ID CVE-2012-3571
Summary ISC DHCP 4.1.2 through 4.2.4 and 4.1-ESV before 4.1-ESV-R6 allows remote attackers to cause a denial of service (infinite loop and CPU consumption) via a malformed client identifier.
References
Vulnerable Configurations
  • ISC DHCP 4.1.2
    cpe:2.3:a:isc:dhcp:4.1.2
  • ISC DHCP 4.2.0
    cpe:2.3:a:isc:dhcp:4.2.0
  • ISC DHCP 4.2.0 A1
    cpe:2.3:a:isc:dhcp:4.2.0:a1
  • ISC DHCP 4.2.0 A2
    cpe:2.3:a:isc:dhcp:4.2.0:a2
  • ISC DHCP 4.2.0-P1
    cpe:2.3:a:isc:dhcp:4.2.0:p1
  • ISC DHCP 4.2.1 Release Candidate 1
    cpe:2.3:a:isc:dhcp:4.2.1:rc1
  • ISC DHCP 4.2.1 b1
    cpe:2.3:a:isc:dhcp:4.2.1:b1
  • ISC DHCP 4.2.0 B1
    cpe:2.3:a:isc:dhcp:4.2.0:b1
  • ISC DHCP 4.2.0 B1
    cpe:2.3:a:isc:dhcp:4.2.0:b2
  • ISC DHCP 4.2.0 release candidate 1
    cpe:2.3:a:isc:dhcp:4.2.0:rc1
  • ISC DHCP 4.2.1
    cpe:2.3:a:isc:dhcp:4.2.1
  • ISC DHCP 4.2.2
    cpe:2.3:a:isc:dhcp:4.2.2
  • ISC DHCP 4.2.2 release candidate 1
    cpe:2.3:a:isc:dhcp:4.2.2:rc1
  • ISC DHCP 4.2.2 b1
    cpe:2.3:a:isc:dhcp:4.2.2:b1
  • ISC DHCP 4.2.3
    cpe:2.3:a:isc:dhcp:4.2.3
  • ISC DHCP 4.2.3-p2
    cpe:2.3:a:isc:dhcp:4.2.3:p2
  • ISC DHCP 4.2.4
    cpe:2.3:a:isc:dhcp:4.2.4
  • ISC DHCP 4.2.3-p1
    cpe:2.3:a:isc:dhcp:4.2.3:p1
  • ISC DHCP 4.1-ESV
    cpe:2.3:a:isc:dhcp:4.1-esv
  • ISC DHCP 4.1-ESV R1
    cpe:2.3:a:isc:dhcp:4.1-esv:r1
  • ISC DHCP 4.1-ESV R2
    cpe:2.3:a:isc:dhcp:4.1-esv:r2
  • ISC DHCP 4.1-ESV R3
    cpe:2.3:a:isc:dhcp:4.1-esv:r3
  • ISC DHCP 4.1-ESV R3 b1
    cpe:2.3:a:isc:dhcp:4.1-esv:r3_b1
  • ISC DHCP 4.1-ESV-R4
    cpe:2.3:a:isc:dhcp:4.1-esv:r4
  • ISC DHCP 4.1-ESV-R5
    cpe:2.3:a:isc:dhcp:4.1-esv:r5
  • ISC DHCP 4.1-ESV-R5b1
    cpe:2.3:a:isc:dhcp:4.1-esv:r5_b1
  • ISC DHCP 4.1-ESV-R5rc1
    cpe:2.3:a:isc:dhcp:4.1-esv:r5_rc1
  • ISC DHCP 4.1-ESV-R5rc2
    cpe:2.3:a:isc:dhcp:4.1-esv:r5_rc2
CVSS
Base: 6.1 (as of 25-07-2012 - 10:26)
Impact:
Exploitability:
CWE CWE-119
CAPEC
  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.
  • Overflow Binary Resource File
    An attack of this type exploits a buffer overflow vulnerability in the handling of binary resources. Binary resources may include music files like MP3, image files like JPEG files, and any other binary file. These attacks may pass unnoticed to the client machine through normal usage of files, such as a browser loading a seemingly innocent JPEG file. This can allow the attacker access to the execution stack and execute arbitrary code in the target process. This attack pattern is a variant of standard buffer overflow attacks using an unexpected vector (binary files) to wrap its attack and open up a new attack vector. The attacker is required to either directly serve the binary content to the victim, or place it in a locale like a MP3 sharing application, for the victim to download. The attacker then is notified upon the download or otherwise locates the vulnerability opened up by the buffer overflow.
