cisco IOS device configured with the Cisco IOS IPS feature is vulnerable, regardless if it is configured to use the built-in signatures or an external signature file. Devices using either version 4 or version 5 signatures are affected by this vulnerability.
The Cisco IOS IPS feature is not enabled by default. The command show ip ips interfaces can be used to determine if the Cisco IOS IPS feature has been configured and applied to any interface on the device, as in the following example:
Router#show ip ips interfaces
Interface Configuration
Interface FastEthernet0/0
Inbound IPS rule is ios-ips-incoming
Outgoing IPS rule is not set
Interface FastEthernet0/1
Inbound IPS rule is not set
Outgoing IPS rule is ios-ips-outgoing
Router#
The output of the show ip ips interfaces command when the Cisco IOS IPS feature has not been configured is dependent on which Cisco IOS release is installed and running on the device. It may be similar to the following example:
Router#show ip ips interfaces
Router#
or it may be similar to the following:
Router#show ip ips interfaces
Interface Configuration
IPS is not configured on any interface
Router#
Any version of Cisco IOS prior to the versions which are listed in the Software Versions and Fixes section below is vulnerable.
To determine the version of the Cisco IOS software running on a Cisco product, log in to the device and issue the show version command to display the system banner. Cisco IOS software will identify itself as "Internetwork Operating System Software" or simply "IOS". On the next line of output, the image name will be displayed between parentheses, followed by "Version" and the IOS release name. Other Cisco devices will not have the show version command or will give different output.
The following example identifies a Cisco product running Cisco IOS Software release 12.3(26) with an installed image name of C2500-IS-L:
Router#show version
Cisco Internetwork Operating System Software
IOS (tm) 2500 Software (C2500-IS-L), Version 12.3(26), RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2008 by cisco Systems, Inc.
Compiled Mon 17-Mar-08 14:39 by dchih
<output truncated>
Router#
The next example shows a product running Cisco IOS Software release 12.4(20)T with an image name of C1841-ADVENTERPRISEK9-M:
Router#show version
Cisco IOS Software, 1841 Software (C1841-ADVENTERPRISEK9-M), Version 12.4(20)T, RELEASE SOFTWARE (fc3)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2008 by Cisco Systems, Inc.
Compiled Thu 10-Jul-08 20:25 by prod_rel_team
<output truncated>
Router#
Additional information on the Cisco IOS release naming conventions can be found on the document entitled "White Paper: Cisco IOS Reference Guide", which is available at http://www.cisco.com/warp/public/620/1.html
Products Confirmed Not Vulnerable +--------------------------------
The following Cisco products are confirmed not vulnerable:
- Cisco IOS devices running the Intrusion Detection System feature
- Cisco ASA Security Appliances running the Intrusion Detection System feature
- Cisco PIX 500 Series Security Appliances running the Intrusion Detection System feature
- Cisco IPS 4200 Sensors
- Cisco AIP-SSM for ASA 5500 Series Adaptive Security Appliances
- Cisco Catalyst 6500 Series Intrusion detection System (IDSM-2) Services Module
- Cisco IPS Advanced Integration Module for Integrated Services Routers
No other Cisco products are currently known to be affected by this vulnerability. A component of the Cisco IOS Integrated Threat Control framework and complemented by Cisco IOS Flexible Packet Matching feature, Cisco IOS IPS provides your network with the intelligence to accurately identify, classify, and stop or block malicious traffic in real time. The Cisco IOS IDS feature is not affected by this vulnerability. This may cause a denial of service that results in disruption of network traffic. This vulnerability is documented in Cisco Bug ID CSCsq13348.
This vulnerability has been assigned Common Vulnerabilities and Exposures (CVE) ID CVE-2008-2739.
Vulnerability Scoring Details
Cisco has provided scores for the vulnerabilities in this advisory based on the Common Vulnerability Scoring System (CVSS). The CVSS scoring in this Security Advisory is done in accordance with CVSS version 2.0.
CVSS is a standards-based scoring method that conveys vulnerability severity and helps determine urgency and priority of response.
Cisco has provided a base and temporal score. Customers can then compute environmental scores to assist in determining the impact of the vulnerability in individual networks.
Cisco has provided an FAQ to answer additional questions regarding CVSS at
http://www.cisco.com/web/about/security/intelligence/cvss-qandas.html
Cisco has also provided a CVSS calculator to help compute the environmental impact for individual networks at
http://intellishield.cisco.com/security/alertmanager/cvss
CSCsq13348 - Watchdog timeout with IPS configured
CVSS Base Score - 7.8
Access Vector - Network
Access Complexity - Low
Authentication - None
Confidentiality Impact - None
Integrity Impact - None
Availability Impact - Complete
CVSS Temporal Score - 6.4
Exploitability - Functional
Remediation Level - Official-Fix
Report Confidence - Confirmed
Impact
Successful exploitation of this vulnerability may cause a Cisco IOS device configured with the Cisco IOS IPS feature to crash or hang, resulting in a denial of service condition.
Software Versions and Fixes
When considering software upgrades, also consult http://www.cisco.com/go/psirt and any subsequent advisories to determine exposure and a complete upgrade solution.
In all cases, customers should exercise caution to be certain the devices to be upgraded contain sufficient memory and that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, contact the Cisco Technical Assistance Center (TAC) or your contracted maintenance provider for assistance.
Each row of the Cisco IOS software table (below) names a Cisco IOS release train. If a given release train is vulnerable, then the earliest possible releases that contain the fix (along with the anticipated date of availability for each, if applicable) are listed in the "First Fixed Release" column of the table. The "Recommended Release" column indicates the releases which have fixes for all the published vulnerabilities at the time of this Advisory. A device running a release in the given train that is earlier than the release in a specific column (less than the First Fixed Release) is known to be vulnerable. Cisco recommends upgrading to a release equal to or later than the release in the "Recommended Releases" column of the table.
