Ubuntu 12.04 LTS / 14.04 LTS / 14.10 : libx11, libxrender vulnerability (USN-2568-1)

High Nessus Plugin ID 82766


The remote Ubuntu host is missing one or more security-related patches.


Abhishek Arya discovered that libX11 incorrectly handled memory in the MakeBigReq macro. A remote attacker could use this issue to cause applications to crash, resulting in a denial of service, or possibly execute arbitrary code.

In addition, following the macro fix in libx11, a number of other packages have also been rebuilt as security updates including libxrender, libxext, libxi, libxfixes, libxrandr, libsdl1.2, libxv, libxp, and xserver-xorg-video-vmware.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.


Update the affected libx11-dev and / or libxrender1 packages.

Plugin Details

Severity: High

ID: 82766

File Name: ubuntu_USN-2568-1.nasl

Version: $Revision: 1.4 $

Type: local

Agent: unix

Published: 2015/04/14

Modified: 2016/05/24

Dependencies: 12634

Risk Information

Risk Factor: High


Base Score: 7.5

Temporal Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:libx11-dev, p-cpe:/a:canonical:ubuntu_linux:libxrender1, cpe:/o:canonical:ubuntu_linux:12.04:-:lts, cpe:/o:canonical:ubuntu_linux:14.04, cpe:/o:canonical:ubuntu_linux:14.10

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2015/04/13

Reference Information

CVE: CVE-2013-7439

OSVDB: 120543

USN: 2568-1