Debian DSA-4799-1 : x11vnc - security update

high Nessus Plugin ID 143315

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Synopsis

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

Description

Guenal Davalan reported a flaw in x11vnc, a VNC server to allow remote access to an existing X session. x11vnc creates shared memory segments with 0777 mode. A local attacker can take advantage of this flaw for information disclosure, denial of service or interfering with the VNC session of another user on the host.

Solution

Upgrade the x11vnc packages.

For the stable distribution (buster), this problem has been fixed in version 0.9.13-6+deb10u1.

Plugin Details

Severity: High

ID: 143315

File Name: debian_DSA-4799.nasl

Version: 1.5

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 11/30/2020

Updated: 2/7/2024

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

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 4.8

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

CVSS Score Source: CVE-2020-29074

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/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:x11vnc, cpe:/o:debian:debian_linux:10.0

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

Exploit Ease: No known exploits are available

Patch Publication Date: 11/28/2020

Vulnerability Publication Date: 11/25/2020

Reference Information

CVE: CVE-2020-29074

DSA: 4799

Detections

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