CVE-2009-1386

5.0 MEDIUM 80% exploit odds Fix listed Memory safety

What it is

ssl/s3_pkt.c in OpenSSL before 0.9.8i allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a DTLS ChangeCipherSpec packet that occurs before ClientHello.

At a glance

Exploitability: Can be exploited over the network without logging in. Limited direct impact.
Exploit odds: 80.1% chance of exploitation in the next 30 days (EPSS). Higher than most.
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2009-06-04 16:30 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 23:07 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 80.1% in the next 30 days (EPSS).
Severity: 5.0 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2009-06-04 16:30 UTC
Last modified: 2026-06-16 23:07 UTC
Exploit probability: 80.1% · EPSS, next 30 days
Weakness: CWE-476 · NULL pointer dereference
Record status: Modified

Affected

OpenSSL < 0.9.8i
Redhat OpenSSL 0.9.6-15
Redhat OpenSSL 0.9.6b-3
Redhat OpenSSL 0.9.7a-2
Canonical Ubuntu Linux 6.06
Canonical Ubuntu Linux 8.04
Canonical Ubuntu Linux 8.10
Canonical Ubuntu Linux 9.04

Attack profile CVSS 2.0 · 5.0

Attack vector: Network
Complexity: Low
Authentication: None
Confidentiality: None
Integrity: None
Availability: Partial

Raw vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

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-2009-1386.md and follow it. Check whether this project is affected by CVE-2009-1386. 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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Fix and advisories

References

NVD record · CVE.org record