CVE-2004-2652: Sourcefire Snort

High severity, CVSS 7.8. EPSS: 11.2% chance of exploitation in the next 30 days.

The DecodeTCPOptions function in decode.c in Snort before 2.3.0, when printing TCP/IP options using FAST output or verbose mode, allows remote attackers to cause a denial of service (crash) via packets with invalid TCP/IP options, which trigger a null dereference.

Affected products

• Sourcefire Snort: version 2.1.0 only; version 2.1.1_rc1 only; version 2.1.3 only; version 2.2 only

Published 2004-12-31. Last modified 2026-06-16.