  • Buffer Overflow via Symbolic Links
    This type of attack leverages the use of symbolic links to cause buffer overflows. An attacker can try to create or manipulate a symbolic link file such that its contents result in out of bounds data. When the target software processes the symbolic link file, it could potentially overflow internal buffers with insufficient bounds checking.
  • Overflow Variables and Tags
    This type of attack leverages the use of tags or variables from a formatted configuration data to cause buffer overflow. The attacker crafts a malicious HTML page or configuration file that includes oversized strings, thus causing an overflow.
  • Buffer Overflow via Parameter Expansion
    In this attack, the target software is given input that the attacker knows will be modified and expanded in size during processing. This attack relies on the target software failing to anticipate that the expanded data may exceed some internal limit, thereby creating a buffer overflow.
  • Buffer Overflow in an API Call
    This attack targets libraries or shared code modules which are vulnerable to buffer overflow attacks. An attacker who has access to an API may try to embed malicious code in the API function call and exploit a buffer overflow vulnerability in the function's implementation. All clients that make use of the code library thus become vulnerable by association. This has a very broad effect on security across a system, usually affecting more than one software process.
  • Buffer Overflow in Local Command-Line Utilities
    This attack targets command-line utilities available in a number of shells. An attacker can leverage a vulnerability found in a command-line utility to escalate privilege to root.
Access
VectorComplexityAuthentication
ADJACENT_NETWORK LOW NONE
Impact
ConfidentialityIntegrityAvailability
NONE NONE COMPLETE
exploit-db via4
description ISC DHCP 4.x Multiple Denial of Service Vulnerabilities. CVE-2012-3571. Dos exploit for linux platform
id EDB-ID:37538
last seen 2016-02-04
modified 2012-07-25
published 2012-07-25
reporter Markus Hietava
source https://www.exploit-db.com/download/37538/
title ISC DHCP 4.x Multiple Denial of Service Vulnerabilities
nessus via4
  • NASL family Debian Local Security Checks
    NASL id DEBIAN_DSA-2516.NASL
    description Two security vulnerabilities affecting ISC dhcpd, a server for automatic IP address assignment, in Debian have been discovered. - CVE-2012-3571 Markus Hietava of the Codenomicon CROSS project discovered that it is possible to force the server to enter an infinite loop via messages with malformed client identifiers. - CVE-2012-3954 Glen Eustace discovered that DHCP servers running in DHCPv6 mode and possibly DHCPv4 mode suffer of memory leaks while processing messages. An attacker can use this flaw to exhaust resources and perform denial of service attacks.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 60142
    published 2012-07-30
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=60142
    title Debian DSA-2516-1 : isc-dhcp - several vulnerabilities
  • NASL family Scientific Linux Local Security Checks
    NASL id SL_20120803_DHCP_ON_SL5_X.NASL
    description The Dynamic Host Configuration Protocol (DHCP) is a protocol that allows individual devices on an IP network to get their own network configuration information, including an IP address, a subnet mask, and a broadcast address. A denial of service flaw was found in the way the dhcpd daemon handled zero-length client identifiers. A remote attacker could use this flaw to send a specially crafted request to dhcpd, possibly causing it to enter an infinite loop and consume an excessive amount of CPU time. (CVE-2012-3571) Users of DHCP should upgrade to these updated packages, which contain a backported patch to correct this issue. After installing this update, all DHCP servers will be restarted automatically.
