CVE-2008-4551: Strongswan

Medium severity, CVSS 5.0. EPSS: 2.5% chance of exploitation in the next 30 days.

strongSwan 4.2.6 and earlier allows remote attackers to cause a denial of service (daemon crash) via an IKE_SA_INIT message with a large number of NULL values in a Key Exchange payload, which triggers a NULL pointer dereference for the return value of the mpz_export function in the GNU Multiprecision Library (GMP).

Affected products

• Strongswan Strongswan: up to and including 4.2.6; version 2.0.0 only; version 2.0.1 only; version 2.0.2 only; version 2.1.0 only; version 2.1.1 only; …

Published 2008-10-14. Last modified 2026-06-16.