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TITLE:
VMware Authorization Service Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA36988

VERIFY ADVISORY:
http://secunia.com/advisories/36988/

DESCRIPTION:
shinnai has discovered a vulnerability in multiple VMware products,
which can be exploited by malicious people to cause a DoS (Denial of
Service).

The vulnerability is caused due to an error in the VMware
Authorization Service when processing login requests. This can be
exploited to terminate the "vmware-authd" process via "USER" or
"PASS" strings containing e.g. '\xFF' characters, sent to TCP port
912.

The vulnerability is confirmed in vmware-authd.exe version 6.5.3.8888
included in VMware Workstation 6.5.3 build 185404, and reported in
VMware Player 2.5.3 build 185404 and VMware ACE 2.5.3. Other versions
may also be affected.

SOLUTION:
Restrict access to TCP port 912 to trusted users only.

PROVIDED AND/OR DISCOVERED BY:
shinnai

CHANGELOG:
2009-10-09: Added "VMware ACE 2.x" to the list of affected products.

ORIGINAL ADVISORY:
http://www.shinnai.net/index.php?mod=02_Forum&group=02_Bugs_and_Exploits&argument=01_Remote&topic=1254924405.ff.php

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