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Test ID:1.3.6.1.4.1.25623.1.0.801898
Category:General
Title:TigerVNC SSL Certificate Validation Security Bypass Vulnerability (Windows)
Summary:This host is installed with TigerVNC and is prone to security;bypass vulnerability.
Description:Summary:
This host is installed with TigerVNC and is prone to security
bypass vulnerability.

Vulnerability Insight:
The flaw is caused by improper verification of server's X.509
certificate, which allows man-in-the-middle attackers to spoof a TLS VNC server
via an arbitrary certificate.

Vulnerability Impact:
Successful exploitation allows attackers to perform
man-in-the-middle attacks or impersonate trusted servers, which will aid in
further attacks.

Affected Software/OS:
TigerVNC version 1.1beta1

Solution:
No known solution was made available for at least one year since the disclosure
of this vulnerability. Likely none will be provided anymore. General solution options are to upgrade to a newer
release, disable respective features, remove the product or replace the product by another one.

CVSS Score:
5.8

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

Cross-Ref: BugTraq ID: 47738
Common Vulnerability Exposure (CVE) ID: CVE-2011-1775
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) 2011 Greenbone Networks GmbH

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