    last seen 2019-02-21
    modified 2018-12-31
    plugin id 61427
    published 2012-08-06
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=61427
    title Scientific Linux Security Update : dhcp on SL5.x i386/x86_64
  • NASL family Mandriva Local Security Checks
    NASL id MANDRIVA_MDVSA-2012-115.NASL
    description Multiple vulnerabilities has been discovered and corrected in ISC DHCP : An unexpected client identifier parameter can cause the ISC DHCP daemon to segmentation fault when running in DHCPv6 mode, resulting in a denial of service to further client requests. In order to exploit this condition, an attacker must be able to send requests to the DHCP server (CVE-2012-3570). An error in the handling of malformed client identifiers can cause a DHCP server running affected versions (see Impact) to enter a state where further client requests are not processed and the server process loops endlessly, consuming all available CPU cycles. Under normal circumstances this condition should not be triggered, but a non-conforming or malicious client could deliberately trigger it in a vulnerable server. In order to exploit this condition an attacker must be able to send requests to the DHCP server (CVE-2012-3571). Two memory leaks have been found and fixed in ISC DHCP. Both are reproducible when running in DHCPv6 mode (with the -6 command-line argument.) The first leak is confirmed to only affect servers operating in DHCPv6 mode, but based on initial code analysis the second may theoretically affect DHCPv4 servers (though this has not been demonstrated.) (CVE-2012-3954). The updated packages have been upgraded to the latest version (4.2.4-P1) which is not affected by these issues.
    last seen 2019-02-21
    modified 2019-01-02
    plugin id 61967
    published 2012-09-06
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=61967
    title Mandriva Linux Security Advisory : dhcp (MDVSA-2012:115)
  • NASL family FreeBSD Local Security Checks
    NASL id FREEBSD_PKG_C7FA3618D5FF11E190A2000C299B62E1.NASL
    description ISC reports : An unexpected client identifier parameter can cause the ISC DHCP daemon to segmentation fault when running in DHCPv6 mode, resulting in a denial of service to further client requests. In order to exploit this condition, an attacker must be able to send requests to the DHCP server. An error in the handling of malformed client identifiers can cause a DHCP server running affected versions (see 'Impact') to enter a state where further client requests are not processed and the server process loops endlessly, consuming all available CPU cycles. Under normal circumstances this condition should not be triggered, but a non-conforming or malicious client could deliberately trigger it in a vulnerable server. In order to exploit this condition an attacker must be able to send requests to the DHCP server. Two memory leaks have been found and fixed in ISC DHCP. Both are reproducible when running in DHCPv6 mode (with the -6 command-line argument.) The first leak is confirmed to only affect servers operating in DHCPv6 mode, but based on initial code analysis the second may theoretically affect DHCPv4 servers (though this has not been demonstrated.)
    last seen 2019-02-21
    modified 2018-12-19
    plugin id 60115
    published 2012-07-25
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=60115
    title FreeBSD : isc-dhcp -- multiple vulnerabilities (c7fa3618-d5ff-11e1-90a2-000c299b62e1)
  • NASL family Oracle Linux Local Security Checks
    NASL id ORACLELINUX_ELSA-2012-1140.NASL
    description From Red Hat Security Advisory 2012:1140 : Updated dhcp packages that fix one security issue are now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section. The Dynamic Host Configuration Protocol (DHCP) is a protocol that allows individual devices on an IP network to get their own network configuration information, including an IP address, a subnet mask, and a broadcast address. A denial of service flaw was found in the way the dhcpd daemon handled zero-length client identifiers. A remote attacker could use this flaw to send a specially crafted request to dhcpd, possibly causing it to enter an infinite loop and consume an excessive amount of CPU time. (CVE-2012-3571) Upstream acknowledges Markus Hietava of the Codenomicon CROSS project as the original reporter of this issue. Users of DHCP should upgrade to these updated packages, which contain a backported patch to correct this issue. After installing this update, all DHCP servers will be restarted automatically.
