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Linux Kernel eCryptfs Two Vulnerabilities

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Release Date:  2009-07-29    Last Update:  2009-07-31    Views:  5,058

Secunia Advisory SA35985

Where:

From remote

Impact:

System access

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 people to potentially compromise a user's system.

1) A boundary error in the processing of tag 11 packets can be exploited to cause a stack-based buffer overflow via an eCryptfs file containing a specially crafted metadata section.

2) A boundary error in the "parse_tag_3_packet()" eCryptfs function can be exploited to cause a heap-based buffer overflow via a tag 3 packet containing an overly large encrypted key size.

Successful exploitation may allow execution of arbitrary code, but requires that a user is tricked into processing a specially crafted eCryptfs file.

The vulnerabilities are reported in version 2.6.30.3. Other versions may also be affected.


Solution:
Update to version 2.6.30.4.

Provided and/or discovered by:
Ramon de Carvalho Valle

Original Advisory:
Kernel.org:
http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.30.4

Linux Kernel GIT:
http://git.kernel.org/linus/6352a29305373ae6196491e6d4669f301e26492e
http://git.kernel.org/linus/f151cd2c54ddc7714e2f740681350476cda03a28

Ramon de Carvalho Valle:
http://risesecurity.org/advisories/RISE-2009002.txt
http://risesecurity.org/advisories/RISE-2009003.txt

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 eCryptfs Two Vulnerabilities

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