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TITLE:
Mercurial "applydiff()" Directory Traversal Security Issue

SECUNIA ADVISORY ID:
SA31108

VERIFY ADVISORY:
http://secunia.com/advisories/31108/

CRITICAL:
Not critical

IMPACT:
Manipulation of data

WHERE:
>From remote

SOFTWARE:
Mercurial 1.x
http://secunia.com/product/19311/

DESCRIPTION:
A security issue has been reported in Mercurial, which can be
exploited by malicious people to manipulate certain data.

The security issue is caused due to an error within the "applydiff()"
function in mercurial/patch.py. This can be exploited to manipulate
arbitrary files placed outside the repository via directory traversal
attacks.

Successful exploitation requires that a user is tricked into
importing a malicious patch.

The security issue is reported in version 1.0.1. Other versions may
also be affected.

SOLUTION:
Fixed in the development repository.
http://www.selenic.com/hg/rev/87c704ac92d4

PROVIDED AND/OR DISCOVERED BY:
Gentoo credits Jakub Wilk.

ORIGINAL ADVISORY:
http://bugs.gentoo.org/show_bug.cgi?id=230193

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

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Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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