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

high Nessus Plugin ID 82399

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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: 1.4

Type: local

Published: 3/30/2015

Updated: 1/14/2021

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

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

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

Patch Publication Date: 3/29/2015

Reference Information

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

MDVSA: 2015:146