+-------------------------------------------------------------------+ | Major | Availability of Repaired Releases | | Release | | |------------+------------------------------------------------------| | Affected | | Recommended | | 12.0-Based | First Fixed Release | Release | | Releases | | | |-------------------------------------------------------------------| | There are no affected 12.0 based releases | |-------------------------------------------------------------------| | Affected | | Recommended | | 12.1-Based | First Fixed Release | Release | | Releases | | | |-------------------------------------------------------------------| | There are no affected 12.1 based releases | |-------------------------------------------------------------------| | Affected | | Recommended | | 12.2-Based | First Fixed Release | Release | | Releases | | | |-------------------------------------------------------------------| | There are no affected 12.2 based releases | |-------------------------------------------------------------------| | Affected | | Recommended | | 12.3-Based | First Fixed Release | Release | | Releases | | | |------------+--------------------------------------+---------------| | 12.3 | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3B | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3BC | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3BW | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3EU | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3JA | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3JEA | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3JEB | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3JEC | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3JK | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3JL | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3JX | Not Vulnerable | | |------------+--------------------------------------+---------------| | | | 12.4(15)T7 | | 12.3T | Vulnerable; first fixed in 12.4 | | | | | 12.4(18c) | |------------+--------------------------------------+---------------| | 12.3TPC | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3VA | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3XA | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3XB | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3XC | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3XD | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3XE | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3XF | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3XG | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3XI | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3XJ | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3XK | Not Vulnerable | | |------------+--------------------------------------+---------------| | | | 12.4(15)T7 | | 12.3XL | Vulnerable; first fixed in 12.4 | | | | | 12.4(18c) | |------------+--------------------------------------+---------------| | | | 12.4(15)T7 | | 12.3XQ | Vulnerable; first fixed in 12.4 | | | | | 12.4(18c) | |------------+--------------------------------------+---------------| | | | 12.4(15)T7 | | 12.3XR | Vulnerable; first fixed in 12.4 | | | | | 12.4(18c) | |------------+--------------------------------------+---------------| | | | 12.4(15)T7 | | 12.3XS | Vulnerable; first fixed in 12.4 | | | | | 12.4(18c) | |------------+--------------------------------------+---------------| | 12.3XU | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3XW | Not Vulnerable | | |------------+--------------------------------------+---------------| | | | 12.4(15)T7 | | 12.3XX | Vulnerable; first fixed in 12.4 | | | | | 12.4(18c) | |------------+--------------------------------------+---------------| | 12.3XY | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3XZ | Not Vulnerable | | |------------+--------------------------------------+---------------| | | | 12.4(15)T7 | | 12.3YA | Vulnerable; first fixed in 12.4 | | | | | 12.4(18c) | |------------+--------------------------------------+---------------| | 12.3YD | Vulnerable; first fixed in 12.4T | 12.4(15)T7 | |------------+--------------------------------------+---------------| | 12.3YF | Not Vulnerable | | |------------+--------------------------------------+---------------| | | Releases prior to 12.3(8)YG7 are | | | 12.3YG | vulnerable, release 12.3(8)YG7 and | 12.4(15)T7 | | | later are not vulnerable; first | | | | fixed in 12.4T | | |------------+--------------------------------------+---------------| | 12.3YH | Vulnerable; first fixed in 12.4T | 12.4(15)T7 | |------------+--------------------------------------+---------------| | 12.3YI | Vulnerable; first fixed in 12.4T | 12.4(15)T7 | |------------+--------------------------------------+---------------| | 12.3YJ | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3YK | Vulnerable; first fixed in 12.4T | 12.4(15)T7 | |------------+--------------------------------------+---------------| | | | 12.3(14)YM13; | | 12.3YM | 12.3(14)YM13; Available on 30-SEP-08 | Available on | | | | 30-SEP-08 | |------------+--------------------------------------+---------------| | 12.3YQ | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3YS | Vulnerable; first fixed in 12.4T | 12.4(15)T7 | |------------+--------------------------------------+---------------| | 12.3YT | Vulnerable; first fixed in 12.4T | 12.4(15)T7 | |------------+--------------------------------------+---------------| | 12.3YU | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3YX | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.3YZ | Vulnerable; contact TAC | | |------------+--------------------------------------+---------------| | 12.3ZA | Vulnerable; first fixed in 12.4T | 12.4(15)T7 | |------------+--------------------------------------+---------------| | Affected | | Recommended | | 12.4-Based | First Fixed Release | Release | | Releases | | | |------------+--------------------------------------+---------------| | | 12.4(18b) | | | | | | | 12.4 | 12.4(19a) | 12.4(18c) | | | | | | | 12.4(21) | | |------------+--------------------------------------+---------------| | 12.4JA | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.4JK | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.4JL | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.4JMA | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.4JMB | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.4JMC | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.4JX | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.4MD | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.4MR | 12.4(19)MR | 12.4(19)MR | |------------+--------------------------------------+---------------| | 12.4SW | Not Vulnerable | | |------------+--------------------------------------+---------------| | | 12.4(15)T6 | | | 12.4T | | 12.4(15)T7 | | | 12.4(20)T | | |------------+--------------------------------------+---------------| | 12.4XA | Vulnerable; first fixed in 12.4T | 12.4(15)T7 | |------------+--------------------------------------+---------------| | 12.4XB | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.4XC | Vulnerable; first fixed in 12.4T | 12.4(15)T7 | |------------+--------------------------------------+---------------| | | | 12.4(4)XD11; | | 12.4XD | 12.4(4)XD11; Available on 26-SEP-08 | Available on | | | | 26-SEP-08 | |------------+--------------------------------------+---------------| | 12.4XE | Vulnerable; first fixed in 12.4T | 12.4(15)T7 | |------------+--------------------------------------+---------------| | 12.4XF | Vulnerable; first fixed in 12.4T | 12.4(15)T7 | |------------+--------------------------------------+---------------| | 12.4XG | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.4XJ | Vulnerable; first fixed in 12.4T | 12.4(15)T7 | |------------+--------------------------------------+---------------| | 12.4XK | Vulnerable; first fixed in 12.4T | 12.4(15)T7 | |------------+--------------------------------------+---------------| | 12.4XL | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.4XM | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.4XN | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.4XP | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.4XQ | Not Vulnerable | | |------------+--------------------------------------+---------------| | 12.4XT | Vulnerable; first fixed in 12.4T | 12.4(15)T7 | |------------+--------------------------------------+---------------| | 12.4XV | Vulnerable; contact TAC | | |------------+--------------------------------------+---------------| | 12.4XW | 12.4(11)XW9 | 12.4(11)XW9 | |------------+--------------------------------------+---------------| | 12.4XY | 12.4(15)XY4 | 12.4(15)XY4 | |------------+--------------------------------------+---------------| | 12.4XZ | 12.4(15)XZ2 | 12.4(15)XZ2 | |------------+--------------------------------------+---------------| | 12.4YA | 12.4(20)YA1 | 12.4(20)YA1 | +-------------------------------------------------------------------+
Workarounds
The workaround consists of adding an Access Control List (ACL) to every Cisco IOS IPS policy configured on the device so that traffic destined to ports 53/udp or 53/tcp is not inspected by the Cisco IOS IPS feature. The following ACL would need to be added to the device configuration:
! deny inspection of traffic with a destination port of 53/udp
access-list 177 deny udp any any eq 53
! deny inspection of traffic with a destination port of 53/tcp
access-list 177 deny tcp any any eq 53
! allow all other traffic to be inspected
access-list 177 permit ip any any
Every instance of a Cisco IOS IPS policy on the device would then need to be modified in order to reference the previous ACL. In order to determine which Cisco IOS IPS policies are configured on the device, execute the command show running-config | include ip ips name as in the following example:
Router#show running-config | include ip ips name
ip ips name ios-ips-incoming
ip ips name ios-ips-outgoing
Router#
In the previous example, two Cisco IOS IPS policies are configured on the device. The following example shows the addition of an ACL to each one of the Cisco IOS IPS policies previously identified:
Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#ip ips name ios-ips-incoming list 177
Router(config)#ip ips name ios-ips-outgoing list 177
Router(config)#end
Router#
As a verification step, the command show ip ips interfaces can be executed again to verify the ACL has been properly attached to each one of the Cisco IOS IPS policies:
Router#show ip ips interfaces
Interface Configuration
Interface FastEthernet0/0
Inbound IPS rule is ios-ips-incoming
acl list 177
Outgoing IPS rule is not set
Interface FastEthernet0/1
Inbound IPS rule is not set
Outgoing IPS rule is ios-ips-outgoing
acl list 177
Router#
Note: Disabling or deleting individual or all signatures using the SERVICE.DNS engine of the Cisco IOS IPS feature is not a recommended workaround. The previous workaround is the only Cisco-recommended workaround for this vulnerability.
