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From:SECUNIA <support_(at)_secunia.com>
Date:14.07.2006
Subject:[SA20940] LibVNCServer Authentication Bypass Vulnerability


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TITLE:
LibVNCServer Authentication Bypass Vulnerability

SECUNIA ADVISORY ID:
SA20940

VERIFY ADVISORY:
http://secunia.com/advisories/20940/

CRITICAL:
Highly critical

IMPACT:
Security Bypass

WHERE:
>From remote

SOFTWARE:
LibVNCServer 0.x
http://secunia.com/product/10909/

DESCRIPTION:
A vulnerability has been reported in LibVNCServer, which can be
exploited by malicious people to bypass certain security
restrictions.

The vulnerability is caused due to an error within the handling of
VNC authentication requests. This can be exploited to bypass
authentication and may allow access to the functionality of an
application using the vulnerable library.

SOLUTION:
The vulnerability has been fixed in the CVS repository.

PROVIDED AND/OR DISCOVERED BY:
Ludwig Nussel

ORIGINAL ADVISORY:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=376824

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About:
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everybody keeping their systems up to date against the latest
vulnerabilities.

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