Moderate CentOS tigervnc Security Update

Metadata

high
7.5
tigervnc-1.3.1-3.el7.x86_64.rpm, tigervnc-icons-1.3.1-3.el7.noarch.rpm, tigervnc-license-1.3.1-3.el7.noarch.rpm, tigervnc-server-1.3.1-3.el7.x86_64.rpm, tigervnc-server-applet-1.3.1-3.el7.noarch.rpm, tigervnc-server-minimal-1.3.1-3.el7.x86_64.rpm, tigervnc-server-module-1.3.1-3.el7.x86_64.rpm
CVE-2014-8240, CVE-2014-8241
rhn.redhat.com, lists.centos.org
2015-11-30
2017-07-27 19:10
ALAS-2015-623
CVE-2014-8240 tigervnc
CVE-2014-8241 tigervnc
2017-04-01 19:09
2017-01-05 20:13

Description


Updated tigervnc packages that fix two security issues, several bugs, and
add various enhancements are now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having Moderate security
impact. Common Vulnerability Scoring System (CVSS) base scores, which give
detailed severity ratings, are available for each vulnerability from the
CVE links in the References section.

Virtual Network Computing (VNC) is a remote display system which allows
users to view a computing desktop environment not only on the machine where
it is running, but from anywhere on the Internet and from a wide variety of
machine architectures. TigerVNC is a suite of VNC servers and clients.
The tigervnc packages contain a client which allows users to connect to
other desktops running a VNC server.

An integer overflow flaw, leading to a heap-based buffer overflow, was
found in the way TigerVNC handled screen sizes. A malicious VNC server
could use this flaw to cause a client to crash or, potentially, execute
arbitrary code on the client. (CVE-2014-8240)

A NULL pointer dereference flaw was found in TigerVNC's XRegion.
A malicious VNC server could use this flaw to cause a client to crash.
(CVE-2014-8241)

The tigervnc packages have been upgraded to upstream version 1.3.1, which
provides a number of bug fixes and enhancements over the previous version.
(BZ#1199453)

This update also fixes the following bug:

* The position of the mouse cursor in the VNC session was not correctly
communicated to the VNC viewer, resulting in cursor misplacement.
The method of displaying the remote cursor has been changed, and cursor
movements on the VNC server are now accurately reflected on the VNC client.
(BZ#1100661)

All tigervnc users are advised to upgrade to these updated packages, which
correct these issues and add these enhancements.
Please see https://www.redhat.com/footer/terms-of-use.html

Am I vulnerable?

The constraints below list the versions that this vulnerability is patched in, and versions that are unaffected. If a patch is ready but unrealeased, then it is pending.

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Affected package information

Release Package Patched in
7 tigervnc tigervnc-1.3.1-3.el7.x86_64.rpm
tigervnc-icons tigervnc-icons-1.3.1-3.el7.noarch.rpm
tigervnc-license tigervnc-license-1.3.1-3.el7.noarch.rpm
tigervnc-server tigervnc-server-1.3.1-3.el7.x86_64.rpm
tigervnc-server-applet tigervnc-server-applet-1.3.1-3.el7.noarch.rpm
tigervnc-server-minimal tigervnc-server-minimal-1.3.1-3.el7.x86_64.rpm
tigervnc-server-module tigervnc-server-module-1.3.1-3.el7.x86_64.rpm