Mandriva Linux Security Advisory : libvncserver (MDVSA-2015:146)

High Nessus Plugin ID 82399

New! Vulnerability Priority Rating (VPR)

Tenable calculates a dynamic VPR for every vulnerability. VPR combines vulnerability information with threat intelligence and machine learning algorithms to predict which vulnerabilities are most likely to be exploited in attacks. Read more about what VPR is and how it's different from CVSS.

VPR Score: 5.9

Synopsis

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

Description

Updated libvncserver packages fix security vulnerabilities :

An integer overflow in liblzo before 2.07 allows attackers to cause a denial of service or possibly code execution in applications using performing LZO decompression on a compressed payload from the attacker (CVE-2014-4607).

The libvncserver library is built with a bundled copy of minilzo, which is a part of liblzo containing the vulnerable code.

A malicious VNC server can trigger incorrect memory management handling by advertising a large screen size parameter to the VNC client. This would result in multiple memory corruptions and could allow remote code execution on the VNC client (CVE-2014-6051, CVE-2014-6052).

A malicious VNC client can trigger multiple DoS conditions on the VNC server by advertising a large screen size, ClientCutText message length and/or a zero scaling factor parameter (CVE-2014-6053, CVE-2014-6054).

A malicious VNC client can trigger multiple stack-based buffer overflows by passing a long file and directory names and/or attributes (FileTime) when using the file transfer message feature (CVE-2014-6055).

Solution

Update the affected lib64vncserver-devel, lib64vncserver0 and / or linuxvnc packages.

See Also

http://advisories.mageia.org/MGASA-2014-0356.html

http://advisories.mageia.org/MGASA-2014-0397.html

Plugin Details

Severity: High

ID: 82399

File Name: mandriva_MDVSA-2015-146.nasl

Version: 1.3

Type: local

Published: 2015/03/30

Updated: 2019/08/02

Dependencies: 12634

Risk Information

Risk Factor: High

VPR Score: 5.9

CVSS v2.0

Base Score: 7.5

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

Vulnerability Information

CPE: p-cpe:/a:mandriva:linux:lib64vncserver-devel, p-cpe:/a:mandriva:linux:lib64vncserver0, p-cpe:/a:mandriva:linux:linuxvnc, cpe:/o:mandriva:business_server:2

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

Patch Publication Date: 2015/03/29

Reference Information

CVE: CVE-2014-4607, CVE-2014-6051, CVE-2014-6052, CVE-2014-6053, CVE-2014-6054, CVE-2014-6055

MDVSA: 2015:146