Obtaining Fixed Software
Cisco has released free software updates that address these vulnerabilities. Prior to deploying software, customers should consult their maintenance provider or check the software for feature set compatibility and known issues specific to their environment.
Customers may only install and expect support for the feature sets they have purchased. By installing, downloading, accessing or otherwise using such software upgrades, customers agree to be bound by the terms of Cisco's software license terms found at http://www.cisco.com/en/US/products/prod_warranties_item09186a008088e31f.html or as otherwise set forth at Cisco.com Downloads at http://www.cisco.com/public/sw-center/sw-usingswc.shtml
Do not contact psirt@cisco.com or security-alert@cisco.com for software upgrades.
Customers with Service Contracts +-------------------------------
Customers with contracts should obtain upgraded software through their regular update channels. For most customers, this means that upgrades should be obtained through the Software Center on Cisco's worldwide website at http://www.cisco.com/
Customers using Third Party Support Organizations +------------------------------------------------
Customers whose Cisco products are provided or maintained through prior or existing agreements with third-party support organizations, such as Cisco Partners, authorized resellers, or service providers should contact that support organization for guidance and assistance with the appropriate course of action in regards to this advisory.
The effectiveness of any workaround or fix is dependent on specific customer situations, such as product mix, network topology, traffic behavior, and organizational mission. Due to the variety of affected products and releases, customers should consult with their service provider or support organization to ensure any applied workaround or fix is the most appropriate for use in the intended network before it is deployed.
Customers without Service Contracts +----------------------------------
Customers who purchase direct from Cisco but do not hold a Cisco service contract, and customers who purchase through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should acquire upgrades by contacting the Cisco Technical Assistance Center (TAC). TAC contacts are as follows.
- +1 800 553 2447 (toll free from within North America)
- +1 408 526 7209 (toll call from anywhere in the world)
- e-mail: tac@cisco.com
Customers should have their product serial number available and be prepared to give the URL of this notice as evidence of entitlement to a free upgrade. Free upgrades for non-contract customers must be requested through the TAC.
Refer to http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml for additional TAC contact information, including localized telephone numbers, and instructions and e-mail addresses for use in various languages.
Exploitation and Public Announcements
The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability described in this advisory.
This vulnerability was reported to Cisco by a customer.
Status of this Notice: FINAL
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A stand-alone copy or Paraphrase of the text of this document that omits the distribution URL in the following section is an uncontrolled copy, and may lack important information or contain factual errors.
Distribution
This advisory is posted on Cisco's worldwide website at:
http://www.cisco.com/warp/public/707/cisco-sa-20080924-iosips.shtml
In addition to worldwide web posting, a text version of this notice is clear-signed with the Cisco PSIRT PGP key and is posted to the following e-mail and Usenet news recipients.
- cust-security-announce@cisco.com
- first-bulletins@lists.first.org
- bugtraq@securityfocus.com
- vulnwatch@vulnwatch.org
- cisco@spot.colorado.edu
- cisco-nsp@puck.nether.net
- full-disclosure@lists.grok.org.uk
- comp.dcom.sys.cisco@newsgate.cisco.com
Future updates of this advisory, if any, will be placed on Cisco's worldwide website, but may or may not be actively announced on mailing lists or newsgroups. Users concerned about this problem are encouraged to check the above URL for any updates.
Revision History
+----------------------------------------+ | Revision | | Initial | | 1.0 | 2008-September-24 | public | | | | release | +----------------------------------------+
Cisco Security Procedures
Complete information on reporting security vulnerabilities in Cisco products, obtaining assistance with security incidents, and registering to receive security information from Cisco, is available on Cisco's worldwide website at http://www.cisco.com/en/US/products/products_security_vulnerability_policy.html This includes instructions for press inquiries regarding Cisco security notices. All Cisco security advisories are available at http://www.cisco.com/go/psirt -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.8 (Darwin)
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Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/ . ----------------------------------------------------------------------
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TITLE: Cisco IOS Multiple Vulnerabilities
SECUNIA ADVISORY ID: SA31990
VERIFY ADVISORY: http://secunia.com/advisories/31990/
CRITICAL: Moderately critical
IMPACT: Exposure of sensitive information, DoS, System access
WHERE:
From remote
OPERATING SYSTEM: Cisco IOS R12.x http://secunia.com/advisories/product/50/ Cisco IOS 12.x http://secunia.com/advisories/product/182/
DESCRIPTION: Some vulnerabilities have been reported in Cisco IOS, which can be exploited by malicious people to disclose sensitive information, cause a DoS (Denial of Service), or to compromise a vulnerable system.
1) An unspecified error exists in the processing of SSL packets during the termination of an SSL session, which can potentially be exploited to crash an affected system.
2) Two unspecified errors exist within the processing of Protocol Independent Multicast (PIM) packets, which can be exploited to cause an affected device to reload.
3) Unspecified errors within the processing of segmented Skinny Call Control Protocol (SCCP) messages can be exploited to cause a Cisco IOS device to reload.
Successful exploitation requires that the device is configured with Network Address Translation (NAT) SCCP Fragmentation Support.
4) A memory leak in the processing of Session Initiation Protocol (SIP) messages can be exploited to cause a DoS for all voice services.
5) Multiple unspecified errors exist in the processing of SIP messages, which can be exploited to cause a reload of an affected device.
7) A security issue exists in the processing of extended communities with Multi Protocol Label Switching (MPLS) Virtual Private Networks (VPN), which can lead to traffic leaking from one MPLS VPN to another.
NOTE: This security issue was introduced with CSCee83237.
8) An unspecified error within the Multi Protocol Label Switching (MPLS) Forwarding Infrastructure (MFI) can be exploited to cause a DoS via specially crafted network packets.
Successful exploitation requires access to the MPLS network.
9) An unspecified error within the Application Inspection Control (AIC) can be exploited to cause a reload of an affected device via specially crafted HTTP packets.
10) An unspecified error in the processing of Layer 2 Tunneling Protocol (L2TP) packets can be exploited to cause an affected device to reload via a specially crafted L2TP packets.
Successful exploitation requires that the L2TP mgmt daemon process is running. This process may be enabled e.g. via Layer 2 virtual private networks (L2VPN), Layer 2 Tunnel Protocol Version 3 (L2TPv3), Stack Group Bidding Protocol (SGBP), or Cisco Virtual Private Dial-Up Networks (VPDN).
11) An unspecified error exists in the processing of IPC messages. This can be exploited to reload an affected device via a specially crafted UDP packet sent to port 1975.
12) A security issue is caused due to the device automatically enabling SNMP with a default community string, which can be exploited to gain control an affected system.
Successful exploitation requires that a device is configured for linecard redundancy.
SOLUTION: Update to the fixed version (please see the vendor's advisories for details).
PROVIDED AND/OR DISCOVERED BY: Reported by the vendor.
