CVE-2011-3380

What it is

Openswan 2.6.29 through 2.6.35 allows remote attackers to cause a denial of service (NULL pointer dereference and pluto IKE daemon crash) via an ISAKMP message with an invalid KEY_LENGTH attribute, which is not properly handled by the error handling function.

At a glance

Exploitability

Can be exploited over the network without logging in. Limited direct impact.

Exploit odds

2.3% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2011-11-17 19:55 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-16 23:33 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 2.3% in the next 30 days (EPSS).
• Severity: 5.0 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2011-11-17 19:55 UTC

Last modified

2026-06-16 23:33 UTC

Exploit probability

2.3% · EPSS, next 30 days

Record status

Modified

Affected

• Xelerance Openswan 2.6.29
• Xelerance Openswan 2.6.30
• Xelerance Openswan 2.6.31
• Xelerance Openswan 2.6.32
• Xelerance Openswan 2.6.33
• Xelerance Openswan 2.6.34
• Xelerance Openswan 2.6.35

Attack profile CVSS 2.0 · 5.0

Attack vector

Network

Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

Is it in your code?

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