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TITLE:
XnView Sun TAAC "format" Buffer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA30416

VERIFY ADVISORY:
http://secunia.com/advisories/30416/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
XnView 1.x
http://secunia.com/product/6705/

DESCRIPTION:
Secunia Research has discovered a vulnerability in XnView, which can
be exploited by malicious people to compromise a user's system.

The vulnerability is caused due to a boundary error when processing
the "format" keyword of Sun TAAC files. This can be exploited to
cause a stack-based buffer overflow by e.g. tricking a user into
viewing a specially crafted Sun TAAC file.

Successful exploitation allows execution of arbitrary code.

The vulnerability is confirmed in version 1.70 of XnView for Linux or
FreeBSD and XnView 1.93.6 for Windows.

SOLUTION:
XnView for Windows:
The vulnerability is fixed in version 1.94 beta1.

Do not open untrusted Sun TAAC files.

PROVIDED AND/OR DISCOVERED BY:
Stefan Cornelius, Secunia Research.

ORIGINAL ADVISORY:
Secunia Research:
http://secunia.com/secunia_research/2008-24/

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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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