Kerio Personal Firewall Authentication memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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7.0$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in Kerio Personal Firewall. This impacts an unknown function of the component Authentication. The manipulation leads to memory corruption. This vulnerability is listed as CVE-2003-0220. The attack may be initiated remotely. In addition, an exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Kerio Personal Firewall (Firewall Software) (the affected version is unknown). It has been rated as critical. This issue affects an unknown code of the component Authentication. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Buffer overflow in the administrator authentication process for Kerio Personal Firewall (KPF) 2.1.4 and earlier allows remote attackers to execute arbitrary code via a handshake packet.

The bug was discovered 03/03/2003. The weakness was presented 04/28/2003 by Emiliano Kargieman, Hernán Gips and Javier Burroni with Core Security Technologies (Website). The advisory is shared at securiteam.com. The identification of this vulnerability is CVE-2003-0220 since 04/28/2003. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are unknown but a public exploit is available.

A public exploit has been developed in Perl Module and been published immediately after the advisory. The exploit is available at metasploit.com. It is declared as highly functional. The vulnerability was handled as a non-public zero-day exploit for at least 56 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 11575 (Kerio Personal Firewall Administrator Authentication Handshake Packet Remote Buffer Overflow), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Firewalls and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 122223 (Kerio Personal Firewall Remote Authentication Packet Buffer Overflow Vulnerability).

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at kerio.com. The best possible mitigation is suggested to be upgrading to the latest version. Attack attempts may be identified with Snort ID 11266. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 3529.

The vulnerability is also documented in the databases at X-Force (11899), Exploit-DB (28), Tenable (11575), SecurityFocus (BID 7180†) and OSVDB (6294†). See VDB-54 for similar entry. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
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: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Highly functional
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 11575
Nessus Name: Kerio Personal Firewall Administrator Authentication Handshake Packet Remote Buffer Overflow
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 11575
OpenVAS Name: Kerio personal Firewall buffer overflow
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

MetaSploit ID: kerio_auth.rb
MetaSploit Name: Kerio Firewall 2.1.4 Authentication Packet Overflow
MetaSploit File: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Patch: kerio.com

Snort ID: 11266
Snort Message: EXPLOIT Kerio Personal Firewall authentication buffer overflow attempt
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

PaloAlto IPS: 🔍

Timelineinfo

03/03/2003 🔍
04/28/2003 +56 days 🔍
04/28/2003 +0 days 🔍
04/28/2003 +0 days 🔍
04/28/2003 +0 days 🔍
04/28/2003 +0 days 🔍
05/06/2003 +8 days 🔍
05/12/2003 +6 days 🔍
05/12/2003 +0 days 🔍
10/19/2003 +160 days 🔍
04/09/2004 +172 days 🔍
08/23/2025 +7806 days 🔍

Sourcesinfo

Vendor: kerio.com

Advisory: securiteam.com⛔
Researcher: Emiliano Kargieman, Hernán Gips , Javier Burroni
Organization: Core Security Technologies
Status: Confirmed

CVE: CVE-2003-0220 (🔍)
GCVE (CVE): GCVE-0-2003-0220
GCVE (VulDB): GCVE-100-53
CERT: 🔍
X-Force: 11899
SecurityFocus: 7180 - Kerio Personal Firewall Remote Authentication Packet Buffer Overflow Vulnerability
OSVDB: 6294 - Kerio Personal Firewall Administrator Authentication Handshake Packet Remote Overflow
Vulnerability Center: 2631 - Buffer Overflow in Kerio Personal Firewall <2.1.4 via Handshake Packet, High

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

Entryinfo

Created: 04/28/2003 02:00
Updated: 08/23/2025 01:56
Changes: 04/28/2003 02:00 (101), 06/25/2019 18:47 (1), 10/29/2024 01:54 (18), 08/23/2025 01:56 (2)
Complete: 🔍
Cache ID: 216:2A8:103

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

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