ISS BlackICE ping flood buffer overflow allows code execution

Risk
Medium

Date Discovered
02-04-2002

Description
Symantec is aware of a remote access buffer overflow condition existing in versions of ISS BlackICE and RealSecure firewall/IDS products that can potentially allow a remote attacker to execute arbitrary code with kernel-level access on targeted systems. 

Versions of ISS's BlackICE and RealSecure products running on Microsoft Windows 2000 and XP platforms allow a remote attacker to send a modified ping flood of fragmented ICMP echo request packets that can crash the targeted system upon which the firewall/IDS product resides or, if the packets are carefully crafted, allow the remote attacker to run arbitrary code with kernel-level privileges. 

While the risk to corporate systems may be limited since most corporate networks deny all ICMP packets from external addresses, small business and cable modem users could be at a high risk of system compromise since they would not normally be using additional perimeter firewalls as a part of a multi-layered network defense. 

There are no known publicly released exploits for this vulnerability at the time of this posting. This vulnerability was originally discovered by Matt Taylor.

Platforms Affected
Windows

Components Affected
Certain versions of Internet Security System's BlackIce Defender, BlackIce Agent for Server and Workstation, and RealSecure Network Sensor. 
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Recommendations
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References
Source: Internet Security Systems advise109 alerts
URL: http://www.iss.net/security_center/alerts/advise109.php

Source: eEye Digital Security AL20020208 advisories
URL: http://www.eeye.com/html/Research/Advisories/AL20020208.html

Source: Security Focus.com Internet Security Systems BlackICE and RealSecure Buffer Overflow Vulnerability
URL: http://securityfocus.com/bid/4025

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