View at Official ubuntu advisory, NVD, CVE.org · CVE detail
Freshness: upstream tracker timestamp is available; use API updated time as primary recency signal.
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.
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.