Debian DLA-218-1 : xorg-server security update

medium Nessus Plugin ID 83190

Synopsis

The remote Debian host is missing a security update.

Description

Olivier Fourdan discovered that missing input validation in the Xserver's handling of XkbSetGeometry requests may result in an information leak or denial of service.

This upload to Debian squeeze-lts fixes the issue by not swapping XkbSetGeometry data in the input buffer any more and checking strings' length against request size.

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

Solution

Upgrade the affected packages.

See Also

https://lists.debian.org/debian-lts-announce/2015/05/msg00001.html

https://packages.debian.org/source/squeeze-lts/xorg-server

Plugin Details

Severity: Medium

ID: 83190

File Name: debian_DLA-218.nasl

Version: 2.8

Type: local

Agent: unix

Published: 5/4/2015

Updated: 1/11/2021

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Nessus Agent

Risk Information

VPR

Risk Factor: Medium

Score: 5.2

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:xdmx, p-cpe:/a:debian:debian_linux:xdmx-tools, p-cpe:/a:debian:debian_linux:xnest, p-cpe:/a:debian:debian_linux:xserver-common, p-cpe:/a:debian:debian_linux:xserver-xephyr, p-cpe:/a:debian:debian_linux:xserver-xfbdev, p-cpe:/a:debian:debian_linux:xserver-xorg-core, p-cpe:/a:debian:debian_linux:xserver-xorg-core-dbg, p-cpe:/a:debian:debian_linux:xserver-xorg-core-udeb, p-cpe:/a:debian:debian_linux:xserver-xorg-dev, p-cpe:/a:debian:debian_linux:xvfb, cpe:/o:debian:debian_linux:6.0

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/1/2015

Reference Information

CVE: CVE-2015-0255

BID: 72578