||Heap-based buffer overflow in OpenConnect 3.18 allows remote servers to cause a denial of service via a crafted greeting banner.
infradead OpenConnect 1.00
infradead OpenConnect 1.10
infradead OpenConnect 1.20
infradead OpenConnect 1.30
infradead OpenConnect 1.40
infradead OpenConnect 2.00
infradead OpenConnect 2.01
infradead OpenConnect 2.10
infradead OpenConnect 2.11
infradead OpenConnect 2.12
infradead OpenConnect 2.20
infradead OpenConnect 2.21
infradead OpenConnect 2.22
infradead OpenConnect 2.23
infradead OpenConnect 2.24
infradead OpenConnect 2.25
infradead OpenConnect 2.26
infradead OpenConnect 3.00
infradead OpenConnect 3.01
infradead OpenConnect 3.02
infradead OpenConnect 3.11
infradead OpenConnect 3.12
infradead OpenConnect 3.13
infradead OpenConnect 3.14
infradead OpenConnect 3.15
infradead OpenConnect 3.16
infradead OpenConnect 3.17
|Base: ||7.8 (as of 08-06-2012 - 12:41)|
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.
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).
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.
|NASL family||Fedora Local Security Checks |
|NASL id||FEDORA_2012-6758.NASL |
|description||This update fixes a potential buffer overrun when handling the greeting banner from the server. This update fixes a potential crash when processing libproxy results, and introduces some performance improvement
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 |
|plugin id||59005 |
|title||Fedora 16 : openconnect-3.18-1.fc16 (2012-6758) |
|NASL family||Debian Local Security Checks |
|NASL id||DEBIAN_DSA-2495.NASL |
|description||A buffer overflow was discovered in OpenConnect, a client for the Cisco AnyConnect VPN, which could result in denial of service. |
|last seen||2019-02-21 |
|plugin id||59773 |
|title||Debian DSA-2495-1 : openconnect - buffer overflow |
|NASL family||SuSE Local Security Checks |
|NASL id||OPENSUSE-2013-529.NASL |
|description||This openconnect update to version 3.20 includes several security and bug fixes.
- fix bnc#767616
- fix for CVE-2012-3291
- make vpnc mandatory during build, following upstream changes
- package documentation in a -doc package
- Update to version 3.20
- Cope with non-keepalive HTTP response on authentication success.
- Fix progress callback with incorrect cbdata which caused KDE crash.
- Update to version 3.19
- Enable native TPM support when built with GnuTLS.
- Enable PKCS#11 token support when built with GnuTLS.
- Eliminate all SSL library exposure through libopenconnect.
- Parse split DNS information, provide $CISCO_SPLIT_DNS environment variable to vpnc-script.
- Attempt to provide new-style MTU information to server (on Linux only, unless specified on command line).
- Allow building against GnuTLS, including DTLS support.
- Add --with-pkgconfigdir= option to configure for FreeBSD's benefit (fd#48743).
- Update to version 3.18
- Fix autohate breakage with --disable-nls... hopefully.
- Fix buffer overflow in banner handling.
- Update to version 3.17
- Work around time() brokenness on Solaris.
- Fix interface plumbing on Solaris 10.
- Provide asprintf() function for (unpatched) Solaris 10.
- Make vpnc-script mandatory, like it is for vpnc
- Don't set Legacy IP address on tun device; let vpnc-script do it.
- Detect OpenSSL even without pkg-config.
- Stop building static library by default.
- Invoke vpnc-script with 'pre-init' reason to load tun module if necessary.
- Update to version 3.16
- Fix build failure on Debian/kFreeBSD and Hurd.
- Fix memory leak of deflated packets.
- Fix memory leak of zlib state on CSTP reconnect.
- Eliminate memcpy() calls on packets from DTLS and tunnel device.
- Use I_LINK instead of I_PLINK on Solaris to plumb interface for Legacy IP.
- Plumb interface for IPv6 on Solaris, instead of expecting vpnc-script to do it.
- Refer to vpnc-script and help web pages in openconnect output.
- Fix potential crash when processing libproxy results.
- Be more conservative in detecting libproxy without pkg-config. |
|last seen||2019-02-21 |
|plugin id||75056 |
|title||openSUSE Security Update : openconnect (openSUSE-SU-2013:1072-1) |
|name||Maria Kedovskaya |
|name||Jerome Athias |
|organization||McAfee, Inc. |
|comment||openSUSE 12.2 is installed |
|description||Heap-based buffer overflow in OpenConnect 3.18 allows remote servers to cause a denial of service via a crafted greeting banner. |
|title||openconnect vulnerability |
|Last major update
||02-11-2013 - 23:25
||07-06-2012 - 16:55
||04-01-2018 - 21:29