ORIGINAL ADVISORY: Cisco: http://www.cisco.com/warp/public/707/cisco-sa-20080924-ssl.shtml http://www.cisco.com/warp/public/707/cisco-sa-20080924-multicast.shtml http://www.cisco.com/warp/public/707/cisco-sa-20080924-sccp.shtml http://www.cisco.com/warp/public/707/cisco-sa-20080924-sip.shtml http://www.cisco.com/warp/public/707/cisco-sa-20080924-iosips.shtml http://www.cisco.com/warp/public/707/cisco-sa-20080924-vpn.shtml http://www.cisco.com/warp/public/707/cisco-sa-20080924-mfi.shtml http://www.cisco.com/warp/public/707/cisco-sa-20080924-iosfw.shtml http://www.cisco.com/warp/public/707/cisco-sa-20080924-l2tp.shtml http://www.cisco.com/warp/public/707/cisco-sa-20080924-ipc.shtml http://www.cisco.com/warp/public/707/cisco-sa-20080924-ubr.shtml
About: This Advisory was delivered by Secunia as a free service to help everybody keeping their systems up to date against the latest vulnerabilities.
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Show details on source website
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"data": "The SERVICE.DNS signature engine in the Intrusion Prevention System (IPS) in Cisco IOS 12.3 and 12.4 allows remote attackers to cause a denial of service (device crash or hang) via network traffic that triggers unspecified IPS signatures, a different vulnerability than CVE-2008-1447. \nA successful exploit will cause an affected device to crash, denying service to legitimate users. \n\nCisco has released free software updates that address this\nvulnerability. There is a workaround for this vulnerability. \n\nNote: This vulnerability is not related in any way to CVE-2008-1447 -\nCache poisoning attacks. Cisco Systems has published a Cisco Security\nAdvisory for that vulnerability, which can be found at \nhttp://www.cisco.com/en/US/products/products_security_advisory09186a00809c2168.shtml\n\nThis advisory is posted at \nhttp://www.cisco.com/warp/public/707/cisco-sa-20080924-iosips.shtml\n\nNote: The September 24, 2008 IOS Advisory bundled publication\nincludes twelve Security Advisories. Eleven of the advisories address\nvulnerabilities in Cisco\u0027s IOS software, and one advisory addresses\nvulnerabilities in Cisco Unified Communications Manager. Each\nAdvisory lists the releases that correct the vulnerability described\nin the Advisory. Please reference the following software table to\nfind a release that fixes all published IOS software Advisories as of\nSeptember 24th, 2008:\n\nhttp://www.cisco.com/warp/public/707/cisco-sa-20080924-bundle.shtml\n\nIndividual publication links are listed below:\n\n * http://www.cisco.com/warp/public/707/cisco-sa-20080924-ssl.shtml\n * http://www.cisco.com/warp/public/707/cisco-sa-20080924-sip.shtml\n * http://www.cisco.com/warp/public/707/cisco-sa-20080924-cucm.shtml\n * http://www.cisco.com/warp/public/707/cisco-sa-20080924-vpn.shtml\n * http://www.cisco.com/warp/public/707/cisco-sa-20080924-mfi.shtml\n * http://www.cisco.com/warp/public/707/cisco-sa-20080924-ipc.shtml\n * http://www.cisco.com/warp/public/707/cisco-sa-20080924-ubr.shtml\n * http://www.cisco.com/warp/public/707/cisco-sa-20080924-multicast.shtml\n * http://www.cisco.com/warp/public/707/cisco-sa-20080924-sccp.shtml\n * http://www.cisco.com/warp/public/707/cisco-sa-20080924-iosfw.shtml\n * http://www.cisco.com/warp/public/707/cisco-sa-20080924-l2tp.shtml\n\nAffected Products\n=================\n\nVulnerable Products\n+------------------\n\nAny Cisco IOS device configured with the Cisco IOS IPS feature is\nvulnerable, regardless if it is configured to use the built-in\nsignatures or an external signature file. Devices using either\nversion 4 or version 5 signatures are affected by this vulnerability. \n\nThe Cisco IOS IPS feature is not enabled by default. The command show\nip ips interfaces can be used to determine if the Cisco IOS IPS\nfeature has been configured and applied to any interface on the\ndevice, as in the following example:\n\n Router#show ip ips interfaces\n Interface Configuration\n Interface FastEthernet0/0\n Inbound IPS rule is ios-ips-incoming\n Outgoing IPS rule is not set\n Interface FastEthernet0/1\n Inbound IPS rule is not set\n Outgoing IPS rule is ios-ips-outgoing\n Router#\n\nThe output of the show ip ips interfaces command when the Cisco IOS\nIPS feature has not been configured is dependent on which Cisco IOS\nrelease is installed and running on the device. It may be similar to\nthe following example:\n\n Router#show ip ips interfaces\n\n Router#\n\nor it may be similar to the following:\n\n Router#show ip ips interfaces\n Interface Configuration\n IPS is not configured on any interface\n Router#\n\nAny version of Cisco IOS prior to the versions which are listed in\nthe Software Versions and Fixes section below is vulnerable. \n\nTo determine the version of the Cisco IOS software running on a Cisco\nproduct, log in to the device and issue the show version command to\ndisplay the system banner. Cisco IOS software will identify itself as\n\"Internetwork Operating System Software\" or simply \"IOS\". On the next\nline of output, the image name will be displayed between parentheses,\nfollowed by \"Version\" and the IOS release name. Other Cisco devices\nwill not have the show version command or will give different output. \n\nThe following example identifies a Cisco product running Cisco IOS\nSoftware release 12.3(26) with an installed image name of C2500-IS-L:\n\n Router#show version\n Cisco Internetwork Operating System Software\n IOS (tm) 2500 Software (C2500-IS-L), Version 12.3(26), RELEASE SOFTWARE (fc2)\n Technical Support: http://www.cisco.com/techsupport\n Copyright (c) 1986-2008 by cisco Systems, Inc. \n Compiled Mon 17-Mar-08 14:39 by dchih\n\n \u003coutput truncated\u003e\n Router#\n\nThe next example shows a product running Cisco IOS Software release\n12.4(20)T with an image name of C1841-ADVENTERPRISEK9-M:\n\n Router#show version\n Cisco IOS Software, 1841 Software (C1841-ADVENTERPRISEK9-M), Version 12.4(20)T, RELEASE SOFTWARE (fc3)\n Technical Support: http://www.cisco.com/techsupport\n Copyright (c) 1986-2008 by Cisco Systems, Inc. \n Compiled Thu 10-Jul-08 20:25 by prod_rel_team\n\n \u003coutput truncated\u003e\n Router#\n\nAdditional information on the Cisco IOS release naming conventions\ncan be found on the document entitled \"White Paper: Cisco IOS\nReference Guide\", which is available at \nhttp://www.cisco.com/warp/public/620/1.html\n\nProducts Confirmed Not Vulnerable\n+--------------------------------\n\nThe following Cisco products are confirmed not vulnerable:\n\n * Cisco IOS devices running the Intrusion Detection System feature\n * Cisco ASA Security Appliances running the Intrusion Detection\n System feature\n * Cisco PIX 500 Series Security Appliances running the Intrusion\n Detection System feature\n * Cisco IPS 4200 Sensors\n * Cisco AIP-SSM for ASA 5500 Series Adaptive Security Appliances\n * Cisco Catalyst 6500 Series Intrusion detection System (IDSM-2)\n Services Module\n * Cisco IPS Advanced Integration Module for Integrated Services\n Routers\n\nNo other Cisco products are currently known to be affected by this\nvulnerability. A component of the Cisco IOS Integrated Threat Control\nframework and complemented by Cisco IOS Flexible Packet Matching\nfeature, Cisco IOS IPS provides your network with the intelligence to\naccurately identify, classify, and stop or block malicious traffic in\nreal time. The Cisco IOS IDS feature is not affected by this\nvulnerability. This may cause a denial of service that results in disruption\nof network traffic. This vulnerability is documented in Cisco Bug ID\nCSCsq13348. \n\nThis vulnerability has been assigned Common Vulnerabilities and\nExposures (CVE) ID CVE-2008-2739. \n\nVulnerability Scoring Details\n=============================\n\nCisco has provided scores for the vulnerabilities in this advisory\nbased on the Common Vulnerability Scoring System (CVSS). The CVSS\nscoring in this Security