Amazon Linux 2 : libvncserver (ALAS-2018-1012)

critical Nessus Plugin ID 109691
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The remote Amazon Linux 2 host is missing a security update.


Improper input sanitization in rfbProcessClientNormalMessage in rfbserver.c

An issue was discovered in LibVNCServer through 0.9.11.
rfbProcessClientNormalMessage() in rfbserver.c does not sanitize msg.cct.length, leading to access to uninitialized and potentially sensitive data or possibly unspecified other impact (e.g., an integer overflow) via specially crafted VNC packets.(CVE-2018-7225)


Run 'yum update libvncserver' to update your system.

See Also

Plugin Details

Severity: Critical

ID: 109691

File Name: al2_ALAS-2018-1012.nasl

Version: 1.1

Type: local

Agent: unix

Published: 5/11/2018

Updated: 5/11/2018

Dependencies: ssh_get_info.nasl

Risk Information


Risk Factor: Medium

Score: 5.9


Risk Factor: High

Base Score: 7.5

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


Risk Factor: Critical

Base Score: 9.8

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:libvncserver, p-cpe:/a:amazon:linux:libvncserver-debuginfo, p-cpe:/a:amazon:linux:libvncserver-devel, cpe:/o:amazon:linux:2

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

Patch Publication Date: 5/10/2018

Reference Information

CVE: CVE-2018-7225

ALAS: 2018-1012