Kerio Personal Firewall up to 4.1.1 infinite loop

CVSS Meta Temp Score
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CTI Interest Score
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4.8$0-$5k0.00

Summaryinfo

A vulnerability was found in Kerio Personal Firewall up to 4.1.1. It has been rated as problematic. Affected by this issue is some unknown functionality. This manipulation causes infinite loop. This vulnerability is registered as CVE-2004-1109. Remote exploitation of the attack is possible. Furthermore, an exploit is available.

Detailsinfo

A vulnerability was found in Kerio Personal Firewall up to 4.1.1 (Firewall Software). It has been declared as problematic. Affected by this vulnerability is an unknown function. The manipulation with an unknown input leads to a infinite loop vulnerability. The CWE definition for the vulnerability is CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. As an impact it is known to affect availability. The summary by CVE is:

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.

The weakness was published 11/04/2004 by Karl Lynn (Website). It is possible to read the advisory at eeye.com. This vulnerability is known as CVE-2004-1109 since 11/30/2004. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are unknown but a public exploit is available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

After 5 days, there has been an exploit disclosed. It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept.

A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (17992), Exploit-DB (626), SecurityFocus (BID 11639†) and OSVDB (11582†). Similar entries are available at VDB-23367, VDB-24828, VDB-24259 and VDB-26629. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Infinite loop
CWE: CWE-835 / 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: no mitigation known
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Timelineinfo

11/04/2004 🔍
11/04/2004 +0 days 🔍
11/09/2004 +4 days 🔍
11/09/2004 +0 days 🔍
11/10/2004 +1 days 🔍
11/30/2004 +19 days 🔍
01/10/2005 +41 days 🔍
03/10/2015 +3711 days 🔍
07/22/2025 +3787 days 🔍

Sourcesinfo

Vendor: kerio.com

Advisory: eeye.com
Researcher: Karl Lynn
Status: Not defined
Confirmation: 🔍

CVE: CVE-2004-1109 (🔍)
GCVE (CVE): GCVE-0-2004-1109
GCVE (VulDB): GCVE-100-23695
X-Force: 17992 - Kerio Personal Firewall (KPF) packet processing denial of service
SecurityFocus: 11639 - Kerio Personal Firewall IP Options Denial Of Service Vulnerability
OSVDB: 11582 - Kerio Personal Firewall Multiple IP Option DoS

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

Entryinfo

Created: 03/10/2015 12:14
Updated: 07/22/2025 04:42
Changes: 03/10/2015 12:14 (56), 06/08/2017 23:46 (8), 07/22/2025 04:42 (22)
Complete: 🔍
Cache ID: 216:363:103

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