Debian DSA-3753-1 : libvncserver - security update

critical Nessus Plugin ID 96318

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Synopsis

The remote Debian host is missing a security-related update.

Description

It was discovered that libvncserver, a collection of libraries used to implement VNC/RFB clients and servers, incorrectly processed incoming network packets. This resulted in several heap-based buffer overflows, allowing a rogue server to either cause a DoS by crashing the client, or potentially execute arbitrary code on the client side.

Solution

Upgrade the libvncserver packages.

For the stable distribution (jessie), these problems have been fixed in version 0.9.9+dfsg2-6.1+deb8u2.

Plugin Details

Severity: Critical

ID: 96318

File Name: debian_DSA-3753.nasl

Version: 3.6

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 1/6/2017

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:8.0, p-cpe:/a:debian:debian_linux:libvncserver

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

Exploit Ease: No known exploits are available

Patch Publication Date: 1/5/2017

Reference Information

CVE: CVE-2016-9941, CVE-2016-9942

DSA: 3753

Detections

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