The Secure Elements Class 5 AVR client fails to properly validate a message's target CEID. This makes attacks easier, as the attacker does not need to guess the victim's true CEID.
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 client does not validate the CEID of a message it receives.
An attacker does not need to guess the true CEID of a victim asset.
Upgrade or patch
This issue has been resolved in C5 EVM 2.8.1.
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Affected Unknown __ Unaffected
Notified: February 06, 2006 Updated: May 26, 2006
Remediation in C5 EVM version 2.8.1 and above
The C5 EVM Sensor now validates that the CEID of the incoming message matches its own CEID.
The vendor has not provided us with any further information regarding this vulnerability.
Group | Score | Vector
Base | N/A | N/A
Temporal | N/A | N/A
Environmental | | N/A
Thanks to the NOAA N-CIRT Lab for reporting this vulnerability.
This document was written by Will Dormann.
CVE IDs: | None
Severity Metric:** | 0.30
Date Public: | 2006-05-30
Date First Published: | 2006-05-30
Date Last Updated: | 2006-06-07 02:49 UTC
Document Revision: | 6