HOMEVULNERABILITIESCVE-2004-1109
MEDIUMPOC

CVE-2004-1109

NVD-CWE-OtherPublished: January 10, 2005· Updated: Jun 16, 2026

5.0
CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2004-1109 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A proof-of-concept (PoC) exploit exists for CVE-2004-1109. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityNone
IntegrityNone
AvailabilityP
AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected Vendors & Products

kerio1 product(s)
personal firewall
Source: NVD CPE · 8 total CPE entries

Exploit & PoC Resources

POC AVAILABLEProof-of-concept code exists
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://www.securityfocus.com/bid/11639
PATCHhttp://www.securityfocus.com/bid/11639
ADVISORYhttp://www.kerio.com/security_advisory.html
ADVISORYhttp://www.kerio.com/security_advisory.html

All References (8)

→
http://www.eeye.com/html/research/advisories/AD20041109.html
→
http://www.kerio.com/security_advisory.htmlVendor Advisory
→
http://www.securityfocus.com/bid/11639Exploit · Patch · Vendor Advisory
→
https://exchange.xforce.ibmcloud.com/vulnerabilities/17992
→
http://www.eeye.com/html/research/advisories/AD20041109.html
→
http://www.kerio.com/security_advisory.htmlVendor Advisory
→
http://www.securityfocus.com/bid/11639Exploit · Patch · Vendor Advisory
→
https://exchange.xforce.ibmcloud.com/vulnerabilities/17992

Quick Facts

CVE IDCVE-2004-1109
CVSS Score5.0 / 10
SeverityMEDIUM
WeaknessNVD-CWE-Other
CISA KEVNo
ExploitPOC
Affected1 vendor(s)
PublishedJan 10, 2005

Related CVEs (NVD-CWE-Other)

CVE-2002-1468
10.0
CVE-1999-0745
10.0
CVE-2001-1080
10.0
CVE-1999-1405
10.0
CVE-2002-0747
10.0
CVE-2007-1015
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2004-1109 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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