Debian DSA-4383-1 : libvncserver - security update

critical Nessus Plugin ID 121561
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

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

Description

Pavel Cheremushkin discovered several vulnerabilities in libvncserver, a library to implement VNC server/client functionalities, which might result in the execution of arbitrary code, denial of service or information disclosure.

Solution

Upgrade the libvncserver packages.

For the stable distribution (stretch), these problems have been fixed in version 0.9.11+dfsg-1.3~deb9u1.

See Also

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=916941

http://www.nessus.org/u?b930abb4

https://packages.debian.org/source/stretch/libvncserver

https://www.debian.org/security/2019/dsa-4383

Plugin Details

Severity: Critical

ID: 121561

File Name: debian_DSA-4383.nasl

Version: 1.2

Type: local

Agent: unix

Published: 2/4/2019

Updated: 2/20/2020

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2018-20020

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

Temporal Vector: E:U/RL:OF/RC:C

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: E:U/RL:O/RC:C

Vulnerability Information

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

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

Exploit Ease: No known exploits are available

Patch Publication Date: 2/3/2019

Vulnerability Publication Date: 12/19/2018

Reference Information

CVE: CVE-2018-15126, CVE-2018-15127, CVE-2018-20019, CVE-2018-20020, CVE-2018-20021, CVE-2018-20022, CVE-2018-20023, CVE-2018-20024, CVE-2018-6307

DSA: 4383