CVE-2009-4441

What it is

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.

At a glance

Exploitability

Can be exploited over the network without logging in. Limited direct impact.

Exploit odds

2.5% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2009-12-28 19:30 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-16 23:13 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 2.5% in the next 30 days (EPSS).
• Severity: 5.0 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2009-12-28 19:30 UTC

Last modified

2026-06-16 23:13 UTC

Exploit probability

2.5% · EPSS, next 30 days

Record status

Modified

Affected

• Sun Java System Directory Server 6.0
• Sun Java System Directory Server 6.1
• Sun Java System Directory Server 6.2
• Sun Java System Directory Server 6.3
• Sun Java System Directory Server 6.3.1

Attack profile CVSS 2.0 · 5.0

Attack vector

Network

Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2009-4441.md and follow it. Check whether this project is affected by CVE-2009-4441. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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