TITLE: GIT "git-checkout-index" Symbolic Link Handling Buffer Overflow
SECUNIA ADVISORY ID: SA18643
VERIFY ADVISORY: http://secunia.com/advisories/18643/
CRITICAL: Moderately critical
IMPACT: System access
WHERE: >From remote
SOFTWARE: GIT 1.x http://secunia.com/product/7172/
DESCRIPTION: A vulnerability has been reported in GIT, which potentially can be exploited by malicious people to compromise a user's system.
The vulnerability is caused due to a boundary error in "git-checkout-index" in the handling of an overly long symbolic link. This can be exploited to cause a stack-based buffer overflow and may allow execution of arbitrary code when the user performs a checkout.
Successful exploitation requires that a blob record with a specially-crafted symbolic link exists in the index, e.g. after merging with non-trusted sources.
The vulnerability has been reported in version 1.1.4. Prior versions may also be affected.
SOLUTION: Update to version 1.1.5 or later. http://www.kernel.org/pub/software/scm/git/
PROVIDED AND/OR DISCOVERED BY: The vendor credits Mark Wooding.
ORIGINAL ADVISORY: http://lwn.net/Articles/169623/
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