What’s Vulnerable › Vulnerabilities

CVE-2012-0381

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2012-03-29 · updated 2026-06-16
• Weakness: CWE-310

Description

The IKEv1 implementation in Cisco IOS 12.2 through 12.4 and 15.0 through 15.2 and IOS XE 2.1.x through 2.6.x and 3.1.xS through 3.4.xS before 3.4.2S, 3.5.xS before 3.5.1S, and 3.2.xSG before 3.2.2SG allows remote attackers to cause a denial of service (device reload) by sending IKE UDP packets over (1) IPv4 or (2) IPv6, aka Bug ID CSCts38429.

Affected products

• Cisco IOS: 12.0, 12.2, 12.2(1), 12.2(1)dx, 12.2(1)s, 12.2(1)t (+749)
• Cisco IOS XE: from 2.1.0 through 2.6.2; from 3.1.0s before 3.4.1s; from 3.1.0sg before 3.2.2sg — fixed in 3.2.2sg, 3.4.1s

How to fix

Upgrade to a fixed version: Cisco IOS XE 3.2.2sg, 3.4.1s. Check the vendor advisory for mitigations.

References

• http://osvdb.org/80700
• http://secunia.com/advisories/48605
• http://secunia.com/advisories/48607
• http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120328-ike
• http://www.securityfocus.com/bid/52757
• http://www.securitytracker.com/id?1026863
• https://exchange.xforce.ibmcloud.com/vulnerabilities/74427
• http://osvdb.org/80700
• http://secunia.com/advisories/48605
• http://secunia.com/advisories/48607
• http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20120328-ike
• http://www.securityfocus.com/bid/52757

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