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TITLE:
Grandstream BudgeTone Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA16438

VERIFY ADVISORY:
http://secunia.com/advisories/16438/

CRITICAL:
Less critical

IMPACT:
DoS

WHERE:
>From local network

OPERATING SYSTEM:
Grandstream BudgeTone 100 Series SIP Phones
http://secunia.com/product/5537/

DESCRIPTION:
Pierre Kroma has reported a vulnerability in Grandstream BudgeTone
100 Series SIP Phones, which can be exploited by malicious people to
cause a DoS (Denial of Service).

The vulnerability is caused due to an error when processing large UDP
datagrams and can be exploited by sending a large UDP datagram (more
than 65534 bytes) to port 5060/udp.

Successful exploitation causes the phone to stop working by aborting
active calls, blank the display, and make the integrated HTTP server
become inaccessible.

The vulnerability has been reported in firmware release 1.0.6.7.
Other versions may also be affected.

SOLUTION:
Use the phones on trusted networks only.

PROVIDED AND/OR DISCOVERED BY:
Pierre Kroma, SySS.

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About:
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