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Linux Kernel Information Disclosure and Security Bypass

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Release Date:  2009-03-23    Last Update:  2009-04-17    Views:  6,156

Secunia Advisory SA34422

Where:

From local network

Impact:

Security Bypass, Exposure of system information, Exposure of sensitive information

Solution Status:

Vendor Patch

Operating System:

CVE Reference(s):

Description


Some security issues have been reported in the Linux Kernel, which can be exploited by malicious, local users to disclose potentially sensitive information and by malicious users to bypass certain security restrictions.

1) A security issue is caused due to an error when storing eCryptfs headers, which can be exploited to disclose certain kernel memory.

2) A security issue is caused due to nfsd not properly dropping the "CAP_MKNOD" capability for unprivileged users, which can be exploited to create device nodes.


Solution:
Update to version 2.6.27.21 or 2.6.28.9.

Provided and/or discovered by:
1) The vendor credits Florian Streibelt.
2) Igor Zhbanov

Original Advisory:
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.27.21
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.28.9

1) http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=8faece5f906725c10e7a1f6caf84452abadbdc7b
2) http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=76a67ec6fb79ff3570dcb5342142c16098299911
http://thread.gmane.org/gmane.linux.kernel/805280

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 Security Bypass

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