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Secunia Advisory SA40691

Linux Kernel CIFS DNS Lookup Keyring Cache Poisoning Vulnerability
Secunia Advisory SA40691
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Release Date 2010-07-23
Last Update 2010-08-02
   
Popularity 2,817 views
Comments 0 comments

Criticality level Less criticalLess critical
Impact Security Bypass
Spoofing
Where Local system
Authentication level Available in Customer Area
   
Report reliability Available in Customer Area
Solution Status Vendor Patch
   
Systems affected Available in Customer Area
Approve distribution Available in Customer Area
   
Operating System
Linux Kernel 2.6.x
Secunia CVSS Score Available in Customer Area
CVE Reference(s) CVE-2010-2524 CVSS available in Customer Area
  

Description

A vulnerability has been reported in the Linux Kernel, which can be exploited by malicious, local users to conduct DNS cache poisoning attacks.

The vulnerability is caused due to the CIFS DNS resolver mechanism not properly restricting access to the keyring storing lookup results, which can be exploited to e.g. trick the system into mounting from a malicious server by inserting spoofed lookup results.


Solution
Update to version 2.6.35.

Provided and/or discovered by
Disclosed in a GIT commit.

Changelog
Further details available in Customer Area

Original Advisory
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=4c0c03ca54f72fdd5912516ad0a23ec5cf01bda7

Deep Links
Links available in Customer Area


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 CIFS DNS Lookup Keyring Cache Poisoning Vulnerability
 
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