Unspecified vulnerability in the NAT implementation in Cisco IOS 12.1 through 12.4 and 15.0 through 15.1, and IOS XE 3.1.xSG, allows remote attackers to cause a denial of service (device reload or hang) by sending crafted SIP packets to TCP port 5060, aka Bug ID CSCso02147.
http://tools.cisco.com/security/center/viewAlert.x?alertId=24118
http://www.cisco.com/en/US/products/products_security_advisory09186a0080b95d4d.shtml
Source: MITRE
Published: 2011-10-03
Updated: 2012-05-14
Type: NVD-CWE-noinfo
Base Score: 7.8
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C
Impact Score: 6.9
Exploitability Score: 10
Severity: HIGH