CVE-2004-1109

Exp

The FWDRV.SYS driver in Kerio Personal Firewall 4.1.1 and earlier allows remote attackers to cause a denial of service (CPU consumption and system freeze from infinite loop) via a (1) TCP, (2) UDP, or (3) ICMP packet with a zero length IP Option field.

Published: 2005-01-10 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2004-1109 is rated High Exploit Risk (63.7/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 3.24%). 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-2004-1109

EDB-ID Source Kind Published Link
626 exploit_db edb 2004-11-12 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2004-1109

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 2026-06-15 4.89% 3.24% -1.66%
2 2025-03-30 4.97% 4.89% -0.08%
3 2025-03-29 — 4.97% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2004-1109

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P 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:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2004-1109

Affected software / configurations for CVE-2004-1109

Vendor Product Version Raw CPE
kerio personal_firewall 4.0.6 cpe:2.3:a:kerio:personal_firewall:4.0.6:*:*:*:*:*:*:*
kerio personal_firewall 4.0.7 cpe:2.3:a:kerio:personal_firewall:4.0.7:*:*:*:*:*:*:*
kerio personal_firewall 4.0.8 cpe:2.3:a:kerio:personal_firewall:4.0.8:*:*:*:*:*:*:*
kerio personal_firewall 4.0.9 cpe:2.3:a:kerio:personal_firewall:4.0.9:*:*:*:*:*:*:*
kerio personal_firewall 4.0.10 cpe:2.3:a:kerio:personal_firewall:4.0.10:*:*:*:*:*:*:*
kerio personal_firewall 4.0.16 cpe:2.3:a:kerio:personal_firewall:4.0.16:*:*:*:*:*:*:*
kerio personal_firewall 4.1 cpe:2.3:a:kerio:personal_firewall:4.1:*:*:*:*:*:*:*
kerio personal_firewall 4.1.1 cpe:2.3:a:kerio:personal_firewall:4.1.1:*:*:*:*:*:*:*

References for CVE-2004-1109

cvelogic Threat Intelligence