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

High Nessus Plugin ID 109691

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VPR Score: 6.7

Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

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)

Solution

Run 'yum update libvncserver' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2018-1012.html

Plugin Details

Severity: High

ID: 109691

File Name: al2_ALAS-2018-1012.nasl

Version: 1.1

Type: local

Agent: unix

Published: 2018/05/11

Updated: 2018/05/11

Dependencies: 12634

Risk Information

Risk Factor: High

VPR Score: 6.7

CVSS v2.0

Base Score: 7.5

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

CVSS v3.0

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: 2018/05/10

Reference Information

CVE: CVE-2018-7225

ALAS: 2018-1012