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TITLE:
xcftools "flattenIncrementally()" Buffer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA35397

VERIFY ADVISORY:
http://secunia.com/advisories/35397/

DESCRIPTION:
A vulnerability has been reported in xcftools, which can be exploited
by malicious people to potentially compromise a user's system.

The vulnerability is caused due to a boundary error within the
"flattenIncrementally()" function in flatten.c. This can be exploited
to cause a stack-based buffer overflow by tricking a user into e.g.
running the xcf2pnm utility with the "-C" or "-O" options against a
specially crafted image.

Successful exploitation may allow execution of arbitrary code.

The vulnerability is reported in version 1.0.4. Other versions may
also be affected.

SOLUTION:
Do not process untrusted files with xcftools.

PROVIDED AND/OR DISCOVERED BY:
Reported by Jorgen Grahn in a Debian bug report.

ORIGINAL ADVISORY:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=533361

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