[security-alerts] FW: [SA23978] Cisco IOS SIP Packet Handling Reload Denial of Service

["Kazennov, Vladimir" <Vladimir.Kazennov@xxxxxxxxxx>]

> 
> ----------------------------------------------------------------------
> 
> TITLE:
> Cisco IOS SIP Packet Handling Reload Denial of Service
> 
> SECUNIA ADVISORY ID:
> SA23978
> 
> VERIFY ADVISORY:
> http://secunia.com/advisories/23978/
> 
> CRITICAL:
> Moderately critical
> 
> IMPACT:
> DoS
> 
> WHERE:
> From remote
> 
> OPERATING SYSTEM:
> Cisco IOS R12.x
> http://secunia.com/product/50/
> Cisco IOS 12.x
> http://secunia.com/product/182/
> 
> DESCRIPTION:
> A vulnerability has been reported in Cisco IOS, which can be
> exploited by malicious people to cause a DoS (Denial of Service).
> 
> The vulnerability is caused due to an error when handling certain SIP
> packets and can be exploited to cause the device to reload via a
> specially crafted packet sent to port 5060.
> 
> Successful exploitation requires that the device supports voice and
> is not configured for SIP.
> 
> Please see the vendor's advisory for a list of affected products and
> versions.
> 
> SOLUTION:
> Update to a fixed version (please see the vendor's advisory for
> details).
> 
> PROVIDED AND/OR DISCOVERED BY:
> Reported to the vendor by a customer.
> 
> ORIGINAL ADVISORY:
> Cisco Systems:
> http://www.cisco.com/warp/public/707/cisco-sa-20070131-sip.shtml
> http://www.cisco.com/warp/public/707/cisco-air-20070131-sip.shtml
>