Computer Associates eTrust Intrusion Detection Denial of Service
iDefense Security Advisory 02.27.07
Feb 27, 2007
Computer Associates eTrust Intrusion Detection is a network intrusion
management and prevention system, that includes real-time session
monitoring and Internet web filtering capabilities. More information can
be found on the vendors site at the following URL.
The eTrust Intrusion Detection process listens on TCP port 9191 for remote
administration functions. Administrator login requires that keys be
exchanged including a session key with blowfish encryption of the login
and the password.
Since the administration server fails to properly validate the key length
value, it is possible to cause the product to crash. During decryption, 4
is subtracted from the specified length and the result used as the length
of the data to decrypt. The decryption loop will proceed to overwrite the
entire heap segment. This leads to an unhandled exception.
Exploitation of this vulnerability allows attackers to cause the
service to crash.
Since the heap is not used once corrupted, the heap overflow cannot be
exploited for more than a denial of service.
iDefense has confirmed this vulnerability in Computer Associates eTrust
Intrusion Detection version 126.96.36.199. Other versions are suspected
iDefense is not aware of any workarounds for this issue.
VI. VENDOR RESPONSE
Computer Associates has issued patches to correct this vulnerability. More
information is available in their advisory which can be found at the
VII. CVE INFORMATION
The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2007-1005 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org/), which standardizes names for
VIII. DISCLOSURE TIMELINE
01/16/2007 Initial vendor notification
01/16/2007 Initial vendor response
02/27/2007 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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Disclaimer: The information in the advisory is believed to be accurate at
the time of publishing based on currently available information. Use of
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