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