#VU33847 Input validation error in libXfont - CVE-2014-0209

Vulnerability identifier: #VU33847

Vulnerability risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2014-0209

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libXfont
Universal components / Libraries / Libraries used by multiple products

Vendor: X.org

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

Multiple integer overflows in the (1) FontFileAddEntry and (2) lexAlias functions in X.Org libXfont before 1.4.8 and 1.4.9x before 1.4.99.901 might allow local users to gain privileges by adding a directory with a large fonts.dir or fonts.alias file to the font path, which triggers a heap-based buffer overflow, related to metadata.

Mitigation
Install update from vendor's website.

Vulnerable software versions

libXfont: 1.4.0 - 1.4.7

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External links
https://advisories.mageia.org/MGASA-2014-0278.html
https://lists.opensuse.org/opensuse-updates/2014-05/msg00073.html
https://lists.x.org/archives/xorg-announce/2014-May/002431.html
https://rhn.redhat.com/errata/RHSA-2014-1893.html
https://seclists.org/fulldisclosure/2014/Dec/23
https://secunia.com/advisories/59154
https://www.debian.org/security/2014/dsa-2927
https://www.mandriva.com/security/advisories?name=MDVSA-2015:145
https://www.oracle.com/technetwork/topics/security/cpujul2014-1972956.html
https://www.securityfocus.com/archive/1/534161/100/0/threaded
https://www.securityfocus.com/bid/67382
https://www.ubuntu.com/usn/USN-2211-1
https://www.vmware.com/security/advisories/VMSA-2014-0012.html

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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.