Vulnerability Assessment & Network Security Forums



If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important.  If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery.


Home >> Browse Vulnerability Assessment Database >> Misc. >> RealVNC Authentication Bypass Vulnerability


Vulnerability Assessment Details

RealVNC Authentication Bypass Vulnerability

Vulnerability Assessment Summary
Tries to bypass authentication using RealVNC

Detailed Explanation for this Vulnerability Assessment

Summary :

The remote VNC server is prone to an authentication bypass issue.

Description :

The remote host appears to be running RealVNC, a VNC server for
Windows and Linux/unix platforms.

The version of RealVNC installed on the remote host permits a possible hacker
to bypass authentication by simply requesting 'Type 1 - None' as the
authentication type even though it is not explicitly configured to
support that. By exploiting this issue, a possible hacker gains access to
the affected host at the privilege level under which RealVNC operates,
typically as Administrator under Windows.

See also :

http://www.intelliadmin.com/blog/2006/05/security-flaw-in-realvnc-411.html
http://lists.grok.org.uk/pipermail/full-disclosure/2006-May/046039.html
http://www.realvnc.com/products/free/4.1/release-notes.html
http://www.realvnc.com/products/personal/4.2/release-notes.html
http://www.realvnc.com/products/enterprise/4.2/release-notes.html

Solution :

Upgrade to RealVNC Free Edition 4.1.2 / Personal Edition 4.2.3 /
Enterprise Edition 4.2.3 or later.

Network Security Threat Level:

High / CVSS Base Score : 7.0
(AV:R/AC:L/Au:NR/C:P/I:P/A:P/B:N)

Networks Security ID: 17978

Vulnerability Assessment Copyright: This script is Copyright (C) 2006 Tenable Network Security

Cables, Connectors

HP ProLiant MicroServer Gen7 8GB N40L USA cube PC eSATA 2x PCIe 4 SATA G7
$160.0
HP ProLiant MicroServer Gen7 8GB N40L USA cube PC eSATA 2x PCIe 4 SATA G7 pictureHP 2GB DDR3 1600Mhz 669320-B21 Unbuffered ECC RAM from HP Microserver Gen8
$34.99
HP 2GB DDR3 1600Mhz 669320-B21 Unbuffered ECC RAM from HP Microserver Gen8 pictureHP ProLiant MicroServer 8GB RAM 2x2TB HDD Windows Server 2008
$249.99
HP ProLiant MicroServer 8GB RAM 2x2TB HDD Windows Server 2008 pictureHP ProLiant G7 N54L MicroServer Server(704941-001) 2GB RAM 250GB HDD
$400.0
HP ProLiant G7 N54L MicroServer Server(704941-001) 2GB RAM 250GB HDD picture


Discussions

No Discussions have been posted on this vulnerability.