TITLE:
Cisco IP Phones SYN Flood Device Reload Vulnerability

SECUNIA ADVISORY ID:
SA18479

VERIFY ADVISORY:
http://secunia.com/advisories/18479/

CRITICAL:
Less critical

IMPACT:
DoS

WHERE:
>From local network

OPERATING SYSTEM:
Cisco IP Phone 7900 Series
http://secunia.com/product/2809/

SOFTWARE:
Cisco IP Phones 7960
http://secunia.com/product/287/
Cisco IP Phone 7940
http://secunia.com/product/1113/

DESCRIPTION:
A vulnerability has been reported in Cisco 7940 and 7960 IP Phones,
which can be exploited by malicious people to cause a DoS (Denial of
Service).

The vulnerability is caused due to an error in the IP Stack. This can
be exploited to cause the IP Phone to reload by sending a SYN flood to
an arbitrary port.

SOLUTION:
Update to firmware revision 7.1(1) or later, which have the
capability to perform load control using TCP throttling. This
prevents a device from reloading.

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Knud Erik Højgaard.

ORIGINAL ADVISORY:
http://www.cisco.com/warp/public/707/cisco-response-20060113-ip-phones.shtml

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