CVE-2013-2053: Xelerance Openswan

Medium severity, CVSS 6.8. EPSS: 2.4% chance of exploitation in the next 30 days.

Buffer overflow in the atodn function in Openswan before 2.6.39, when Opportunistic Encryption is enabled and an RSA key is being used, allows remote attackers to cause a denial of service (pluto IKE daemon crash) and possibly execute arbitrary code via crafted DNS TXT records. NOTE: this might be the same vulnerability as CVE-2013-2052 and CVE-2013-2054.

Affected products

• Xelerance Openswan: up to and including 2.6.38; version 2.6.01 only; version 2.6.02 only; version 2.6.03 only; version 2.6.04 only; version 2.6.05 only; …

Published 2013-07-09. Last modified 2026-06-16.