The FWDRV.SYS driver in Kerio Personal Firewall 4.1.1 and earlier allows remote attackers…
Priority LOW 29Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
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.
Why it matters now
EPSS 0.03236 88th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 8
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:kerio:personal_firewall:4.0.6:*:*:*:*:*:*:* | 4.0.6 | Vulnerable | Kerio |
| cpe:2.3:a:kerio:personal_firewall:4.0.7:*:*:*:*:*:*:* | 4.0.7 | Vulnerable | Kerio |
| cpe:2.3:a:kerio:personal_firewall:4.0.8:*:*:*:*:*:*:* | 4.0.8 | Vulnerable | Kerio |
| cpe:2.3:a:kerio:personal_firewall:4.0.9:*:*:*:*:*:*:* | 4.0.9 | Vulnerable | Kerio |
| cpe:2.3:a:kerio:personal_firewall:4.0.10:*:*:*:*:*:*:* | 4.0.10 | Vulnerable | Kerio |
| cpe:2.3:a:kerio:personal_firewall:4.0.16:*:*:*:*:*:*:* | 4.0.16 | Vulnerable | Kerio |
| cpe:2.3:a:kerio:personal_firewall:4.1:*:*:*:*:*:*:* | 4.1 | Vulnerable | Kerio |
| cpe:2.3:a:kerio:personal_firewall:4.1.1:*:*:*:*:*:*:* | 4.1.1 | Vulnerable | Kerio |
- cpe:2.3:a:kerio:personal_firewall:4.0.6:*:*:*:*:*:*:* Versions 4.0.6 Vulnerable ·Kerio
- cpe:2.3:a:kerio:personal_firewall:4.0.7:*:*:*:*:*:*:* Versions 4.0.7 Vulnerable ·Kerio
- cpe:2.3:a:kerio:personal_firewall:4.0.8:*:*:*:*:*:*:* Versions 4.0.8 Vulnerable ·Kerio
- cpe:2.3:a:kerio:personal_firewall:4.0.9:*:*:*:*:*:*:* Versions 4.0.9 Vulnerable ·Kerio
- cpe:2.3:a:kerio:personal_firewall:4.0.10:*:*:*:*:*:*:* Versions 4.0.10 Vulnerable ·Kerio
- cpe:2.3:a:kerio:personal_firewall:4.0.16:*:*:*:*:*:*:* Versions 4.0.16 Vulnerable ·Kerio
- cpe:2.3:a:kerio:personal_firewall:4.1:*:*:*:*:*:*:* Versions 4.1 Vulnerable ·Kerio
- cpe:2.3:a:kerio:personal_firewall:4.1.1:*:*:*:*:*:*:* Versions 4.1.1 Vulnerable ·Kerio
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2004-1109
- 2026-10-03 Alias added: GHSA-vc3f-q7f5-f956
References
More Kerio Personal Firewall vulnerabilities
- TI-2005-01000 The administration protocol for Kerio WinRoute Firewall 6.x up to 6.0.10, Personal… CVSS 2.0HIGH 7.5
- TI-2003-01391 Kerio Personal Firewall (KPF) 2.1.4 has a default rule to accept incoming packets from… CVSS 2.0HIGH 7.5
- TI-2004-02200 Kerio Personal Firewall (KPF) 2.1.5 allows local users to execute arbitrary code with… CVSS 2.0HIGH 7.2
- TI-2006-04969 The (1) fwdrv.sys and (2) khips.sys drivers in Sunbelt Kerio Personal Firewall 4.3.268… CVSS 2.0MEDIUM 5.0
- TI-2005-01001 The administration protocol for Kerio WinRoute Firewall 6.x up to 6.0.10, Personal… CVSS 2.0MEDIUM 5.0
- TI-2002-02074 Kerio Personal Firewall (KPF) 2.1.4 and earlier allows remote attackers to cause a denial… CVSS 2.0MEDIUM 5.0
Sources
- CVE-2004-1109 · CVE Program
- CVE-2004-1109 · NVD
- FIRST EPSS
- GHSA-vc3f-q7f5-f956 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences