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Fencer Vulns
medium 4.3

CVE-2009-3641 json

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…

published 2009-10-28 17 y ago modified 2026-06-16 4 mo ago also EUVD-2009-3616

cvss
4.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
38.8%
EPSS 38.8% chance of exploitation in 30 days, percentile 98%
public exploits
2
Exploit-DB

Summary

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.

Patch / fix

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2009-3641 updated cvss 4.3

Snort: DoS (crash) while printing specially-crafted IPv6 packet using the -v option

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (EDB-33306)
  2. Published

Exploit prediction

38.78% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-33306 Snort 2.8.5 - Multiple Denial of Service Vulnerabilities dos, 2009-10-22
  • EDB-9969 Snort 2.8.5 - IPv6 Denial of Service dos, 2009-10-23
  • securityfocus.com http://www.securityfocus.com/bid/36795 referenced PoC, tagged "exploit" by a source, unverified
  • seclists.org http://seclists.org/fulldisclosure/2009/Oct/299 referenced PoC, tagged "exploit" by a source, unverified
  • bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=530863 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.