    last seen 2019-02-21
    modified 2018-07-18
    plugin id 68593
    published 2013-07-12
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=68593
    title Oracle Linux 5 : dhcp (ELSA-2012-1140)
  • NASL family Red Hat Local Security Checks
    NASL id REDHAT-RHSA-2012-1140.NASL
    description Updated dhcp packages that fix one security issue are now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section. The Dynamic Host Configuration Protocol (DHCP) is a protocol that allows individual devices on an IP network to get their own network configuration information, including an IP address, a subnet mask, and a broadcast address. A denial of service flaw was found in the way the dhcpd daemon handled zero-length client identifiers. A remote attacker could use this flaw to send a specially crafted request to dhcpd, possibly causing it to enter an infinite loop and consume an excessive amount of CPU time. (CVE-2012-3571) Upstream acknowledges Markus Hietava of the Codenomicon CROSS project as the original reporter of this issue. Users of DHCP should upgrade to these updated packages, which contain a backported patch to correct this issue. After installing this update, all DHCP servers will be restarted automatically.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 61404
    published 2012-08-03
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=61404
    title RHEL 5 : dhcp (RHSA-2012:1140)
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2012-11079.NASL
    description This is security bugfix release fixing several vulnerabilities. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2018-11-28
    plugin id 61387
    published 2012-08-02
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=61387
    title Fedora 17 : dhcp-4.2.4-9.P1.fc17 (2012-11079)
  • NASL family CentOS Local Security Checks
    NASL id CENTOS_RHSA-2012-1140.NASL
    description Updated dhcp packages that fix one security issue are now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section. The Dynamic Host Configuration Protocol (DHCP) is a protocol that allows individual devices on an IP network to get their own network configuration information, including an IP address, a subnet mask, and a broadcast address. A denial of service flaw was found in the way the dhcpd daemon handled zero-length client identifiers. A remote attacker could use this flaw to send a specially crafted request to dhcpd, possibly causing it to enter an infinite loop and consume an excessive amount of CPU time. (CVE-2012-3571) Upstream acknowledges Markus Hietava of the Codenomicon CROSS project as the original reporter of this issue. Users of DHCP should upgrade to these updated packages, which contain a backported patch to correct this issue. After installing this update, all DHCP servers will be restarted automatically.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 61400
    published 2012-08-03
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=61400
    title CentOS 5 : dhcp (CESA-2012:1140)
  • NASL family OracleVM Local Security Checks
    NASL id ORACLEVM_OVMSA-2016-0058.NASL
    description The remote OracleVM system is missing necessary patches to address critical security updates : - exit(2) after sending DHCPDECLINE when dhclient has been started with '-1' (RHBZ #756490) - An error in the handling of malformed client identifiers can cause a denial-of-service condition in affected servers. (CVE-2012-3571, #843125) - Propagate libdhcp timeout to internal timeout_arg (RHBZ #736515) - A pair of defects cause the server to halt upon processing certain packets (CVE-2011-2748, CVE-2011-2749, #729881) - dhclient.conf(5), dhclient(8) mention that interface-mtu option is also requested by default (RHBZ #694264) - Better fix for CVE-2011-0997: making domain-name check more lenient (RHBZ #690577) - dhclient requests interface-mtu option by default (RHBZ #694264) - dhclient.conf(5) fix (RHBZ #585855) - Make dhcpd init script LSB compliant (RHBZ #610128) - Use PID for seeding the random number generator in dhclient (RHBZ #623953) - Add DHCRELAYARGS variable to /etc/sysconfig/dhcrelay (RHBZ #624965) - 'lease imbalance' messages are not logged unless rebalance was actually attempted (RHBZ #661939) - Explicitly clear the ARP cache and flush all addresses & routes instead of bringing the interface down (RHBZ #685048) - IPoIB support (RHBZ #660679) - dhclient: insufficient sanitization of certain DHCP response values (CVE-2011-0997, #690577) - A partner-down failover server no longer emits 'peer holds all free leases' if it is able to newly-allocate one of the peer's leases. (RHBZ #610219) - The server's 'by client-id' and 'by hardware address' hash table lists are now sorted according to the preference to re-allocate that lease to returning clients. This should eliminate pool starvation problems arising when 'INIT' clients were given new leases rather than presently active ones. (RHBZ #615995)
    last seen 2019-02-21
    modified 2018-07-24
    plugin id 91742
    published 2016-06-22
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=91742
    title OracleVM 3.2 : dhcp (OVMSA-2016-0058)
  • NASL family Red Hat Local Security Checks
    NASL id REDHAT-RHSA-2012-1141.NASL
    description Updated dhcp packages that fix three security issues are now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. The Dynamic Host Configuration Protocol (DHCP) is a protocol that allows individual devices on an IP network to get their own network configuration information, including an IP address, a subnet mask, and a broadcast address. A denial of service flaw was found in the way the dhcpd daemon handled zero-length client identifiers. A remote attacker could use this flaw to send a specially crafted request to dhcpd, possibly causing it to enter an infinite loop and consume an excessive amount of CPU time. (CVE-2012-3571) Two memory leak flaws were found in the dhcpd daemon. A remote attacker could use these flaws to cause dhcpd to exhaust all available memory by sending a large number of DHCP requests. (CVE-2012-3954) Upstream acknowledges Markus Hietava of the Codenomicon CROSS project as the original reporter of CVE-2012-3571, and Glen Eustace of Massey University, New Zealand, as the original reporter of CVE-2012-3954. Users of DHCP should upgrade to these updated packages, which contain backported patches to correct these issues. After installing this update, all DHCP servers will be restarted automatically.
