Kerio Personal Firewall 4.x URL denial of service

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Kerio Personal Firewall 4.x. The affected element is an unknown function of the component URL Handler. This manipulation with the input %12/%13 causes denial of service. The identification of this vulnerability is CVE-2004-1907. It is possible to initiate the attack remotely. Furthermore, there is an exploit available. It is recommended to disable the affected component.

Detailsinfo

A vulnerability has been found in Kerio Personal Firewall 4.x (Firewall Software) and classified as problematic. Affected by this vulnerability is an unknown functionality of the component URL Handler. The manipulation with the input value %12/%13 leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. The summary by CVE is:

The Web Filtering functionality in Kerio Personal Firewall (KPF) 4.0.13 allows remote attackers to cause a denial of service (crash) by sending hex-encoded URLs containing "%13%12%13".

The bug was discovered 04/06/2004. The weakness was shared 04/09/2004 by Emmanouel Kellinis with Cipher.org (Website). The advisory is shared at cipher.org.uk. This vulnerability is known as CVE-2004-1907 since 05/04/2005. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known. MITRE ATT&CK project uses the attack technique T1499 for this issue.

It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $0-$5k.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at kerio.com.

The vulnerability is also documented in the databases at X-Force (15821), Exploit-DB (23925), SecurityFocus (BID 10075†), OSVDB (5009†) and Secunia (SA11331†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.9
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Disable
Status: 🔍

0-Day Time: 🔍

Patch: kerio.com

Timelineinfo

04/06/2004 🔍
04/07/2004 +1 days 🔍
04/09/2004 +2 days 🔍
04/09/2004 +0 days 🔍
04/13/2004 +3 days 🔍
12/31/2004 +262 days 🔍
05/04/2005 +124 days 🔍
07/17/2025 +7379 days 🔍

Sourcesinfo

Vendor: kerio.com

Advisory: cipher.org.uk
Researcher: Emmanouel Kellinis
Organization: Cipher.org
Status: Confirmed

CVE: CVE-2004-1907 (🔍)
GCVE (CVE): GCVE-0-2004-1907
GCVE (VulDB): GCVE-100-589
X-Force: 15821 - Kerio Personal Firewall Web filtering denial of service, Medium Risk
SecurityFocus: 10075 - Kerio Personal Firewall Web Filtering Remote Denial Of Service Vulnerability
Secunia: 11331 - Kerio Personal Firewall URL Handling Denial of Service, Moderately Critical
OSVDB: 5009 - Kerio Personal Firewall Web Filtering URL Handling DoS
SecuriTeam: securiteam.com

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 04/13/2004 11:55
Updated: 07/17/2025 17:03
Changes: 04/13/2004 11:55 (77), 06/28/2019 08:36 (1), 07/17/2025 17:03 (28)
Complete: 🔍
Cache ID: 216:432:103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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