CVE-2011-3280

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2011-10-03 · updated 2026-06-16
Weakness: CWE-399

Description

Memory leak 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 (memory consumption or device reload) by sending crafted SIP packets to UDP port 5060, aka Bug ID CSCtj04672.

Affected products

Cisco IOS: 12.1, 12.1e, 12.2, 12.2b, 12.2bc, 12.2bx (+181)
Cisco IOS XE: 3.1.0sg, 3.1.1sg

References

http://tools.cisco.com/security/center/viewAlert.x?alertId=24120
http://www.cisco.com/en/US/products/products_security_advisory09186a0080b95d4d.shtml
http://tools.cisco.com/security/center/viewAlert.x?alertId=24120
http://www.cisco.com/en/US/products/products_security_advisory09186a0080b95d4d.shtml

Get alerted when CVE-2011-3280 or the next vulnerability affects your stack