CVE-2003-0209

Exp

Integer overflow in the TCP stream reassembly module (stream4) for Snort 2.0 and earlier allows remote attackers to execute arbitrary code via large sequence numbers in packets, which enable a heap-based buffer overflow.

Published: 2003-05-05 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2003-0209 is rated High Exploit Risk (84.3/100): CVSS Critical severity, with high exploitation likelihood (EPSS 57.43%, 98th percentile). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2003-0209

EDB-ID Source Kind Published Link
18 exploit_db edb 2003-04-23 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2003-0209

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-09-16 64.41% 57.43% -6.98%
2 2025-03-30 45.97% 64.41% +18.44%
3 2025-03-29 — 45.97% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2003-0209

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
10.0 2.0 HIGH
AV:N/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 10.0 [email protected]

Weakness enumeration for CVE-2003-0209

Affected software / configurations for CVE-2003-0209

Vendor Product Version Raw CPE
smoothwall smoothwall 2.0_beta_4 cpe:2.3:a:smoothwall:smoothwall:2.0_beta_4:*:*:*:*:*:*:*
sourcefire snort 1.8 cpe:2.3:a:sourcefire:snort:1.8:*:*:*:*:*:*:*
sourcefire snort 1.8.1 cpe:2.3:a:sourcefire:snort:1.8.1:*:*:*:*:*:*:*
sourcefire snort 1.8.2 cpe:2.3:a:sourcefire:snort:1.8.2:*:*:*:*:*:*:*
sourcefire snort 1.8.3 cpe:2.3:a:sourcefire:snort:1.8.3:*:*:*:*:*:*:*
sourcefire snort 1.8.4 cpe:2.3:a:sourcefire:snort:1.8.4:*:*:*:*:*:*:*
sourcefire snort 1.8.5 cpe:2.3:a:sourcefire:snort:1.8.5:*:*:*:*:*:*:*
sourcefire snort 1.8.6 cpe:2.3:a:sourcefire:snort:1.8.6:*:*:*:*:*:*:*
sourcefire snort 1.8.7 cpe:2.3:a:sourcefire:snort:1.8.7:*:*:*:*:*:*:*
sourcefire snort 1.9 cpe:2.3:a:sourcefire:snort:1.9:*:*:*:*:*:*:*
sourcefire snort 1.9.1 cpe:2.3:a:sourcefire:snort:1.9.1:*:*:*:*:*:*:*

References for CVE-2003-0209

cvelogic Threat Intelligence