    last seen 2019-02-21
    modified 2018-12-20
    plugin id 61405
    published 2012-08-03
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=61405
    title RHEL 6 : dhcp (RHSA-2012:1141)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_DHCP-8245.NASL
    description This update of dhcp fixed two security vulnerabilities : - Malformed client identifiers could cause a Denial of Service (excessive CPU consumption), effectively causing further client requests to not be processed anymore. (CVE-2012-3571) - Two unspecified memory leaks. (CVE-2012-3954)
    last seen 2019-02-21
    modified 2012-08-20
    plugin id 61595
    published 2012-08-20
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=61595
    title SuSE 10 Security Update : dhcp (ZYPP Patch Number 8245)
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2012-11110.NASL
    description This is security bugfix release fixing several vulnerabilities. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2015-10-20
    plugin id 61442
    published 2012-08-07
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=61442
    title Fedora 16 : dhcp-4.2.3-11.P2.fc16 (2012-11110)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_11_DHCP-120813.NASL
    description This update of dhcp fixes two security vulnerabilities : - Malformed client identifiers could cause a Denial of Service (excessive CPU consumption), effectively causing further client requests to not be processed anymore. (CVE-2012-3571) - Two unspecified memory leaks. (CVE-2012-3954) Additionally, the following issues were fixed : - The init script of dhcp-server was fixed to check syntax and fail on force-reload and restart to avoid stopping of running daemon followed by start failure - Added libgcc_s.so to chroot, so the server can report an assert/crash line.
    last seen 2019-02-21
    modified 2013-10-25
    plugin id 64123
    published 2013-01-25
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=64123
    title SuSE 11.1 Security Update : dhcp (SAT Patch Number 6671)
  • NASL family SuSE Local Security Checks
    NASL id SUSE_11_DHCP-120730.NASL
    description This update provides dhcp 4.2.4-p1, which fixes the dhcpv6 server crashing while accessing the lease on heap and provides the following additional fixes : - Security fixes : - Previously the server code was relaxed to allow packets with zero length client ids to be processed. Under some situations use of zero length client ids can cause the server to go into an infinite loop. As such ids are not valid according to RFC 2132 section 9.14 the server no longer accepts them. Client ids with a length of 1 are also invalid but the server still accepts them in order to minimize disruption. The restriction will likely be tightened in the future to disallow ids with a length of 1. (ISC-Bugs #29851, CVE-2012-3571) - When attempting to convert a DUID from a client id option into a hardware address handle unexpected client ids properly. (ISC-Bugs #29852, CVE-2012-3570) - A pair of memory leaks were found and fixed. (ISC-Bugs #30024, (CVE-2012-3954) ) - Further upstream fixes : - Moved lease file check to a separate action so it is not used in restart -- it can fail when the daemon rewrites the lease causing a restart failure then. - Request dhcp6.sntp-servers in /etc/dhclient6.conf and forward to netconfig for processing. - Rotate the lease file when running in v6 mode. (ISC-Bugs #24887) - Fixed the code that checks if an address the server is planning to hand out is in a reserved range. This would appear as the server being out of addresses in pools with particular ranges. (ISC-Bugs #26498) - In the DDNS code handle error conditions more gracefully and add more logging code. The major change is to handle unexpected cancel events from the DNS client code. (ISC-Bugs #26287) - Tidy up the receive calls and eliminate the need for found_pkt. (ISC-Bugs #25066) - Add support for Infiniband over sockets to the server and relay code. - Modify the code that determines if an outstanding DDNS request should be cancelled. This patch results in cancelling the outstanding request less often. It fixes the problem caused by a client doing a release where the TXT and PTR records weren't removed from the DNS. (ISC-BUGS #27858) - Remove outdated note in the description of the bootp keyword about the option not satisfying the requirement of failover peers for denying dynamic bootp clients. (ISC-bugs #28574) - Multiple items to clean up IPv6 address processing. When processing an IA that we've seen check to see if the addresses are usable (not in use by somebody else) before handing it out. When reading in leases from the file discard expired addresses. When picking an address for a client include the IA ID in addition to the client ID to generally pick different addresses for different IAs. (ISC-Bugs #23138, #27945, #25586, #27684) - Remove unnecessary checks in the lease query code and clean up several compiler issues (some dereferences of NULL and treating an int as a boolean). (ISC-Bugs #26203) - Fix the NA and PD allocation code to handle the case where a client provides a preference and the server doesn't have any addresses or prefixes available. Previoulsy the server ignored the request with this patch it replies with a NoAddrsAvail or NoPrefixAvail response. By default the code performs according to the errata of August 2010 for RFC 3315 section 17.2.2; to enable the previous style see the section on RFC3315_PRE_ERRATA_2010_08 in includes/site.h. - Fix up some issues found by static analysis. A potential memory leak and NULL dereference in omapi. The use of a boolean test instead of a bitwise test in dst. (ISC-Bugs #28941) In addition, the dhcp-server init script now checks the syntax prior restarting the daemon to avoid stopping of the daemon when a start would fail.
