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Linux Kernel Multiple Denial of Service Vulnerabilities

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Release Date:  2005-08-09    Last Update:  2005-09-27    Views:  18,227

Secunia Advisory SA16355

Where:

From remote

Impact:

DoS

Solution Status:

Vendor Patch

Operating System:

CVE Reference(s):

Description


Some vulnerabilities have been reported in the Linux kernel, which can be exploited by malicious, local users and potentially malicious people to cause a DoS (Denial of Service).

1) An error within the handling of keyrings makes it possible to crash the kernel when destroying a keyring that wasn't properly instantiated. This can be exploited by attempting to add a keyring that doesn't have an empty payload.

2) An error within the error handling path for the "KEYCTL_JOIN_SESSION_KEYRING" operation when attempting to join a key management session may cause the session management semaphore to not be released. This can be exploited by attempting to add a new session keyring.

3) Some errors in the in-kernel zlib routines can be exploited to cause a DoS via specially crafted input.

4) An error in the driver for compressed ISO file systems can be exploited to crash the kernel when e.g. a malicious CD-ROM with a specially crafted compressed ISO image is mounted.

5) A array type error in the "ipt_recent.c" netfilter module when calling "memset()" on the "last_pkts" array may cause the kernel to crash via certain attacks. e.g. SSH brute force. This only affects 64-bit platforms.


Solution:
Update to version 2.6.12.5.

Further details available to Secunia VIM customers

Provided and/or discovered by:
1-2) David Howells
4) Tim Yamin
5) Juergen Kreileder

Original Advisory:
Kernel.org:
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.12.5

Debian:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=322237

Juergen Kreileder:
http://blog.blackdown.de/2005/05/09/fixing-the-ipt_recent-netfilter-module/

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Linux Kernel Multiple Denial of Service Vulnerabilities

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