Debian DLA-654-1 : libxfixes security update

critical Nessus Plugin ID 94075

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Synopsis

The remote Debian host is missing a security update.

Description

It was discovered that there was a integer overflow in libxfixes, a library providing a client interface to the X11 'XFIXES' extension.

The 32 bit field 'rep.length' was not checked for validity, which allowed an integer overflow on 32 bit systems. A malicious server could send INT_MAX as 'length' which was then multiplied by the size of XRectangle. In this case the client would not read the whole data from server, getting out of sync.

For Debian 7 'Wheezy', this issue has been fixed in libxfixes version 1:5.0-4+deb7u2.

We recommend that you upgrade your libxfixes packages.

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.

Plugin Details

Severity: Critical

ID: 94075

File Name: debian_DLA-654.nasl

Version: 2.7

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 10/17/2016

Updated: 1/11/2021

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

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

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:7.0, p-cpe:/a:debian:debian_linux:libxfixes3-udeb, p-cpe:/a:debian:debian_linux:libxfixes3, p-cpe:/a:debian:debian_linux:libxfixes3-dbg, p-cpe:/a:debian:debian_linux:libxfixes-dev

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

Exploit Ease: No known exploits are available

Patch Publication Date: 10/14/2016

Reference Information

CVE: CVE-2016-7944

Detections

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