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CERT Coordination Center

WebEOC uses a global shared key

Vulnerability Note VU#388282

Original Release Date: 2005-07-13 | Last Revised: 2005-07-14


WebEOC installations may use the a common secret key to encrypt data. If an attacker can retrieve this key from one site, they will be able to decipher all data encoded with the key across all WebEOC installations.


WebEOC is a web-based crisis information management application that provides functions to gather, coordinate, and disseminate information between emergency personnel and Emergency Operations Centers (EOC). All WebEOC installations may use a common secret key to encrypt data. If an attacker can successfully recover this secret key from any WebEOC installation, they may be able to decrypt data on every other WebEOC installation.


If this shared key is recovered by an attacker, that attacker may be able to decrypt all data encrypted using that key in all WebEOC installations. Such data that may be compromised may include system settings, emergency/medical data, and authentication information.



Version 6.0.2 corrects this vulnerability. According to ESi:

This vulnerability has been addressed in version 6.0.2 by utilizing a key unique to every customer (these keys existed previously, but were not used). In addition, data encryption is now accomplished using Rinjndael-AES encryption algorithms and hashes are generated with SHA-512 algorithms.

To obtain WebEOC upgrades, contact ESi Technical Support.

Vendor Information


ESi Affected

Updated:  June 21, 2005



Vendor Statement

This vulnerability has been addressed in version 6.0.2.

Vendor Information

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


US-CERT has no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

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This document is based on technical analysis by IOActive and additional information from ESi. Thanks also to the City of Seattle for bringing this to our attention.

This document was written by Jeff Gennari.

Other Information

CVE IDs: None
Severity Metric: 3.54
Date Public: 2005-07-13
Date First Published: 2005-07-13
Date Last Updated: 2005-07-14 16:34 UTC
Document Revision: 89

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