    last seen 2019-02-21
    modified 2013-10-25
    plugin id 64122
    published 2013-01-25
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=64122
    title SuSE 11.2 Security Update : dhcp (SAT Patch Number 6606)
  • NASL family SuSE Local Security Checks
    NASL id OPENSUSE-2012-522.NASL
    description This update of dhcp fixed multiple security vulnerabilities (memory leak, Denial of Service).
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 74718
    published 2014-06-13
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=74718
    title openSUSE Security Update : dhcp (openSUSE-SU-2012:1006-1)
  • NASL family Gentoo Local Security Checks
    NASL id GENTOO_GLSA-201301-06.NASL
    description The remote host is affected by the vulnerability described in GLSA-201301-06 (ISC DHCP: Denial of Service) Multiple vulnerabilities have been discovered in ISC DHCP. Please review the CVE identifiers referenced below for details. Impact : The vulnerabilities might allow remote attackers to execute arbitrary code or cause a Denial of Service. Workaround : There is no known workaround at this time.
    last seen 2019-02-21
    modified 2018-07-11
    plugin id 63440
    published 2013-01-09
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=63440
    title GLSA-201301-06 : ISC DHCP: Denial of Service
  • NASL family Solaris Local Security Checks
    NASL id SOLARIS11_ISC-DHCP_20120821.NASL
    description The remote Solaris system is missing necessary patches to address security updates : - ISC DHCP 4.1.2 through 4.2.4 and 4.1-ESV before 4.1-ESV-R6 allows remote attackers to cause a denial of service (infinite loop and CPU consumption) via a malformed client identifier. (CVE-2012-3571) - Multiple memory leaks in ISC DHCP 4.1.x and 4.2.x before 4.2.4-P1 and 4.1-ESV before 4.1-ESV-R6 allow remote attackers to cause a denial of service (memory consumption) by sending many requests. (CVE-2012-3954)
    last seen 2019-02-21
    modified 2018-11-15
    plugin id 80647
    published 2015-01-19
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=80647
    title Oracle Solaris Third-Party Patch Update : isc-dhcp (multiple_denial_of_service_dos4)
  • NASL family Oracle Linux Local Security Checks
    NASL id ORACLELINUX_ELSA-2012-1141.NASL
    description From Red Hat Security Advisory 2012:1141 : Updated dhcp packages that fix three security issues are now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. The Dynamic Host Configuration Protocol (DHCP) is a protocol that allows individual devices on an IP network to get their own network configuration information, including an IP address, a subnet mask, and a broadcast address. A denial of service flaw was found in the way the dhcpd daemon handled zero-length client identifiers. A remote attacker could use this flaw to send a specially crafted request to dhcpd, possibly causing it to enter an infinite loop and consume an excessive amount of CPU time. (CVE-2012-3571) Two memory leak flaws were found in the dhcpd daemon. A remote attacker could use these flaws to cause dhcpd to exhaust all available memory by sending a large number of DHCP requests. (CVE-2012-3954) Upstream acknowledges Markus Hietava of the Codenomicon CROSS project as the original reporter of CVE-2012-3571, and Glen Eustace of Massey University, New Zealand, as the original reporter of CVE-2012-3954. Users of DHCP should upgrade to these updated packages, which contain backported patches to correct these issues. After installing this update, all DHCP servers will be restarted automatically.
