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TITLE:
Linux Kernel eCryptfs Two Vulnerabilities

SECUNIA ADVISORY ID:
SA35985

VERIFY ADVISORY:
http://secunia.com/advisories/35985/

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:
Fixed in the GIT repository.

PROVIDED AND/OR DISCOVERED BY:
Ramon de Carvalho Valle

ORIGINAL ADVISORY:
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

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