====================================================================                   Red Hat Security Advisory

Synopsis:          Moderate: vnc security update
Advisory ID:       RHSA-2009:0261-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2009:0261.html
Issue date:        2009-02-11
CVE Names:         CVE-2008-4770 
====================================================================
1. Summary:

Updated vnc packages to correct a security issue are now available for Red
Hat Enterprise Linux 3, 4, and 5.

This update has been rated as having moderate security impact by the Red
Hat Security Response Team.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS version 3 - i386, ia64, ppc, s390, s390x, x86_64
Red Hat Desktop version 3 - i386, x86_64
Red Hat Enterprise Linux ES version 3 - i386, ia64, x86_64
Red Hat Enterprise Linux WS version 3 - i386, ia64, x86_64
Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64
Red Hat Enterprise Linux Desktop version 4 - i386, x86_64
Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64
Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64

3. Description:

Virtual Network Computing (VNC) is a remote display system which allows you
to view a computer's "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.

An insufficient input validation flaw was discovered in the VNC client
application, vncviewer. If an attacker could convince a victim to connect
to a malicious VNC server, or when an attacker was able to connect to
vncviewer running in the "listen" mode, the attacker could cause the
victim's vncviewer to crash or, possibly, execute arbitrary code.
(CVE-2008-4770)

Users of vncviewer should upgrade to these updated packages, which contain
a backported patch to resolve this issue. For the update to take effect,
all running instances of vncviewer must be restarted after the update is
installed.

4. Solution:

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.

This update is available via Red Hat Network.  Details on how to use
the Red Hat Network to apply this update are available at

5. Bugs fixed (http://bugzilla.redhat.com/):

471777 - VNC Free Edition 4.1.3 fixes a  possible security vulnerability only present in the listening viewer. VNC Server is not compromised.
480590 - CVE-2008-4770 vnc: vncviewer insufficient encoding value validation in CMsgReader::readRect

6. Package List:

Red Hat Enterprise Linux AS version 3:

Source:

i386:
vnc-4.0-0.beta4.1.8.i386.rpm
vnc-debuginfo-4.0-0.beta4.1.8.i386.rpm
vnc-server-4.0-0.beta4.1.8.i386.rpm

ia64:
vnc-4.0-0.beta4.1.8.ia64.rpm
vnc-debuginfo-4.0-0.beta4.1.8.ia64.rpm
vnc-server-4.0-0.beta4.1.8.ia64.rpm

ppc:
vnc-4.0-0.beta4.1.8.ppc.rpm
vnc-debuginfo-4.0-0.beta4.1.8.ppc.rpm
vnc-server-4.0-0.beta4.1.8.ppc.rpm

s390:
vnc-4.0-0.beta4.1.8.s390.rpm
vnc-debuginfo-4.0-0.beta4.1.8.s390.rpm
vnc-server-4.0-0.beta4.1.8.s390.rpm

s390x:
vnc-4.0-0.beta4.1.8.s390x.rpm
vnc-debuginfo-4.0-0.beta4.1.8.s390x.rpm
vnc-server-4.0-0.beta4.1.8.s390x.rpm

x86_64:
vnc-4.0-0.beta4.1.8.x86_64.rpm
vnc-debuginfo-4.0-0.beta4.1.8.x86_64.rpm
vnc-server-4.0-0.beta4.1.8.x86_64.rpm

Red Hat Desktop version 3:

Source:

i386:
vnc-4.0-0.beta4.1.8.i386.rpm
vnc-debuginfo-4.0-0.beta4.1.8.i386.rpm
vnc-server-4.0-0.beta4.1.8.i386.rpm

x86_64:
vnc-4.0-0.beta4.1.8.x86_64.rpm
vnc-debuginfo-4.0-0.beta4.1.8.x86_64.rpm
vnc-server-4.0-0.beta4.1.8.x86_64.rpm

Red Hat Enterprise Linux ES version 3:

Source:

i386:
vnc-4.0-0.beta4.1.8.i386.rpm
vnc-debuginfo-4.0-0.beta4.1.8.i386.rpm
vnc-server-4.0-0.beta4.1.8.i386.rpm

ia64:
vnc-4.0-0.beta4.1.8.ia64.rpm
vnc-debuginfo-4.0-0.beta4.1.8.ia64.rpm
vnc-server-4.0-0.beta4.1.8.ia64.rpm

x86_64:
vnc-4.0-0.beta4.1.8.x86_64.rpm
vnc-debuginfo-4.0-0.beta4.1.8.x86_64.rpm
vnc-server-4.0-0.beta4.1.8.x86_64.rpm

Red Hat Enterprise Linux WS version 3:

Source:

i386:
vnc-4.0-0.beta4.1.8.i386.rpm
vnc-debuginfo-4.0-0.beta4.1.8.i386.rpm
vnc-server-4.0-0.beta4.1.8.i386.rpm

ia64:
vnc-4.0-0.beta4.1.8.ia64.rpm
vnc-debuginfo-4.0-0.beta4.1.8.ia64.rpm
vnc-server-4.0-0.beta4.1.8.ia64.rpm

x86_64:
vnc-4.0-0.beta4.1.8.x86_64.rpm
vnc-debuginfo-4.0-0.beta4.1.8.x86_64.rpm
vnc-server-4.0-0.beta4.1.8.x86_64.rpm

