NULL pointer dereference in FreeType

1) NULL pointer dereference

EUVDB-ID: #VU32696

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-2012-5668

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error. A remote attacker can trigger denial of service conditions via vectors related to BDF fonts and the improper handling of an "allocation error" in the bdf_free_font function.

Mitigation

Update to version 2.4.11.

Vulnerable software versions

FreeType: 2.4.0 - 2.4.10

External links

http://git.savannah.gnu.org/cgit/freetype/freetype2.git/commit/?id=9b6b5754b57c12b820e01305eb69b8863a161e5a
http://lists.opensuse.org/opensuse-updates/2013-01/msg00056.html
http://lists.opensuse.org/opensuse-updates/2013-01/msg00068.html
http://lists.opensuse.org/opensuse-updates/2013-01/msg00078.html
http://secunia.com/advisories/51826
http://secunia.com/advisories/51900
http://www.freetype.org/
http://www.openwall.com/lists/oss-security/2012/12/25/2
http://www.securitytracker.com/id?1027921
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2013&m=slackware-security.520186
http://www.ubuntu.com/usn/USN-1686-1
http://savannah.nongnu.org/bugs/?37905

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.