Issued:
2011-06-15
Updated:
2011-06-15

RHSA-2011:0871 - Moderate: tigervnc security update

Synopsis

Moderate: tigervnc security update

Type/Severity

Security Advisory Moderate

Topic

Updated tigervnc packages that fix one security issue are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

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. TigerVNC is a suite of VNC servers and clients.

It was discovered that vncviewer could prompt for and send authentication credentials to a remote server without first properly validating the server's X.509 certificate. As vncviewer did not indicate that the certificate was bad or missing, a man-in-the-middle attacker could use this flaw to trick a vncviewer client into connecting to a spoofed VNC server, allowing the attacker to obtain the client's credentials. (CVE-2011-1775)

All tigervnc users should upgrade to these updated packages, which contain a backported patch to correct this issue.

Solution

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

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at This content is not included.https://access.redhat.com/kb/docs/DOC-11259

Affected Products

ProductVersionArch
Red Hat Virtual Storage Appliance (from RHUI)6.1x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support6.1x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support6.1i386
Red Hat Enterprise Linux for Scientific Computing6x86_64
Red Hat Enterprise Linux for Power, big endian6ppc64
Red Hat Enterprise Linux for Power, big endian - Extended Update Support6.1ppc64
Red Hat Enterprise Linux for IBM z Systems6s390x
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support6.1s390x
Red Hat Enterprise Linux Workstation6x86_64
Red Hat Enterprise Linux Workstation6i386
Red Hat Enterprise Linux Server6x86_64
Red Hat Enterprise Linux Server6i386
Red Hat Enterprise Linux Server from RHUI6x86_64
Red Hat Enterprise Linux Server from RHUI6i386
Red Hat Enterprise Linux Server - Retired Extended Life Cycle Support6x86_64
Red Hat Enterprise Linux Server - Extended Update Support from RHUI6.1x86_64
Red Hat Enterprise Linux Server - Extended Update Support from RHUI6.1i386
Red Hat Enterprise Linux Server - Extended Life Cycle Support6x86_64
Red Hat Enterprise Linux Server - Extended Life Cycle Support6i386
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension6x86_64
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension6i386
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension (for IBM z Systems)6s390x
Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems)6s390x
Red Hat Enterprise Linux Desktop6x86_64
Red Hat Enterprise Linux Desktop6i386

Updated Packages

  • tigervnc-debuginfo-1.0.90-0.15.20110314svn4359.el6_1.1.x86_64.rpm
  • tigervnc-server-1.0.90-0.15.20110314svn4359.el6_1.1.s390x.rpm
  • tigervnc-debuginfo-1.0.90-0.15.20110314svn4359.el6_1.1.s390x.rpm
  • tigervnc-1.0.90-0.15.20110314svn4359.el6_1.1.i686.rpm
  • tigervnc-debuginfo-1.0.90-0.15.20110314svn4359.el6_1.1.ppc64.rpm
  • tigervnc-1.0.90-0.15.20110314svn4359.el6_1.1.ppc64.rpm
  • tigervnc-server-module-1.0.90-0.15.20110314svn4359.el6_1.1.x86_64.rpm
  • tigervnc-server-1.0.90-0.15.20110314svn4359.el6_1.1.ppc64.rpm
  • tigervnc-server-applet-1.0.90-0.15.20110314svn4359.el6_1.1.noarch.rpm
  • tigervnc-1.0.90-0.15.20110314svn4359.el6_1.1.x86_64.rpm
  • tigervnc-server-module-1.0.90-0.15.20110314svn4359.el6_1.1.ppc64.rpm
  • tigervnc-server-module-1.0.90-0.15.20110314svn4359.el6_1.1.i686.rpm
  • tigervnc-1.0.90-0.15.20110314svn4359.el6_1.1.s390x.rpm
  • tigervnc-server-1.0.90-0.15.20110314svn4359.el6_1.1.x86_64.rpm
  • tigervnc-debuginfo-1.0.90-0.15.20110314svn4359.el6_1.1.i686.rpm
  • tigervnc-server-1.0.90-0.15.20110314svn4359.el6_1.1.i686.rpm
  • tigervnc-1.0.90-0.15.20110314svn4359.el6_1.1.src.rpm

Fixes

CVEs

References

Additional information