#VU33314 Buffer overflow in libx11 - CVE-2013-2004

Vulnerability identifier: #VU33314

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2013-2004

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libx11
Other software / Other software solutions

Vendor: xorg.freedesktop.org

Description

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

The (1) GetDatabase and (2) _XimParseStringFile functions in X.org libX11 1.5.99.901 (1.6 RC1) and earlier do not restrict the recursion depth when processing directives to include files, which allows X servers to cause a denial of service (stack consumption) via a crafted file.

Mitigation
Install update from vendor's website.

Vulnerable software versions

libx11: 1.5.99.901

---

External links
https://www.debian.org/security/2013/dsa-2693
https://www.openwall.com/lists/oss-security/2013/05/23/3
https://www.ubuntu.com/usn/USN-1854-1
https://www.x.org/wiki/Development/Security/Advisory-2013-05-23

---

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.