McAfee e-Business Server is used to provide transparent encryption for corporate end users storing and sharing documents. It is composed of two utilities; a command line program that encrypts/decrypts data and manages the keyring, and an administration server that can be used to update user profiles and manage keys remotely. More information can be found on the vendor's web site at the following URL.
Remote exploitation of a denial of service (DoS) vulnerability in McAfee Inc.'s E-Business Server could allow an attacker to crash the administration server.
Prior to authentication, an attacker can crash the server by sending a malformed authentication packet. The server will read in a length from the packet header, and then attempt to read that many bytes from the buffer. By specifying a large length value and sending a small packet, the server can be caused to read off the end of mapped heap memory. This will trigger an exception that is not handled, and the server will exit.
Exploitation of this vulnerability allows an attacker to crash the administration server.
In this situation, the administrator will not be able to configure user profiles, or add/remove/manage keys.
It is important to note that the core functionality of this product is contained within the command line utility.
The command line utility would commonly be used by a web script that needs to encrypt/decrypt data, or by a SMTP gateway that transparently encrypts routed mail. This utility will continue to work regardless of whether the administration server is running or not.
iDefense has confirmed the existence of this vulnerability in McAfee E-Business Server version 188.8.131.52 for Windows. Previous versions may also be affected.
iDefense is currently unaware of any workarounds for this issue.
McAfee has addressed this vulnerability with updated packages. More information is available in McAfee's Security Bulletin 612751 at the following URL.
A Mitre Corp. Common Vulnerabilities and Exposures (CVE) number has not been assigned yet.
02/07/2007 Initial vendor notification
02/07/2007 Initial vendor response
04/17/2007 Coordinated public disclosure
The discoverer of this vulnerability wishes to remain anonymous.
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Copyright © 2007 Verisign, Inc.
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