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Scientific Linux Security Update : libvncserver on SL6.x, SL7.x i386/x86_64 (20141111)

high Nessus Plugin ID 79230

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Synopsis

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

Description

An integer overflow flaw, leading to a heap-based buffer overflow, was found in the way screen sizes were handled by LibVNCServer. A malicious VNC server could use this flaw to cause a client to crash or, potentially, execute arbitrary code in the client. (CVE-2014-6051)

A NULL pointer dereference flaw was found in LibVNCServer's framebuffer setup. A malicious VNC server could use this flaw to cause a VNC client to crash. (CVE-2014-6052)

A NULL pointer dereference flaw was found in the way LibVNCServer handled certain ClientCutText message. A remote attacker could use this flaw to crash the VNC server by sending a specially crafted ClientCutText message from a VNC client. (CVE-2014-6053)

A divide-by-zero flaw was found in the way LibVNCServer handled the scaling factor when it was set to '0'. A remote attacker could use this flaw to crash the VNC server using a malicious VNC client.
(CVE-2014-6054)

Two stack-based buffer overflow flaws were found in the way LibVNCServer handled file transfers. A remote attacker could use this flaw to crash the VNC server using a malicious VNC client.
(CVE-2014-6055)

All running applications linked against libvncserver must be restarted for this update to take effect.

Solution

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

See Also

http://www.nessus.org/u?c4aeac59

Plugin Details

Severity: High

ID: 79230

File Name: sl_20141111_libvncserver_on_SL6_x.nasl

Version: 1.5

Type: local

Agent: unix

Published: 11/13/2014

Updated: 1/14/2021

Supported Sensors: Nessus Agent, 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:fermilab:scientific_linux:libvncserver-debuginfo, p-cpe:/a:fermilab:scientific_linux:libvncserver, x-cpe:/o:fermilab:scientific_linux, p-cpe:/a:fermilab:scientific_linux:libvncserver-devel

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

Patch Publication Date: 11/11/2014

Vulnerability Publication Date: 9/30/2014

Reference Information

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