    last seen 2019-02-21
    modified 2018-07-18
    plugin id 68594
    published 2013-07-12
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=68594
    title Oracle Linux 6 : dhcp (ELSA-2012-1141)
  • NASL family Scientific Linux Local Security Checks
    NASL id SL_20120803_DHCP_ON_SL6_X.NASL
    description The Dynamic Host Configuration Protocol (DHCP) is a protocol that allows individual devices on an IP network to get their own network configuration information, including an IP address, a subnet mask, and a broadcast address. A denial of service flaw was found in the way the dhcpd daemon handled zero-length client identifiers. A remote attacker could use this flaw to send a specially crafted request to dhcpd, possibly causing it to enter an infinite loop and consume an excessive amount of CPU time. (CVE-2012-3571) Two memory leak flaws were found in the dhcpd daemon. A remote attacker could use these flaws to cause dhcpd to exhaust all available memory by sending a large number of DHCP requests. (CVE-2012-3954) Users of DHCP should upgrade to these updated packages, which contain backported patches to correct these issues. After installing this update, all DHCP servers will be restarted automatically.
    last seen 2019-02-21
    modified 2018-12-31
    plugin id 61428
    published 2012-08-06
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=61428
    title Scientific Linux Security Update : dhcp on SL6.x i386/x86_64
  • NASL family Ubuntu Local Security Checks
    NASL id UBUNTU_USN-1519-1.NASL
    description Markus Hietava discovered that the DHCP server incorrectly handled certain malformed client identifiers. A remote attacker could use this issue to cause DHCP to crash, resulting in a denial of service. (CVE-2012-3571) Glen Eustace discovered that the DHCP server incorrectly handled memory. A remote attacker could use this issue to cause DHCP to crash, resulting in a denial of service. (CVE-2012-3954). Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen 2019-02-21
    modified 2018-12-01
    plugin id 60137
    published 2012-07-27
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=60137
    title Ubuntu 11.04 / 11.10 / 12.04 LTS : isc-dhcp vulnerabilities (USN-1519-1)
  • NASL family Amazon Linux Local Security Checks
    NASL id ALA_ALAS-2012-115.NASL
    description A denial of service flaw was found in the way the dhcpd daemon handled zero-length client identifiers. A remote attacker could use this flaw to send a specially crafted request to dhcpd, possibly causing it to enter an infinite loop and consume an excessive amount of CPU time. (CVE-2012-3571) Two memory leak flaws were found in the dhcpd daemon. A remote attacker could use these flaws to cause dhcpd to exhaust all available memory by sending a large number of DHCP requests. (CVE-2012-3954)
    last seen 2019-02-21
    modified 2018-04-18
    plugin id 69605
    published 2013-09-04
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=69605
    title Amazon Linux AMI : dhcp (ALAS-2012-115)
  • NASL family Debian Local Security Checks
    NASL id DEBIAN_DSA-2519.NASL
    description Several security vulnerabilities affecting ISC dhcpd, a server for automatic IP address assignment, have been discovered. Additionally, the latest security update for isc-dhcp, DSA-2516-1, did not properly apply the patches for CVE-2012-3571 and CVE-2012-3954. This has been addressed in this additional update. - CVE-2011-4539 BlueCat Networks discovered that it is possible to crash DHCP servers configured to evaluate requests with regular expressions via crafted DHCP request packets. - CVE-2012-3571 Markus Hietava of the Codenomicon CROSS project discovered that it is possible to force the server to enter an infinite loop via messages with malformed client identifiers. - CVE-2012-3954 Glen Eustace discovered that DHCP servers running in DHCPv6 mode and possibly DHCPv4 mode suffer of memory leaks while processing messages. An attacker can use this flaw to exhaust resources and perform denial of service attacks.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 61382
    published 2012-08-02
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=61382
    title Debian DSA-2519-2 : isc-dhcp - several vulnerabilities
  • NASL family CentOS Local Security Checks
    NASL id CENTOS_RHSA-2012-1141.NASL
    description Updated dhcp packages that fix three security issues are now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. The Dynamic Host Configuration Protocol (DHCP) is a protocol that allows individual devices on an IP network to get their own network configuration information, including an IP address, a subnet mask, and a broadcast address. A denial of service flaw was found in the way the dhcpd daemon handled zero-length client identifiers. A remote attacker could use this flaw to send a specially crafted request to dhcpd, possibly causing it to enter an infinite loop and consume an excessive amount of CPU time. (CVE-2012-3571) Two memory leak flaws were found in the dhcpd daemon. A remote attacker could use these flaws to cause dhcpd to exhaust all available memory by sending a large number of DHCP requests. (CVE-2012-3954) Upstream acknowledges Markus Hietava of the Codenomicon CROSS project as the original reporter of CVE-2012-3571, and Glen Eustace of Massey University, New Zealand, as the original reporter of CVE-2012-3954. Users of DHCP should upgrade to these updated packages, which contain backported patches to correct these issues. After installing this update, all DHCP servers will be restarted automatically.
