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Insecure Library Loading
Not critical

Linux Kernel "install_special_mapping()" mmap_min_addr Security Bypass Weakness

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Release Date:  2010-12-10    Last Update:  2011-01-10    Views:  3,037

Secunia Advisory SA42570

Where:

Local system

Impact:

Security Bypass

Solution Status:

Vendor Patch

Operating System:

CVE Reference(s):

Description


A weakness has been reported in the Linux Kernel, which can be exploited by malicious, local users to bypass certain security restrictions.

The weakness is caused due to the "install_special_mapping()" function in mm/mmap.c not properly restricting mappings below the limit set via the "mmap_min_addr" sysctl, which can be exploited to map memory into forbidden areas.


Solution:
Update to version 2.6.32.28, 2.6.36.3, or 2.6.37.

Provided and/or discovered by:
Tavis Ormandy

Original Advisory:
http://www.openwall.com/lists/oss-security/2010/12/09/12
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=462e635e5b73ba9a4c03913b77138cd57ce4b050

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 "install_special_mapping()" mmap_min_addr Security Bypass Weakness<

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