Advisory is done in accordance with CVSS\nversion 2.0. \n\nCVSS is a standards-based scoring method that conveys vulnerability\nseverity and helps determine urgency and priority of response. \n\nCisco has provided a base and temporal score. Customers can then\ncompute environmental scores to assist in determining the impact of\nthe vulnerability in individual networks. \n\nCisco has provided an FAQ to answer additional questions regarding\nCVSS at\n\nhttp://www.cisco.com/web/about/security/intelligence/cvss-qandas.html\n\nCisco has also provided a CVSS calculator to help compute the\nenvironmental impact for individual networks at\n\nhttp://intellishield.cisco.com/security/alertmanager/cvss\n\nCSCsq13348 - Watchdog timeout with IPS configured\n\nCVSS Base Score - 7.8\n\n Access Vector - Network\n Access Complexity - Low\n Authentication - None\n Confidentiality Impact - None\n Integrity Impact - None\n Availability Impact - Complete\n\nCVSS Temporal Score - 6.4\n\n Exploitability - Functional\n Remediation Level - Official-Fix\n Report Confidence - Confirmed\n\nImpact\n======\n\nSuccessful exploitation of this vulnerability may cause a Cisco IOS\ndevice configured with the Cisco IOS IPS feature to crash or hang,\nresulting in a denial of service condition. \n\nSoftware Versions and Fixes\n===========================\n\nWhen considering software upgrades, also consult \nhttp://www.cisco.com/go/psirt and any subsequent advisories to \ndetermine exposure and a complete upgrade solution. \n\nIn all cases, customers should exercise caution to be certain the\ndevices to be upgraded contain sufficient memory and that current\nhardware and software configurations will continue to be supported\nproperly by the new release. If the information is not clear, contact\nthe Cisco Technical Assistance Center (TAC) or your contracted\nmaintenance provider for assistance. \n\nEach row of the Cisco IOS software table (below) names a Cisco IOS\nrelease train. If a given release train is vulnerable, then the\nearliest possible releases that contain the fix (along with the\nanticipated date of availability for each, if applicable) are listed\nin the \"First Fixed Release\" column of the table. The \"Recommended\nRelease\" column indicates the releases which have fixes for all the\npublished vulnerabilities at the time of this Advisory. A device\nrunning a release in the given train that is earlier than the release\nin a specific column (less than the First Fixed Release) is known to\nbe vulnerable. Cisco recommends upgrading to a release equal to or\nlater than the release in the \"Recommended Releases\" column of the\ntable. \n\n+-------------------------------------------------------------------+\n| Major | Availability of Repaired Releases |\n| Release | |\n|------------+------------------------------------------------------|\n| Affected | | Recommended |\n| 12.0-Based | First Fixed Release | Release |\n| Releases | | |\n|-------------------------------------------------------------------|\n| There are no affected 12.0 based releases |\n|-------------------------------------------------------------------|\n| Affected | | Recommended |\n| 12.1-Based | First Fixed Release | Release |\n| Releases | | |\n|-------------------------------------------------------------------|\n| There are no affected 12.1 based releases |\n|-------------------------------------------------------------------|\n| Affected | | Recommended |\n| 12.2-Based | First Fixed Release | Release |\n| Releases | | |\n|-------------------------------------------------------------------|\n| There are no affected 12.2 based releases |\n|-------------------------------------------------------------------|\n| Affected | | Recommended |\n| 12.3-Based | First Fixed Release | Release |\n| Releases | | |\n|------------+--------------------------------------+---------------|\n| 12.3 | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3B | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3BC | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3BW | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3EU | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3JA | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3JEA | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3JEB | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3JEC | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3JK | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3JL | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3JX | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| | | 12.4(15)T7 |\n| 12.3T | Vulnerable; first fixed in 12.4 | |\n| | | 12.4(18c) |\n|------------+--------------------------------------+---------------|\n| 12.3TPC | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3VA | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3XA | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3XB | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3XC | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3XD | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3XE | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3XF | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3XG | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3XI | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3XJ | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3XK | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| | | 12.4(15)T7 |\n| 12.3XL | Vulnerable; first fixed in 12.4 | |\n| | | 12.4(18c) |\n|------------+--------------------------------------+---------------|\n| | | 12.4(15)T7 |\n| 12.3XQ | Vulnerable; first fixed in 12.4 | |\n| | | 12.4(18c) |\n|------------+--------------------------------------+---------------|\n| | | 12.4(15)T7 |\n| 12.3XR | Vulnerable; first fixed in 12.4 | |\n| | | 12.4(18c) |\n|------------+--------------------------------------+---------------|\n| | | 12.4(15)T7 |\n| 12.3XS | Vulnerable; first fixed in 12.4 | |\n| | | 12.4(18c) |\n|------------+--------------------------------------+---------------|\n| 12.3XU | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3XW | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| | | 12.4(15)T7 |\n| 12.3XX | Vulnerable; first fixed in 12.4 | |\n| | | 12.4(18c) |\n|------------+--------------------------------------+---------------|\n| 12.3XY | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3XZ | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| | | 12.4(15)T7 |\n| 12.3YA | Vulnerable; first fixed in 12.4 | |\n| | | 12.4(18c) |\n|------------+--------------------------------------+---------------|\n| 12.3YD | Vulnerable; first fixed in 12.4T | 12.4(15)T7 |\n|------------+--------------------------------------+---------------|\n| 12.3YF | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| | Releases prior to 12.3(8)YG7 are | |\n| 12.3YG | vulnerable, release 12.3(8)YG7 and | 12.4(15)T7 |\n| | later are not vulnerable; first | |\n| | fixed in 12.4T | |\n|------------+--------------------------------------+---------------|\n| 12.3YH | Vulnerable; first fixed in 12.4T | 12.4(15)T7 |\n|------------+--------------------------------------+---------------|\n| 12.3YI | Vulnerable; first fixed in 12.4T | 12.4(15)T7 |\n|------------+--------------------------------------+---------------|\n| 12.3YJ | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3YK | Vulnerable; first fixed in 12.4T | 12.4(15)T7 |\n|------------+--------------------------------------+---------------|\n| | | 12.3(14)YM13; |\n| 12.3YM | 12.3(14)YM13; Available on 30-SEP-08 | Available on |\n| | | 30-SEP-08 |\n|------------+--------------------------------------+---------------|\n| 12.3YQ | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3YS | Vulnerable; first fixed in 12.4T | 12.4(15)T7 |\n|------------+--------------------------------------+---------------|\n| 12.3YT | Vulnerable; first fixed in 12.4T | 12.4(15)T7 |\n|------------+--------------------------------------+---------------|\n| 12.3YU | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3YX | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.3YZ | Vulnerable; contact TAC | |\n|------------+--------------------------------------+---------------|\n| 12.3ZA | Vulnerable; first fixed in 12.4T | 12.4(15)T7 |\n|------------+--------------------------------------+---------------|\n| Affected | | Recommended |\n| 12.4-Based | First Fixed Release | Release |\n| Releases | | |\n|------------+--------------------------------------+---------------|\n| | 12.4(18b) | |\n| | | |\n| 12.4 | 12.4(19a) | 12.4(18c) |\n| | | |\n| | 12.4(21) | |\n|------------+--------------------------------------+---------------|\n| 12.4JA | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.4JK | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.4JL | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.4JMA | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.4JMB | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.4JMC | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.4JX | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.4MD | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.4MR | 12.4(19)MR | 12.4(19)MR |\n|------------+--------------------------------------+---------------|\n| 12.4SW | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| | 12.4(15)T6 | |\n| 12.4T | | 12.4(15)T7 |\n| | 12.4(20)T | |\n|------------+--------------------------------------+---------------|\n| 12.4XA | Vulnerable; first fixed in 12.4T | 12.4(15)T7 |\n|------------+--------------------------------------+---------------|\n| 12.4XB | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.4XC | Vulnerable; first fixed in 12.4T | 12.4(15)T7 |\n|------------+--------------------------------------+---------------|\n| | | 12.4(4)XD11; |\n| 12.4XD | 12.4(4)XD11; Available on 26-SEP-08 | Available on |\n| | | 26-SEP-08 |\n|------------+--------------------------------------+---------------|\n| 12.4XE | Vulnerable; first fixed in 12.4T | 12.4(15)T7 |\n|------------+--------------------------------------+---------------|\n| 12.4XF | Vulnerable; first fixed in 12.4T | 12.4(15)T7 |\n|------------+--------------------------------------+---------------|\n| 12.4XG | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.4XJ | Vulnerable; first fixed in 12.4T | 12.4(15)T7 |\n|------------+--------------------------------------+---------------|\n| 12.4XK | Vulnerable; first fixed in 12.4T | 12.4(15)T7 |\n|------------+--------------------------------------+---------------|\n| 12.4XL | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.4XM | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.4XN | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.4XP | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.4XQ | Not Vulnerable | |\n|------------+--------------------------------------+---------------|\n| 12.4XT | Vulnerable; first fixed in 12.4T | 12.4(15)T7 |\n|------------+--------------------------------------+---------------|\n| 12.4XV | Vulnerable; contact TAC | |\n|------------+--------------------------------------+---------------|\n| 12.4XW | 12.4(11)XW9 | 12.4(11)XW9 |\n|------------+--------------------------------------+---------------|\n| 12.4XY | 12.4(15)XY4 | 12.4(15)XY4 |\n|------------+--------------------------------------+---------------|\n| 12.4XZ | 12.4(15)XZ2 | 12.4(15)XZ2 |\n|------------+--------------------------------------+---------------|\n| 12.4YA | 12.4(20)YA1 | 12.4(20)YA1 |\n+-------------------------------------------------------------------+\n\nWorkarounds\n===========\n\nThe workaround consists of adding an Access Control List (ACL) to\nevery Cisco IOS IPS policy configured on the device so that traffic\ndestined to ports 53/udp or 53/tcp is not inspected by the Cisco IOS\nIPS feature. The following ACL would need to be added to the device\nconfiguration:\n\n ! deny inspection of traffic with a destination port of 53/udp\n access-list 177 deny udp any any eq 53\n ! deny inspection of traffic with a destination port of 53/tcp\n access-list 177 deny tcp any any eq 53\n ! allow all other traffic to be inspected\n access-list 177 permit ip any any\n\nEvery instance of a Cisco IOS IPS policy on the device would then\nneed to be modified in order to reference the previous ACL. In order\nto determine which Cisco IOS IPS policies are configured on the\ndevice, execute the command show running-config | include ip ips name\nas in the following example:\n\n Router#show running-config | include ip ips name\n ip ips name ios-ips-incoming\n ip ips name ios-ips-outgoing\n Router#\n\nIn the previous example, two Cisco IOS IPS policies are configured on\nthe device. The following example shows the addition of an ACL to\neach one of the Cisco IOS IPS policies previously identified:\n\n Router#configure terminal\n Enter configuration commands, one per line. End with CNTL/Z. \n Router(config)#ip ips name ios-ips-incoming list 177\n Router(config)#ip ips name ios-ips-outgoing list 177\n Router(config)#end\n Router#\n\nAs a verification step, the command show ip ips interfaces can be\nexecuted again to verify the ACL has been properly attached to each\none of the Cisco IOS IPS policies:\n\n Router#show ip ips interfaces\n Interface Configuration\n Interface FastEthernet0/0\n Inbound IPS rule is ios-ips-incoming\n acl list 177\n Outgoing IPS rule is not set\n Interface FastEthernet0/1\n Inbound IPS rule is not set\n Outgoing IPS rule is ios-ips-outgoing\n acl list 177\n Router#\n\nNote: Disabling or deleting individual or all signatures using the\nSERVICE.DNS engine of the Cisco IOS IPS feature is not a recommended\nworkaround. The previous workaround is the only Cisco-recommended\nworkaround for this vulnerability. \n\nObtaining Fixed Software\n========================\n\nCisco has released free software updates that address these\nvulnerabilities. Prior to deploying software, customers should\nconsult their maintenance provider or check the software for feature\nset compatibility and known issues specific to their environment. \n\nCustomers may only install and expect support for the feature sets\nthey have purchased. By installing, downloading, accessing or\notherwise using such software upgrades, customers agree to be bound\nby the terms of Cisco\u0027s software license terms found at \nhttp://www.cisco.com/en/US/products/prod_warranties_item09186a008088e31f.html \nor as otherwise set forth at Cisco.com Downloads at \nhttp://www.cisco.com/public/sw-center/sw-usingswc.shtml\n\nDo not contact psirt@cisco.com or security-alert@cisco.com for\nsoftware upgrades. \n\nCustomers with Service Contracts\n+-------------------------------\n\nCustomers with contracts should obtain upgraded software through\ntheir regular update channels. For most customers, this means that\nupgrades should be obtained through the Software Center on Cisco\u0027s\nworldwide website at http://www.cisco.com/\n\nCustomers using Third Party Support Organizations\n+------------------------------------------------\n\nCustomers whose Cisco products are provided or maintained through\nprior or existing agreements with third-party support organizations,\nsuch as Cisco Partners, authorized resellers, or service providers\nshould contact that support organization for guidance and assistance\nwith the appropriate course of action in regards to this advisory. \n\nThe effectiveness of any workaround or fix is dependent on specific\ncustomer situations, such as product mix, network topology, traffic\nbehavior, and organizational mission. Due to the variety of affected\nproducts and releases, customers should consult with their service\nprovider or support organization to ensure any applied workaround or\nfix is the most appropriate for use in the intended network before it\nis deployed. \n\nCustomers without Service Contracts\n+----------------------------------\n\nCustomers