CVE-2009-2409

What it is

The Network Security Services (NSS) library before 3.12.3, as used in Firefox; GnuTLS before 2.6.4 and 2.7.4; OpenSSL 0.9.8 through 0.9.8k; and other products support MD2 with X.509 certificates, which might allow remote attackers to spoof certificates by using MD2 design flaws to generate a hash collision in less than brute-force time. NOTE: the scope of this issue is currently limited because the amount of computation required is still large.

At a glance

Exploitability

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

Exploit odds

4.3% chance of exploitation in the next 30 days (EPSS).

Fix

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

Timeline

1. 2009-07-30 19:30 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-16 23:09 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 4.3% in the next 30 days (EPSS).
• Severity: 5.1 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2009-07-30 19:30 UTC

Last modified

2026-06-16 23:09 UTC

Exploit probability

4.3% · EPSS, next 30 days

Weakness

CWE-295 · Improper certificate validation

Record status

Modified

Affected

• Gnu Gnutls < 2.6.4
• Gnu Gnutls < 2.7.4
• Mozilla Network Security Services < 3.12.3
• OpenSSL ≤ 0.9.8k

Attack profile CVSS 2.0 · 5.1

Attack vector

Network

Complexity

High

Authentication

None

Confidentiality

Partial

Integrity

Partial

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-2009-2409.md and follow it. Check whether this project is affected by CVE-2009-2409. 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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