CVE-2009-3641

4.3 MEDIUM 39% exploit odds Fix listed Denial of service Network gear

What it is

Snort before 2.8.5.1, when the -v option is enabled, allows remote attackers to cause a denial of service (application crash) via a crafted IPv6 packet that uses the (1) TCP or (2) ICMP protocol.

At a glance

Exploitability: Can be exploited over the network without logging in. Limited direct impact.
Exploit odds: 38.8% 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

2009-10-28 14:30 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 23:12 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 38.8% in the next 30 days (EPSS).
Severity: 4.3 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2009-10-28 14:30 UTC
Last modified: 2026-06-16 23:12 UTC
Exploit probability: 38.8% · EPSS, next 30 days
Record status: Modified

Affected

Snort ≤ 2.8.3.5
Snort 1.6
Snort 1.8.0
Snort 1.8.1
Snort 1.8.2
Snort 1.8.3
Snort 1.8.4
Snort 1.8.5

Attack profile CVSS 2.0 · 4.3

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

Raw vector

AV:N/AC:M/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-2009-3641.md and follow it. Check whether this project is affected by CVE-2009-3641. 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