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TITLE:
Ventrilo Client Voice Packet Denial of Service Vulnerabilities

SECUNIA ADVISORY ID:
SA36639

VERIFY ADVISORY:
http://secunia.com/advisories/36639/

DESCRIPTION:
Luigi Auriemma has reported two vulnerabilities in Ventrilo Client,
which can be exploited by malicious people to cause a DoS (Denial of
Service).

1) An error in the processing of voice packets can be exploited to
cause a client to crash by sending a specially crafted voice packet
addressed to the client.

2) An error in the processing of malformed voice packets when the
speex codec is used can be exploited to cause a client to crash by
sending a specially crafted packet addressed to the client.

Successful exploitation requires user access to the Ventrilo server.

The vulnerabilities are reported in version 3.0.5. Other versions may
also be affected.

SOLUTION:
Grant only trusted users access to the used Ventrilo Server.

PROVIDED AND/OR DISCOVERED BY:
Luigi Auriemma

ORIGINAL ADVISORY:
http://aluigi.altervista.org/adv/ventrilomemset-adv.txt
http://aluigi.altervista.org/adv/ventspeex-adv.txt

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