CVE-2003-0209: Integer overflow in the TCP stream reassembly module (stream4) for Snort 2.0 and earlier allows remote atta...

Security readout for executives and security teams

This flaw affects very old Snort intrusion detection deployments. A hostile network packet could trigger memory corruption in Snort’s TCP stream reassembly code and potentially run code on the sensor. Business risk is highest where legacy Snort sensors still monitor untrusted traffic. Exposure is likely limited to obsolete Snort 2.0 or earlier deployments, embedded appliances, abandoned sensors, or old distribution packages. Modern maintained Snort deployments are less likely exposed, but asset owners should verify versions rather than assume removal. Prioritize as a legacy exposure issue with high impact. It is unlikely in current managed environments, but any remaining old Snort sensor could become an entry point because it processes untrusted network traffic by design. Mitigation focus: Identify and retire Snort 2.0 and earlier sensors.; Apply Snort or operating-system vendor security updates.; Check CERT, Debian, Gentoo, Mandriva, and Snort advisories for supported upgrade paths..

Prepared

Jun 30, 2026, 11:41 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.