CVE-2004-1109
The FWDRV.SYS driver in Kerio Personal Firewall 4.1.1 and earlier allows remote attackers to...
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.
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2004-1109- CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2004-1109- Updated
- 2026-11-02
EUVDEUVD-2004-1107 No score
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.
- Record
EUVD-2004-1107- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-vc3f-q7f5-f956 No score
The FWDRV.SYS driver in Kerio Personal Firewall 4.1.1 and earlier allows remote attackers to...
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.
- Record
GHSA-vc3f-q7f5-f956- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | Kerio Personal Firewall 4.1.1 - Multiple IP Options Denial of Service Vulnerabilities | 2004-11-12 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2004-1109 is a medium vulnerability (CVSS 5.0) in Kerio Personal Firewall, published December 1, 2004. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 3.24%, the 88th percentile. No source names a fixed version.