CVE-2011-3380

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.

Published: 2011-11-17 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-3380 is rated Moderate Risk (42.6/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.53%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2011-3380

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 0.59% 0.53% -0.05%
2 2025-03-29 0.53% 0.59% +0.05%
3 2025-03-17 — 0.53% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-3380

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2011-3380

OS Trackers for CVE-2011-3380

vendor priority summary link
redhat medium — https://access.redhat.com/security/cve/CVE-2011-3380
ubuntu medium CVE-2011-3380 medium priority: Ubuntu including 1 source packages (openswan), 5 status rows across 5 suites (hardy, lucid, maverick, natty, upstream): not-affected 4, needs-triage 1. https://ubuntu.com/security/CVE-2011-3380

NVD evaluator notes for CVE-2011-3380

Comment: Per: http://cwe.mitre.org/data/definitions/476.html 'CWE-476: NULL Pointer Dereference'

Affected software / configurations for CVE-2011-3380

Vendor Product Version Raw CPE
xelerance openswan 2.6.29 cpe:2.3:a:xelerance:openswan:2.6.29:*:*:*:*:*:*:*
xelerance openswan 2.6.30 cpe:2.3:a:xelerance:openswan:2.6.30:*:*:*:*:*:*:*
xelerance openswan 2.6.31 cpe:2.3:a:xelerance:openswan:2.6.31:*:*:*:*:*:*:*
xelerance openswan 2.6.32 cpe:2.3:a:xelerance:openswan:2.6.32:*:*:*:*:*:*:*
xelerance openswan 2.6.33 cpe:2.3:a:xelerance:openswan:2.6.33:*:*:*:*:*:*:*
xelerance openswan 2.6.34 cpe:2.3:a:xelerance:openswan:2.6.34:*:*:*:*:*:*:*
xelerance openswan 2.6.35 cpe:2.3:a:xelerance:openswan:2.6.35:*:*:*:*:*:*:*

References for CVE-2011-3380

cvelogic Threat Intelligence