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TITLE:
Vim "helptags" Command Format String Vulnerability

SECUNIA ADVISORY ID:
SA25941

VERIFY ADVISORY:
http://secunia.com/advisories/25941/

CRITICAL:
Less critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
Vim 6.x
http://secunia.com/product/2919/
Vim 7.x
http://secunia.com/product/13401/

DESCRIPTION:
Secunia Research has discovered a vulnerability in Vim, which can be
exploited by malicious people to compromise a vulnerable system.

A format string error in the "helptags_one()" function in
src/ex_cmds.c when running the "helptags" command can be exploited to
execute arbitrary code via specially crafted help files.

Successful exploitation requires that the user is tricked into
running "helptags" on malicious data.

The vulnerability is confirmed in versions 6.4 and 7.1. Other
versions may also be affected.

SOLUTION:
Apply the vendor's official patch:
ftp://ftp.vim.org/pub/vim/patches/7.1/7.1.039

Do not run "helptags" on untrusted data.

PROVIDED AND/OR DISCOVERED BY:
Ulf Harnhammar, Secunia Research.

ORIGINAL ADVISORY:
Secunia Research:
http://secunia.com/secunia_research/2007-66/advisory/

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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.

Subscribe:
http://secunia.com/secunia_security_advisories/

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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