RHBA-2011:0649 - Bug Fix Advisory

Topic

Updated tigervnc packages that fix several bugs and add an enhancement are now
available.

Description

Virtual Network Computing (VNC) is a remote display system which allows you 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.

These updated tigervnc packages provide fixes for the following bugs:

• Xvnc could become unresponsive and the following error message was shown in

the log: "[mi] EQ overflowing. The server is probably stuck in an infinite
loop.". This was caused by a large number of user input events in the Xvnc event
queue, which were being processed too slowly. With this update, this issue no
longer occurs and the system works as expected. (BZ#588342)

• Prior to this update, Xvnc (the X VNC server; part of the tigervnc package)

did not pass keyboard input to a remote VMware workstation because it did not
take into account types of keyboards which do not have modifier keys. With this
update, Xvnc recognizes all types of keyboards; thus, keyboard input is
correctly passed to remote VMware workstations. (BZ#628054)

• When connecting to a remote machine, the default ".vnc/xstartup" file did not

load the i18n (the default X locale settings) settings from the
"/etc/sysconfig/i18n" file which caused the remotely accessed desktop to always
use the "en_US" locale. With this update, the default ".vnc/xstartup" file loads
the i18n settings and shows the correct locale. (BZ#632530)

• The tigervnc-server package was missing a perl dependency, causing the

"/usr/bin/vncserver" script to fail to run. This update adds the perl dependency
to the tigervnc-server package; thus, the "/usr/bin/vncserver" script runs as
expected. (BZ#634161)

• The Xvnc server randomly refused connections when the reading of the password

file (provided when starting Xvnc with the "-PasswordFile" option) was
interrupted by a signal. With this update, the loading of a password file
continues after an interrupt signal is issued and connections are no longer
refused. (BZ#645755)

In addition, these updated tigervnc packages provide the following enhancement:

• TigerVNC (Xvnc, x0vncserver, the libvnc.so module, and vncviewer) now supports

TLS encryption (using VeNCrypt) which allows TLS encrypted communication between
a server and a viewer. (BZ#653491)

Users are advised to upgrade to these updated tigervnc packages, which resolve
these issues and add this enhancement.

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
https://access.redhat.com/kb/docs/DOC-11259

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Server 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Workstation 6 i386
• Red Hat Enterprise Linux Desktop 6 x86_64
• Red Hat Enterprise Linux Desktop 6 i386
• Red Hat Enterprise Linux for IBM z Systems 6 s390x
• Red Hat Enterprise Linux for Power, big endian 6 ppc64
• Red Hat Enterprise Linux for Scientific Computing 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 6 s390x
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension (for IBM z Systems) 6 s390x

Fixes

• BZ - 628054 - Tiger-vnc server doesn't pass keyboard input to VMware Workstation/Player
• BZ - 632530 - RFE: Add zh (Chinese Simplified) translation to vncviewer
• BZ - 634161 - tigervnc-server is missing dependency on perl
• BZ - 645755 - Xvnc randomly refuses connections because reading the password file is interrupted by SIGALRM
• BZ - 653491 - Update to TigerVNC 1.1.0

CVEs

(none)

References

(none)