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Debian DLA-831-1 : gtk-vnc security update

critical Nessus Plugin ID 97236

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Synopsis

The remote Debian host is missing a security update.

Description

Josef Gajdusek discovered two vulnerabilities in gtk-vnc, a VNC viewer widget for GTK :

CVE-2017-5884

Fix bounds checking for RRE, hextile & copyrec encodings. This bug allowed a remote server to cause a denial of service by buffer overflow via a carefully crafted message containing subrectangles outside the drawing area.

CVE-2017-5885

Correctly validate color map range indexes. This bug allowed a remote server to cause a denial of service by buffer overflow via a carefully crafted message with out-of-range colour values.

For Debian 7 'Wheezy', these problems have been fixed in version 0.5.0-3.1+deb7u1.

We recommend that you upgrade your gtk-vnc 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.

See Also

https://lists.debian.org/debian-lts-announce/2017/02/msg00020.html

https://packages.debian.org/source/wheezy/gtk-vnc

Plugin Details

Severity: Critical

ID: 97236

File Name: debian_DLA-831.nasl

Version: 3.7

Type: local

Agent: unix

Published: 2/21/2017

Updated: 1/11/2021

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

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: p-cpe:/a:debian:debian_linux:libgtk-vnc-2.0-0-dbg, p-cpe:/a:debian:debian_linux:libgvnc-1.0-dev, p-cpe:/a:debian:debian_linux:libgvnc-1.0-0-dbg, cpe:/o:debian:debian_linux:7.0, p-cpe:/a:debian:debian_linux:libgtk-vnc-2.0-0, p-cpe:/a:debian:debian_linux:libgtk-vnc-1.0-0, p-cpe:/a:debian:debian_linux:gir1.2-gtk-vnc-2.0, p-cpe:/a:debian:debian_linux:python-gtk-vnc, p-cpe:/a:debian:debian_linux:mozilla-gtk-vnc, p-cpe:/a:debian:debian_linux:gvncviewer, p-cpe:/a:debian:debian_linux:libgtk-vnc-1.0-0-dbg, p-cpe:/a:debian:debian_linux:libgtk-vnc-2.0-dev, p-cpe:/a:debian:debian_linux:libgtk-vnc-1.0-dev, p-cpe:/a:debian:debian_linux:libgvnc-1.0-0

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

Exploit Ease: No known exploits are available

Patch Publication Date: 2/20/2017

Reference Information

CVE: CVE-2017-5884, CVE-2017-5885