CVE-2009-4441: Sun Java System Directory Server

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

Directory Proxy Server (DPS) in Sun Java System Directory Server Enterprise Edition 6.0 through 6.3.1 does not enable the SO_KEEPALIVE socket option, which makes it easier for remote attackers to cause a denial of service (connection slot exhaustion) via multiple connections, aka Bug Id 6782659.

Affected products

• Sun Java System Directory Server: version 6.0 only; version 6.1 only; version 6.2 only; version 6.3 only; version 6.3.1 only

Published 2009-12-28. Last modified 2026-06-16.