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TITLE:
VMware "vmware-authd" Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA33372

VERIFY ADVISORY:
http://secunia.com/advisories/33372/

CRITICAL:
Less critical

IMPACT:
DoS

WHERE:
>From local network

SOFTWARE:
VMware Workstation 6.x
http://secunia.com/advisories/product/14321/
VMWare Player 2.x
http://secunia.com/advisories/product/15771/

DESCRIPTION:
Laurent Gaffié has discovered a vulnerability in VMware, 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-authd"
daemon when processing overly long strings. This can be exploited to
terminate the "vmware-authd" process via e.g. an overly long "USER"
string sent to TCP port 912.

Successful exploitation allows e.g. denying virtual machine access to
local unprivileged users.

The vulnerability is confirmed in VMware Player 2.5.1 build 126130
and VMware Workstation 6.5.1 build 126130 on Windows. Other versions
may also be affected.

SOLUTION:
Restrict access to the service to trusted users only.

PROVIDED AND/OR DISCOVERED BY:
Laurent Gaffié

ORIGINAL ADVISORY:
http://milw0rm.com/exploits/7647

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