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TITLE:
zlib "inftrees.c" Buffer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA15949

VERIFY ADVISORY:
http://secunia.com/advisories/15949/

CRITICAL:
Highly critical

IMPACT:
DoS, System access

WHERE:
>From remote

SOFTWARE:
zlib 1.x
http://secunia.com/product/3847/

DESCRIPTION:
A vulnerability has been reported in zlib, which can be exploited by
malicious people to conduct a DoS (Denial of Service) against a
vulnerable application, or potentially to execute arbitrary code.

The vulnerability is caused due to a boundary error in "inftrees.c"
when handling corrupted compressed data streams. This can be
exploited to crash any application that uses the zlib library, or
potentially to execute arbitrary code with privileges of the
vulnerable application.

The vulnerability has been reported in version 1.2.2. Prior versions
may also be affected.

SOLUTION:
No updates are currently available from the vendor.

Several Linux distributions have issued updated packages.

PROVIDED AND/OR DISCOVERED BY:
Tavis Ormandy, Gentoo Linux Security Audit Team

ORIGINAL ADVISORY:
Gentoo:
http://www.gentoo.org/security/en/glsa/glsa-200507-05.xml

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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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