Red Hat Enterprise Linux AS version 4:

Source:

i386:
vnc-4.0-12.el4_7.1.i386.rpm
vnc-debuginfo-4.0-12.el4_7.1.i386.rpm
vnc-server-4.0-12.el4_7.1.i386.rpm

ia64:
vnc-4.0-12.el4_7.1.ia64.rpm
vnc-debuginfo-4.0-12.el4_7.1.ia64.rpm
vnc-server-4.0-12.el4_7.1.ia64.rpm

ppc:
vnc-4.0-12.el4_7.1.ppc.rpm
vnc-debuginfo-4.0-12.el4_7.1.ppc.rpm
vnc-server-4.0-12.el4_7.1.ppc.rpm

s390:
vnc-4.0-12.el4_7.1.s390.rpm
vnc-debuginfo-4.0-12.el4_7.1.s390.rpm
vnc-server-4.0-12.el4_7.1.s390.rpm

s390x:
vnc-4.0-12.el4_7.1.s390x.rpm
vnc-debuginfo-4.0-12.el4_7.1.s390x.rpm
vnc-server-4.0-12.el4_7.1.s390x.rpm

x86_64:
vnc-4.0-12.el4_7.1.x86_64.rpm
vnc-debuginfo-4.0-12.el4_7.1.x86_64.rpm
vnc-server-4.0-12.el4_7.1.x86_64.rpm

Red Hat Enterprise Linux Desktop version 4:

Source:

i386:
vnc-4.0-12.el4_7.1.i386.rpm
vnc-debuginfo-4.0-12.el4_7.1.i386.rpm
vnc-server-4.0-12.el4_7.1.i386.rpm

x86_64:
vnc-4.0-12.el4_7.1.x86_64.rpm
vnc-debuginfo-4.0-12.el4_7.1.x86_64.rpm
vnc-server-4.0-12.el4_7.1.x86_64.rpm

Red Hat Enterprise Linux ES version 4:

Source:

i386:
vnc-4.0-12.el4_7.1.i386.rpm
vnc-debuginfo-4.0-12.el4_7.1.i386.rpm
vnc-server-4.0-12.el4_7.1.i386.rpm

ia64:
vnc-4.0-12.el4_7.1.ia64.rpm
vnc-debuginfo-4.0-12.el4_7.1.ia64.rpm
vnc-server-4.0-12.el4_7.1.ia64.rpm

x86_64:
vnc-4.0-12.el4_7.1.x86_64.rpm
vnc-debuginfo-4.0-12.el4_7.1.x86_64.rpm
vnc-server-4.0-12.el4_7.1.x86_64.rpm

Red Hat Enterprise Linux WS version 4:

Source:

i386:
vnc-4.0-12.el4_7.1.i386.rpm
vnc-debuginfo-4.0-12.el4_7.1.i386.rpm
vnc-server-4.0-12.el4_7.1.i386.rpm

ia64:
vnc-4.0-12.el4_7.1.ia64.rpm
vnc-debuginfo-4.0-12.el4_7.1.ia64.rpm
vnc-server-4.0-12.el4_7.1.ia64.rpm

x86_64:
vnc-4.0-12.el4_7.1.x86_64.rpm
vnc-debuginfo-4.0-12.el4_7.1.x86_64.rpm
vnc-server-4.0-12.el4_7.1.x86_64.rpm

Red Hat Enterprise Linux Desktop (v. 5 client):

Source:

i386:
vnc-4.1.2-14.el5_3.1.i386.rpm
vnc-debuginfo-4.1.2-14.el5_3.1.i386.rpm
vnc-server-4.1.2-14.el5_3.1.i386.rpm

x86_64:
vnc-4.1.2-14.el5_3.1.x86_64.rpm
vnc-debuginfo-4.1.2-14.el5_3.1.x86_64.rpm
vnc-server-4.1.2-14.el5_3.1.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:

i386:
vnc-4.1.2-14.el5_3.1.i386.rpm
vnc-debuginfo-4.1.2-14.el5_3.1.i386.rpm
vnc-server-4.1.2-14.el5_3.1.i386.rpm

ia64:
vnc-4.1.2-14.el5_3.1.ia64.rpm
vnc-debuginfo-4.1.2-14.el5_3.1.ia64.rpm
vnc-server-4.1.2-14.el5_3.1.ia64.rpm

ppc:
vnc-4.1.2-14.el5_3.1.ppc.rpm
vnc-debuginfo-4.1.2-14.el5_3.1.ppc.rpm
vnc-server-4.1.2-14.el5_3.1.ppc.rpm

s390x:
vnc-4.1.2-14.el5_3.1.s390x.rpm
vnc-debuginfo-4.1.2-14.el5_3.1.s390x.rpm
vnc-server-4.1.2-14.el5_3.1.s390x.rpm

x86_64:
vnc-4.1.2-14.el5_3.1.x86_64.rpm
vnc-debuginfo-4.1.2-14.el5_3.1.x86_64.rpm
vnc-server-4.1.2-14.el5_3.1.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://www.redhat.com/security/team/key/#package

7. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4770
http://www.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is .  More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2009 Red Hat, Inc.