Input validation error in Pixman

1) Input validation error

EUVDB-ID: #VU33855

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2013-6425

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

Integer underflow in the pixman_trapezoid_valid macro in pixman.h in Pixman before 0.32.0, as used in X.Org server and cairo, allows context-dependent attackers to cause a denial of service (crash) via a negative bottom value.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Pixman: 0.9.6 - 0.30.2

External links

http://cgit.freedesktop.org/pixman/commit/?id=5e14da97f16e421d084a9e735be21b1025150f0c
http://lists.freedesktop.org/archives/pixman/2013-November/003109.html
http://lists.opensuse.org/opensuse-updates/2014-01/msg00001.html
http://lists.opensuse.org/opensuse-updates/2014-01/msg00005.html
http://lists.opensuse.org/opensuse-updates/2014-01/msg00008.html
http://lists.opensuse.org/opensuse-updates/2014-01/msg00097.html
http://rhn.redhat.com/errata/RHSA-2013-1869.html
http://www.debian.org/security/2013/dsa-2823
http://www.openwall.com/lists/oss-security/2013/12/03/8
http://www.openwall.com/lists/oss-security/2013/12/04/8
http://www.ubuntu.com/usn/USN-2047-1
http://bugs.freedesktop.org/show_bug.cgi?id=67484
http://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1197921

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.