search menu icon-carat-right cmu-wordmark

CERT Coordination Center

Secure Elements Class 5 AVR client generates predictable CEIDs

Vulnerability Note VU#353945

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

Overview

The Secure Elements Class 5 AVR client generates predictable CEIDs. This may allow an attacker to guess the unique identifier of a protected asset.

Description

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 is identified by a property called the CEID. This identifier is predictable.

Impact

An attacker may be able to leverage the knowledge of a client's CEID to aid in the completion of other attacks on Class 5 AVR.

Solution

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

Vendor Information

353945
 

Secure Elements Affected

Notified:  November 29, 2005 Updated: May 24, 2006

Status

Affected

Vendor Statement

Remediation in C5 EVM version 2.8.1 and above

The CEID produced by the C5 EVM Sensor now contains a random generated component.

Vendor Information

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


CVSS Metrics

Group Score Vector
Base
Temporal
Environmental

References

Acknowledgements

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: 0.08
Date Public: 2006-05-30
Date First Published: 2006-05-30
Date Last Updated: 2006-06-07 02:54 UTC
Document Revision: 12

Sponsored by CISA.