Kerio WinRoute Firewall up to 6.2.2 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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5.0$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Kerio WinRoute Firewall up to 6.2.2. This vulnerability affects unknown code. Performing a manipulation results in denial of service. This vulnerability is identified as CVE-2006-5420. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Kerio WinRoute Firewall up to 6.2.2 (Firewall Software). This affects some unknown processing. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:

Kerio WinRoute Firewall 6.2.2 and earlier allows remote attackers to cause a denial of service (crash) via malformed DNS responses.

The bug was discovered 10/12/2006. The weakness was released 10/20/2006 (Website). It is possible to read the advisory at vupen.com. This vulnerability is uniquely identified as CVE-2006-5420 since 10/19/2006. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available.

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 8 days. During that time the estimated underground price was around $0-$5k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 34051 (Kerio WinRoute Firewall Denial of Service).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at X-Force (29629), SecurityFocus (BID 20584†), OSVDB (30563†), Secunia (SA22986†) and SecurityTracker (ID 1017067†). Entries connected to this vulnerability are available at VDB-27411, VDB-28417, VDB-28416 and VDB-27665. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Vendor

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.0

VulDB Base Score: 5.3
VulDB Temp Score: 5.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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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: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/12/2006 🔍
10/12/2006 +0 days 🔍
10/16/2006 +4 days 🔍
10/17/2006 +1 days 🔍
10/19/2006 +2 days 🔍
10/20/2006 +1 days 🔍
10/20/2006 +0 days 🔍
10/31/2006 +11 days 🔍
03/12/2015 +3054 days 🔍
04/25/2026 +4062 days 🔍

Sourcesinfo

Vendor: kerio.com

Advisory: vupen.com⛔
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2006-5420 (🔍)
GCVE (CVE): GCVE-0-2006-5420
GCVE (VulDB): GCVE-100-32871
X-Force: 29629
SecurityFocus: 20584 - Kerio WinRoute Firewall Denial of Service Vulnerability
Secunia: 22986
OSVDB: 30563 - Kerio - WinRoute Firewall - Denial of Service Issue
SecurityTracker: 1017067
Vulnerability Center: 13001 - Kerio WinRoute Firewall Denial of Service via Malformed DNS Responses, Medium
Vupen: ADV-2006-4056

See also: 🔍

Entryinfo

Created: 03/12/2015 22:21
Updated: 04/25/2026 02:43
Changes: 03/12/2015 22:21 (58), 07/10/2019 10:36 (11), 06/15/2025 22:13 (18), 04/25/2026 02:43 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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