Debian DLA-2854-1 : novnc - LTS security update

medium Nessus Plugin ID 156332

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Synopsis

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

Description

The remote Debian 9 host has packages installed that are affected by a vulnerability as referenced in the dla-2854 advisory.

An XSS vulnerability was discovered in noVNC, a HTML5 VNC client, in which the remote VNC server could inject arbitrary HTML into the noVNC web page via the messages propagated to the status field, such as the VNC server name. For Debian 9 stretch, this problem has been fixed in version 1:0.4+dfsg+1+20131010+gitf68af8af3d-6+deb9u1. We recommend that you upgrade your novnc packages. For the detailed security status of novnc please refer to its security tracker page at: https://security- tracker.debian.org/tracker/novnc Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade the novnc packages.

For Debian 9 stretch, this problem has been fixed in version 1

Plugin Details

Severity: Medium

ID: 156332

File Name: debian_DLA-2854.nasl

Version: 1.4

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 12/28/2021

Updated: 1/24/2025

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

Risk Information

VPR

Risk Factor: Low

Score: 3.8

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.4

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

CVSS Score Source: CVE-2017-18635

CVSS v3

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 5.5

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:python-novnc, cpe:/o:debian:debian_linux:9.0, p-cpe:/a:debian:debian_linux:novnc

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 12/28/2021

Vulnerability Publication Date: 9/25/2019

Reference Information

CVE: CVE-2017-18635

Detections

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