Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

CVE-2011-3279

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.

Security Impact Summary

CVE-2011-3279 is a security vulnerability that . Impacting 2 products from cisco, from cisco organizations running these solutions should prioritize assessment and patching.

Historical Context

Documented in 2011, this vulnerability occurred amid the cloud computing expansion era, where traditional network perimeter security models were being reevaluated. Organizations were transitioning from isolated infrastructure to interconnected systems, creating new attack surfaces that vulnerabilities like this could exploit.

Published

2011-10-03T23:55:03.907

Last Modified

2025-04-11T00:51:21.963

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 7.8 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: COMPLETE

Exploitability Score

10.0

Impact Score

6.9

Weaknesses

Type: Primary
NVD-CWE-noinfo

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	cisco	ios_xe	3.1.0sg	Yes
Operating System	cisco	ios_xe	3.1.1sg	Yes
Operating System	cisco	ios	≤ 12.4	Yes
Operating System	cisco	ios	≤ 15.1	Yes

References

http://tools.cisco.com/security/center/viewAlert.x?alertId=24121 Vendor Advisory ([email protected])
http://www.cisco.com/en/US/products/products_security_advisory09186a0080b95d4d.shtml Vendor Advisory ([email protected])
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13781 Third Party Advisory ([email protected])
http://tools.cisco.com/security/center/viewAlert.x?alertId=24121 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.cisco.com/en/US/products/products_security_advisory09186a0080b95d4d.shtml Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13781 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For cisco's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.