The Secure Elements Class 5 AVR server fails to properly authenticate "session start" messages. This may allow an attacker to cause the server to initiate TCP connections to arbitrary destinations, which can cause a denial of service to both the server and the specified target.
Class 5 AVR
Secure Elements Class 5 AVR (Automated Vulnerability Remediation) is a security product that monitors and enforces security policies on network assets. Class 5 AVR is now known as C5 EVM (Enterprise Vulnerability Management). The Class 5 AVR software includes both server and client components.
Class 5 AVR client
The Class 5 AVR client listens on
60000/udp and an additional tcp port. This client receives commands sent by the Class 5 AVR server.
Class 5 AVR server
The Class 5 AVR server is available as an appliance or as software that runs on commodity hardware. The Class 5 AVR server contains information about network assets, vulnerabilities, and remediation history.
The Class 5 AVR server fails to properly authenticate "session start" messages.
A remote, unauthenticated attacker may be able to cause the server to initiate TCP connections to arbitrary destinations, which can cause a denial of service to both the server and the specified target.
Upgrade or patch
This issue has been resolved in C5 EVM 2.8.1.
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Notified: February 06, 2006 Updated: May 30, 2006
Remediation in C5 EVM version 2.8.1 and above
C5 EVM Sensor registrations are invalidated when a Denial Of Service (DOS) attack is suspected / detected.
The vendor has not provided us with any further information regarding this vulnerability.
Group | Score | Vector
Base | |
Temporal | |
Environmental | |
Thanks to the NOAA N-CIRT Lab for reporting this vulnerability.
This document was written by Will Dormann.
CVE IDs: | None
Severity Metric: | 0.31
Date Public: | 2006-05-30
Date First Published: | 2006-05-30
Date Last Updated: | 2007-05-04 18:52 UTC
Document Revision: | 7