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Linux Kernel Information Disclosure and Denial of Service

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Release Date:  2006-01-17    Last Update:  2006-01-31    Views:  14,184

Secunia Advisory SA18487

Where:

Local system

Impact:

Exposure of sensitive information, DoS

Solution Status:

Vendor Patch

Operating System:

CVE Reference(s):

Description


Two vulnerabilities have been reported in the Linux Kernel, which can be exploited by malicious, local users to disclose potentially sensitive information, and to cause a DoS (Denial of Service).

1) The "dm-crypt" driver fails to clear memory before freeing it. This can be exploited by local users to obtain sensitive information (e.g. cryptographic keys).

The vulnerability has been reported in version 2.6.15.1. Other versions may also be affected.

2) An error in the "mq_open" system call can cause the "mqueue_mnt->mnt_count" counter to be decremented twice when the "dentry_open" function call fails. This can potentially be exploited by malicious users to cause a kernel panic.


Solution:
Update to version 2.6.15.2.

Further details available to Secunia VIM customers

Provided and/or discovered by:
1) Stefan Rompf
2) Doug Chapman

Original Advisory:
Kernel.org:
http://www.kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.15-git12.log
http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.16-rc1
http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=9d3520a339d62f942085e9888f66905eb8b350bd
http://marc.theaimsgroup.com/?l=linux-kernel&m=113640535312572
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.15.2
http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=7c7dce9209161eb260cdf9e9172f72c3a02379e6

Red Hat Bugzilla:
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=169130

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 Information Disclosure and Denial of Service

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