CVE-2011-3279

Name: CVE-2011-3279
Creator: NVD / NIST
Published: 2011-10-03T23:55:03.907+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.56%

Last modified Jun 16, 2026

CVE-2011-3279 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 2.56% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

2.56%

83.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Cisco	Ios Xe	3.1.0sg
Cisco	Ios Xe	3.1.1sg
Cisco	Ios	>= 12.1, <= 12.4
Cisco	Ios	>= 15.0, <= 15.1

References

http://tools.cisco.com/security/center/viewAlert.x?alertId=24121Vendor Advisory
http://www.cisco.com/en/US/products/products_security_advisory09186a0080b95d4d.shtmlVendor Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13781Third Party Advisory
http://tools.cisco.com/security/center/viewAlert.x?alertId=24121Vendor Advisory
http://www.cisco.com/en/US/products/products_security_advisory09186a0080b95d4d.shtmlVendor Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13781Third Party Advisory

Timeline

Published: Oct 3, 2011
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2011-3279?

How severe is CVE-2011-3279?

Severity scoring for CVE-2011-3279 is pending analysis. The EPSS model estimates a 2.56% probability of exploitation in the next 30 days.

How do I fix CVE-2011-3279?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2011-3279?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST