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Secure Elements Class 5 AVR client fails to properly validate the size of EM_GET_CE_PARAMETER messages

Vulnerability Note VU#227929

Original Release Date: 2006-05-30 | Last Revised: 2006-06-07


The Secure Elements Class 5 AVR client fails to properly handle the size of EM_GET_CE_PARAMETER messages. This may allow an attacker to cause a buffer overflow and reveal process memory.


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 problem

The Class 5 AVR client fails to properly handle the size of EM_GET_CE_PARAMETER messages.


A remote attacker may be able to view contents of process memory on a vulnerable system.


Upgrade or patch
This issue has been resolved in C5 EVM 2.8.1.

Vendor Information


Secure Elements Affected

Notified:  February 06, 2006 Updated: May 30, 2006



Vendor Statement

Remediation in C5 EVM version 2.8.1 and above

The C5 EVM Sensor now guards against the possibility of a buffer overflow. The actual size of certain buffers are now calculated and compared to what is reported. The buffer is also initialized to zero's.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

CVSS Metrics

Group Score Vector



Thanks to the NOAA N-CIRT Lab for reporting this vulnerability.

This document was written by Will Dormann.

Other Information

CVE IDs: None
Severity Metric: 0.50
Date Public: 2006-05-30
Date First Published: 2006-05-30
Date Last Updated: 2006-06-07 02:51 UTC
Document Revision: 6

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