CVE-2011-3279

Severity: high (CVSS 7.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2011-10-03 · updated 2026-06-16

Description

The provider-edge MPLS 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) via a malformed SIP packet to UDP port 5060, aka Bug ID CSCti98219.

Affected products

Cisco IOS: from 12.1 through 12.4; from 15.0 through 15.1
Cisco IOS XE: 3.1.0sg, 3.1.1sg

References

http://tools.cisco.com/security/center/viewAlert.x?alertId=24121
http://www.cisco.com/en/US/products/products_security_advisory09186a0080b95d4d.shtml
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13781
http://tools.cisco.com/security/center/viewAlert.x?alertId=24121
http://www.cisco.com/en/US/products/products_security_advisory09186a0080b95d4d.shtml
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13781

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