who purchase direct from Cisco but do not hold a Cisco\nservice contract, and customers who purchase through third-party\nvendors but are unsuccessful in obtaining fixed software through\ntheir point of sale should acquire upgrades by contacting the Cisco\nTechnical Assistance Center (TAC). TAC contacts are as follows. \n\n * +1 800 553 2447 (toll free from within North America)\n * +1 408 526 7209 (toll call from anywhere in the world)\n * e-mail: tac@cisco.com\n\nCustomers should have their product serial number available and be\nprepared to give the URL of this notice as evidence of entitlement to\na free upgrade. Free upgrades for non-contract customers must be\nrequested through the TAC. \n\nRefer to http://www.cisco.com/warp/public/687/Directory/DirTAC.shtml\nfor additional TAC contact information, including localized telephone\nnumbers, and instructions and e-mail addresses for use in various\nlanguages. \n\nExploitation and Public Announcements\n=====================================\n\nThe Cisco PSIRT is not aware of any public announcements or malicious\nuse of the vulnerability described in this advisory. \n\nThis vulnerability was reported to Cisco by a customer. \n\nStatus of this Notice: FINAL\n============================\n\nTHIS DOCUMENT IS PROVIDED ON AN \"AS IS\" BASIS AND DOES NOT IMPLY ANY\nKIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF\nMERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE\nINFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS\nAT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS\nDOCUMENT AT ANY TIME. \n\nA stand-alone copy or Paraphrase of the text of this document that\nomits the distribution URL in the following section is an\nuncontrolled copy, and may lack important information or contain\nfactual errors. \n\nDistribution\n============\n\nThis advisory is posted on Cisco\u0027s worldwide website at:\n\nhttp://www.cisco.com/warp/public/707/cisco-sa-20080924-iosips.shtml\n\nIn addition to worldwide web posting, a text version of this notice\nis clear-signed with the Cisco PSIRT PGP key and is posted to the\nfollowing e-mail and Usenet news recipients. \n\n * cust-security-announce@cisco.com\n * first-bulletins@lists.first.org\n * bugtraq@securityfocus.com\n * vulnwatch@vulnwatch.org\n * cisco@spot.colorado.edu\n * cisco-nsp@puck.nether.net\n * full-disclosure@lists.grok.org.uk\n * comp.dcom.sys.cisco@newsgate.cisco.com\n\nFuture updates of this advisory, if any, will be placed on Cisco\u0027s\nworldwide website, but may or may not be actively announced on\nmailing lists or newsgroups. Users concerned about this problem are\nencouraged to check the above URL for any updates. \n\nRevision History\n================\n\n+----------------------------------------+\n| Revision | | Initial |\n| 1.0 | 2008-September-24 | public |\n| | | release |\n+----------------------------------------+\n\nCisco Security Procedures\n=========================\n\nComplete information on reporting security vulnerabilities in Cisco\nproducts, obtaining assistance with security incidents, and\nregistering to receive security information from Cisco, is available\non Cisco\u0027s worldwide website at \nhttp://www.cisco.com/en/US/products/products_security_vulnerability_policy.html\nThis includes instructions for press inquiries regarding Cisco \nsecurity notices. All Cisco security advisories are available at \nhttp://www.cisco.com/go/psirt\n-----BEGIN PGP SIGNATURE-----\nVersion: GnuPG v1.4.8 (Darwin)\n\niEYEARECAAYFAkjaLb4ACgkQ86n/Gc8U/uCOcQCfVtBrGIC3MJQr9jaPkMlt3ikc\nXrEAn1XOyW6nTAO/lsY5edWYzRoTuLDe\n=HgRp\n-----END PGP SIGNATURE-----\n\n_______________________________________________\nFull-Disclosure - We believe in it. \nCharter: http://lists.grok.org.uk/full-disclosure-charter.html\nHosted and sponsored by Secunia - http://secunia.com/\n. ----------------------------------------------------------------------\n\nDo you need accurate and reliable IDS / IPS / AV detection rules?\n\nGet in-depth vulnerability details:\nhttp://secunia.com/binary_analysis/sample_analysis/\n\n----------------------------------------------------------------------\n\nTITLE:\nCisco IOS Multiple Vulnerabilities\n\nSECUNIA ADVISORY ID:\nSA31990\n\nVERIFY ADVISORY:\nhttp://secunia.com/advisories/31990/\n\nCRITICAL:\nModerately critical\n\nIMPACT:\nExposure of sensitive information, DoS, System access\n\nWHERE:\n\u003eFrom remote\n\nOPERATING SYSTEM:\nCisco IOS R12.x\nhttp://secunia.com/advisories/product/50/\nCisco IOS 12.x\nhttp://secunia.com/advisories/product/182/\n\nDESCRIPTION:\nSome vulnerabilities have been reported in Cisco IOS, which can be\nexploited by malicious people to disclose sensitive information,\ncause a DoS (Denial of Service), or to compromise a vulnerable\nsystem. \n\n1) An unspecified error exists in the processing of SSL packets\nduring the termination of an SSL session, which can potentially be\nexploited to crash an affected system. \n\n2) Two unspecified errors exist within the processing of Protocol\nIndependent Multicast (PIM) packets, which can be exploited to cause\nan affected device to reload. \n\n3) Unspecified errors within the processing of segmented Skinny Call\nControl Protocol (SCCP) messages can be exploited to cause a Cisco\nIOS device to reload. \n\nSuccessful exploitation requires that the device is configured with\nNetwork Address Translation (NAT) SCCP Fragmentation Support. \n\n4) A memory leak in the processing of Session Initiation Protocol\n(SIP) messages can be exploited to cause a DoS for all voice\nservices. \n\n5) Multiple unspecified errors exist in the processing of SIP\nmessages, which can be exploited to cause a reload of an affected\ndevice. \n\n7) A security issue exists in the processing of extended communities\nwith Multi Protocol Label Switching (MPLS) Virtual Private Networks\n(VPN), which can lead to traffic leaking from one MPLS VPN to\nanother. \n\nNOTE: This security issue was introduced with CSCee83237. \n\n8) An unspecified error within the Multi Protocol Label Switching\n(MPLS) Forwarding Infrastructure (MFI) can be exploited to cause a\nDoS via specially crafted network packets. \n\nSuccessful exploitation requires access to the MPLS network. \n\n9) An unspecified error within the Application Inspection Control\n(AIC) can be exploited to cause a reload of an affected device via\nspecially crafted HTTP packets. \n\n10) An unspecified error in the processing of Layer 2 Tunneling\nProtocol (L2TP) packets can be exploited to cause an affected device\nto reload via a specially crafted L2TP packets. \n\nSuccessful exploitation requires that the L2TP mgmt daemon process is\nrunning. This process may be enabled e.g. via Layer 2 virtual private\nnetworks (L2VPN), Layer 2 Tunnel Protocol Version 3 (L2TPv3), Stack\nGroup Bidding Protocol (SGBP), or Cisco Virtual Private Dial-Up\nNetworks (VPDN). \n\n11) An unspecified error exists in the processing of IPC messages. \nThis can be exploited to reload an affected device via a specially\ncrafted UDP packet sent to port 1975. \n\n12) A security issue is caused due to the device automatically\nenabling SNMP with a default community string, which can be exploited\nto gain control an affected system. \n\nSuccessful exploitation requires that a device is configured for\nlinecard redundancy. \n\nSOLUTION:\nUpdate to the fixed version (please see the vendor\u0027s advisories for\ndetails). \n\nPROVIDED AND/OR DISCOVERED BY:\nReported by the vendor. \n\nORIGINAL ADVISORY:\nCisco:\nhttp://www.cisco.com/warp/public/707/cisco-sa-20080924-ssl.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20080924-multicast.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20080924-sccp.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20080924-sip.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20080924-iosips.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20080924-vpn.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20080924-mfi.