Detections
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CentOS 7 : libvncserver (RHSA-2020:0913)

critical Nessus Plugin ID 134913

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Synopsis

The remote CentOS Linux host is missing one or more security updates.

Description

The remote CentOS Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:0913 advisory.

 - libvncserver: HandleCursorShape() integer overflow resulting in heap-based buffer overflow (CVE-2019-15690)

 - libvncclient/cursor.c in LibVNCServer through 0.9.12 has a HandleCursorShape integer overflow and heap- based buffer overflow via a large height or width value. NOTE: this may overlap CVE-2019-15690.
 (CVE-2019-20788)

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

Solution

Update the affected libvncserver and / or libvncserver-devel packages.

See Also

https://access.redhat.com/errata/RHSA-2020:0913

Plugin Details

Severity: Critical

ID: 134913

File Name: centos_RHSA-2020-0913.nasl

Version: 1.6

Type: local

Agent: unix

Published: 3/26/2020

Updated: 10/9/2024

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

Risk Information

VPR

Risk Factor: High

Score: 7.4

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.9

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

CVSS Score Source: CVE-2019-20788

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:centos:centos:libvncserver, cpe:/o:centos:centos:7, p-cpe:/a:centos:centos:libvncserver-devel

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/CentOS/release, Host/CentOS/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 3/25/2020

Reference Information

CVE: CVE-2019-15690, CVE-2019-20788

IAVA: 2020-A-0381

RHSA: 2020:0913