    last seen 2019-02-21
    modified 2018-11-10
    plugin id 61437
    published 2012-08-07
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=61437
    title CentOS 6 : dhcp (CESA-2012:1141)
packetstorm via4
data source https://packetstormsecurity.com/files/download/115094/dhcp412-dos.txt
id PACKETSTORM:115094
last seen 2016-12-05
published 2012-07-29
reporter K1P0D
source https://packetstormsecurity.com/files/115094/SC-DHCP-4.1.2-Denial-Of-Service.html
title SC DHCP 4.1.2 Denial Of Service
redhat via4
advisories
  • bugzilla
    id 842420
    title CVE-2012-3571 dhcp: DoS due to error in handling malformed client identifiers
    oval
    AND
    • comment Red Hat Enterprise Linux 5 is installed
      oval oval:com.redhat.rhba:tst:20070331001
    • OR
      • AND
        • comment dhclient is earlier than 12:3.0.5-31.el5_8.1
          oval oval:com.redhat.rhsa:tst:20121140010
        • comment dhclient is signed with Red Hat redhatrelease key
          oval oval:com.redhat.rhsa:tst:20110428028
      • AND
        • comment dhcp is earlier than 12:3.0.5-31.el5_8.1
          oval oval:com.redhat.rhsa:tst:20121140002
        • comment dhcp is signed with Red Hat redhatrelease key
          oval oval:com.redhat.rhsa:tst:20110428020
      • AND
        • comment dhcp-devel is earlier than 12:3.0.5-31.el5_8.1
          oval oval:com.redhat.rhsa:tst:20121140006
        • comment dhcp-devel is signed with Red Hat redhatrelease key
          oval oval:com.redhat.rhsa:tst:20110428024
      • AND
        • comment libdhcp4client is earlier than 12:3.0.5-31.el5_8.1
          oval oval:com.redhat.rhsa:tst:20121140008
        • comment libdhcp4client is signed with Red Hat redhatrelease key
          oval oval:com.redhat.rhsa:tst:20110428022
      • AND
        • comment libdhcp4client-devel is earlier than 12:3.0.5-31.el5_8.1
          oval oval:com.redhat.rhsa:tst:20121140004
        • comment libdhcp4client-devel is signed with Red Hat redhatrelease key
          oval oval:com.redhat.rhsa:tst:20110428026
    rhsa
    id RHSA-2012:1140
    released 2012-08-03
    severity Moderate
    title RHSA-2012:1140: dhcp security update (Moderate)
  • rhsa
    id RHSA-2012:1141
rpms
  • dhclient-12:3.0.5-31.el5_8.1
  • dhcp-12:3.0.5-31.el5_8.1
  • dhcp-devel-12:3.0.5-31.el5_8.1
  • libdhcp4client-12:3.0.5-31.el5_8.1
  • libdhcp4client-devel-12:3.0.5-31.el5_8.1
  • dhclient-12:4.1.1-31.P1.el6_3.1
  • dhcp-12:4.1.1-31.P1.el6_3.1
  • dhcp-common-12:4.1.1-31.P1.el6_3.1
  • dhcp-devel-12:4.1.1-31.P1.el6_3.1
refmap via4
bid 54665
confirm
debian
  • DSA-2516
  • DSA-2519
gentoo GLSA-201301-06
mandriva
  • MDVSA-2012:115
  • MDVSA-2012:116
suse openSUSE-SU-2012:1006
ubuntu USN-1519-1
Last major update 30-12-2016 - 21:59
Published 25-07-2012 - 06:42
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