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Test ID:1.3.6.1.4.1.25623.1.0.870660
Category:Red Hat Local Security Checks
Title:RedHat Update for tigervnc RHSA-2011:0871-01
Summary:The remote host is missing an update for the 'tigervnc'; package(s) announced via the referenced advisory.
Description:Summary:
The remote host is missing an update for the 'tigervnc'
package(s) announced via the referenced advisory.

Vulnerability Insight:
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.

Affected Software/OS:
tigervnc on Red Hat Enterprise Linux Desktop (v. 6),
Red Hat Enterprise Linux Server (v. 6),
Red Hat Enterprise Linux Workstation (v. 6)

Solution:
Please Install the Updated Packages.

CVSS Score:
5.8

CVSS Vector:
AV:N/AC:M/Au:N/C:P/I:P/A:N

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2011-1775
BugTraq ID: 47738
http://www.securityfocus.com/bid/47738
http://lists.fedoraproject.org/pipermail/package-announce/2011-May/060567.html
http://openwall.com/lists/oss-security/2011/05/06/2
http://openwall.com/lists/oss-security/2011/05/09/7
http://www.mail-archive.com/tigervnc-devel@lists.sourceforge.net/msg01345.html
http://www.mail-archive.com/tigervnc-devel@lists.sourceforge.net/msg01342.html
http://www.mail-archive.com/tigervnc-devel@lists.sourceforge.net/msg01347.html
http://www.redhat.com/support/errata/RHSA-2011-0871.html
http://secunia.com/advisories/44939
CopyrightCopyright (c) 2012 Greenbone Networks GmbH

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