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20080924-iosfw.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20080924-l2tp.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20080924-ipc.shtml\nhttp://www.cisco.com/warp/public/707/cisco-sa-20080924-ubr.shtml\n\n----------------------------------------------------------------------\n\nAbout:\nThis Advisory was delivered by Secunia as a free service to help\neverybody keeping their systems up to date against the latest\nvulnerabilities. \n\nSubscribe:\nhttp://secunia.com/advisories/secunia_security_advisories/\n\nDefinitions: (Criticality, Where etc.)\nhttp://secunia.com/advisories/about_secunia_advisories/\n\n\nPlease Note:\nSecunia recommends that you verify all advisories you receive by\nclicking the link. \nSecunia NEVER sends attached files with advisories. \nSecunia does not advise people to install third party patches, only\nuse those supplied by the vendor. \n\n----------------------------------------------------------------------\n\nUnsubscribe: Secunia Security Advisories\nhttp://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org\n\n----------------------------------------------------------------------\n\n\n",
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gsd-2008-2739
Vulnerability from gsd
{
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"description": "The SERVICE.DNS signature engine in the Intrusion Prevention System (IPS) in Cisco IOS 12.3 and 12.4 allows remote attackers to cause a denial of service (device crash or hang) via network traffic that triggers unspecified IPS signatures, a different vulnerability than CVE-2008-1447.",
"id": "GSD-2008-2739"
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"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
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"id": "GSD-2008-2739",
"modified": "2023-12-13T01:23:00.575928Z",
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{
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},
{
"name": "oval:org.mitre.oval:def:6058",
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},
"impact": {
"baseMetricV2": {
"cvssV2": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "COMPLETE",
"baseScore": 7.8,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 6.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"severity": "HIGH",
"userInteractionRequired": false
}
},
"lastModifiedDate": "2022-06-02T17:09Z",
"publishedDate": "2008-09-26T16:21Z"
}
}
}
ghsa-3x69-mjh4-vwh4
Vulnerability from github
The SERVICE.DNS signature engine in the Intrusion Prevention System (IPS) in Cisco IOS 12.3 and 12.4 allows remote attackers to cause a denial of service (device crash or hang) via network traffic that triggers unspecified IPS signatures, a different vulnerability than CVE-2008-1447.
{
"affected": [],
"aliases": [
"CVE-2008-2739"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2008-09-26T16:21:00Z",
"severity": "HIGH"
},
"details": "The SERVICE.DNS signature engine in the Intrusion Prevention System (IPS) in Cisco IOS 12.3 and 12.4 allows remote attackers to cause a denial of service (device crash or hang) via network traffic that triggers unspecified IPS signatures, a different vulnerability than CVE-2008-1447.",
"id": "GHSA-3x69-mjh4-vwh4",
"modified": "2022-05-01T23:52:53Z",
"published": "2022-05-01T23:52:53Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2008-2739"
},
{
"type": "WEB",
"url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6058"
},
{
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"url": "http://secunia.com/advisories/31990"
},
{
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"url": "http://www.cisco.com/en/US/products/products_security_advisory09186a0080a01556.shtml"
},
{
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],
"schema_version": "1.4.0",
"severity": []
}
fkie_cve-2008-2739
Vulnerability from fkie_nvd
| URL | Tags | ||
|---|---|---|---|
| psirt@cisco.com | http://secunia.com/advisories/31990 | Third Party Advisory | |
| psirt@cisco.com | http://www.cisco.com/en/US/products/products_security_advisory09186a0080a01556.shtml | Vendor Advisory | |
| psirt@cisco.com | http://www.vupen.com/english/advisories/2008/2670 | Permissions Required, Third Party Advisory | |
| psirt@cisco.com | https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6058 | Broken Link | |
| af854a3a-2127-422b-91ae-364da2661108 | http://secunia.com/advisories/31990 | Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | http://www.cisco.com/en/US/products/products_security_advisory09186a0080a01556.shtml | Vendor Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | http://www.vupen.com/english/advisories/2008/2670 | Permissions Required, Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6058 | Broken Link |
| Vendor | Product | Version | |
|---|---|---|---|
| cisco | ios | 12.3t | |
| cisco | ios | 12.3xl | |
| cisco | ios | 12.3xq | |
| cisco | ios | 12.3xr | |
| cisco | ios | 12.3xs | |
| cisco | ios | 12.3xx | |
| cisco | ios | 12.3ya | |
| cisco | ios | 12.3yd | |
| cisco | ios | 12.3yg | |
| cisco | ios | 12.3yh | |
| cisco | ios | 12.3yi | |
| cisco | ios | 12.3yk | |
| cisco | ios | 12.3ys | |
| cisco | ios | 12.3yt | |
| cisco | ios | 12.3za | |
| cisco | ios | 12.4xa | |
| cisco | ios | 12.4xc | |
| cisco | ios | 12.4xe | |
| cisco | ios | 12.4xf | |
| cisco | ios | 12.4xj | |
| cisco | ios | 12.4xk | |
| cisco | ios | 12.4xt | |
| cisco | ios | 12.4xv |
{
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],
"negate": false,
"operator": "OR"
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]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "The SERVICE.DNS signature engine in the Intrusion Prevention System (IPS) in Cisco IOS 12.3 and 12.4 allows remote attackers to cause a denial of service (device crash or hang) via network traffic that triggers unspecified IPS signatures, a different vulnerability than CVE-2008-1447."
},
{
"lang": "es",
"value": "El motor de firma SERVICE.DNS en Intrusion Prevention System (IPS) en Cisco IOS v12.3 y v12.4, permite a atacantes remotos provocar una denegaci\u00f3n de servicio (ca\u00edda o cuelgue de dispositivo) a trav\u00e9s de tr\u00e1fico de red que lanza un firma IPS sin especificar. Vulnerabilidad distinta de CVE-2008-1447."
}
],
"id": "CVE-2008-2739",
"lastModified": "2025-04-09T00:30:58.490",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "HIGH",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "COMPLETE",
"baseScore": 7.8,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 6.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
]
},
"published": "2008-09-26T16:21:43.957",
"references": [
{
"source": "psirt@cisco.com",
"tags": [
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],
"url": "http://secunia.com/advisories/31990"
},
{
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"tags": [
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],
"url": "http://www.cisco.com/en/US/products/products_security_advisory09186a0080a01556.shtml"
},
{
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],
"url": "http://www.vupen.com/english/advisories/2008/2670"
},
{
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"tags": [
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],
"url": "https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6058"
},
{
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],
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},
{
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},
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},
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],
"sourceIdentifier": "psirt@cisco.com",
"vulnStatus": "Deferred",
"weaknesses": [
{
"description": [
{
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"value": "NVD-CWE-noinfo"
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],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.