Kerio WinRoute Firewall DNS response denial of service

kerio-dns-dos (29629)

Medium Risk

Description:

Kerio WinRoute Firewall is vulnerable to a denial of service attack, caused by the improper handling of malformed DNS (Domain Name System) responses. A remote attacker could send a specially-crafted DNS response to cause the firewall to crash.

*CVSS:

Base Score:	5
Access Vector:	Remote
Access Complexity:	Low
Authentication:	Not Required
Confidentiality Impact:	None
Integrity Impact:	None
Availability Impact:	Complete
Temporal Score:	3.7
Exploitability:	Unproven
Remediation Level:	Official-Fix
Report Confidence:	Confirmed

Consequences:

Denial of Service

Remedy:

Upgrade to the latest version of Kerio WinRoute Firewall (6.2.3 or later), available from the Kerio Technologies Inc. Web site. See References.

References:

• Kerio Technologies Inc. Web site: Kerio Technologies Inc. | Kerio WinRoute Firewall | Release History.
• Kerio Technologies Inc. Web site: Kerio Technologies Inc. | Kerio WinRoute Firewall | Download.
• BID-20584: Kerio WinRoute Firewall Denial of Service Vulnerability
• CVE-2006-5420: Kerio WinRoute Firewall 6.2.2 and earlier allows remote attackers to cause a denial of service (crash) via malformed DNS responses.
• SA22986: Kerio WinRoute Firewall DNS Response Denial of Service
• SECTRACK ID: 1017067: Kerio WinRoute Firewall Can Be Crashed With a Specially Crafted DNS Response
• VUPEN/ADV-2006-4056: Kerio WinRoute Firewall DNS Response Handling Denial of Service Vulnerability

Platforms Affected:

• Kerio Kerio WinRoute Firewall 6.2.2 and prior

Reported:

Oct 12, 2006

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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