McAfee E-Business Admin Server Invalid Data Length DoS Vulnerability
iDefense Security Advisory 04.17.07
Apr 17, 2007
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
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
Exploitation of this vulnerability allows an attacker to crash the
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 220.127.116.11 for Windows. Previous versions may
also be affected.
iDefense is currently unaware of any workarounds for this issue.
VI. VENDOR RESPONSE
McAfee has addressed this vulnerability with updated packages. More
information is available in McAfee's Security Bulletin 612751 at the
VII. CVE INFORMATION
A Mitre Corp. Common Vulnerabilities and Exposures (CVE) number has not
been assigned yet.
VIII. DISCLOSURE TIMELINE
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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X. LEGAL NOTICES
Copyright =A9 2007 iDefense, Inc.
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