#VU32591 Stack-based buffer overflow in libXfont - CVE-2013-6462
Vulnerability identifier: #VU32591
Vulnerability risk: High
CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID: CVE-2013-6462
CWE-ID:
CWE-121
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 attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error within the bdfReadCharacters function in bitmap/bdfread.c when processing a long string in a character name in a BDF font file. A remote unauthenticated attacker can trigger stack-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Mitigation
Update to version 1.4.7.
Vulnerable software versions
libXfont: 1.1.0 - 1.4.6
External links
https://cgit.freedesktop.org/xorg/lib/libXfont/commit/?id=4d024ac10f964f6bd372ae0dd14f02772a6e5f63
https://lists.opensuse.org/opensuse-updates/2014-01/msg00050.html
https://lists.opensuse.org/opensuse-updates/2014-01/msg00052.html
https://lists.x.org/archives/xorg-announce/2014-January/002389.html
https://osvdb.org/101842
https://rhn.redhat.com/errata/RHSA-2014-0018.html
https://seclists.org/oss-sec/2014/q1/33
https://secunia.com/advisories/56240
https://secunia.com/advisories/56336
https://secunia.com/advisories/56357
https://secunia.com/advisories/56371
https://www.debian.org/security/2014/dsa-2838
https://www.oracle.com/technetwork/topics/security/cpuapr2014-1972952.html
https://www.securityfocus.com/bid/64694
https://www.ubuntu.com/usn/USN-2078-1
https://exchange.xforce.ibmcloud.com/vulnerabilities/90123
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.
