CVE-2011-4073: Xelerance Openswan

Medium severity, CVSS 4.0. EPSS: 2.1% chance of exploitation in the next 30 days.

Use-after-free vulnerability in the cryptographic helper handler functionality in Openswan 2.3.0 through 2.6.36 allows remote authenticated users to cause a denial of service (pluto IKE daemon crash) via vectors related to the (1) quick_outI1_continue and (2) quick_outI1 functions.

Affected products

• Xelerance Openswan: version 2.3.0 only; version 2.3.1 only; version 2.4.0 only; version 2.4.1 only; version 2.4.2 only; version 2.4.3 only; …

Published 2011-11-17. Last modified 2026-06-16.