Rule:

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Sid:
5683

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Summary:
This event is generated when an attempt is made to exploit a known vulnerability in ISS RealSecure/BlackICE products using Server Message Block (SMB).

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Impact:
Serious. Execution of arbitrary code leading to unauthorized administrative access to the target host. Denial of Service (DoS) is also possible.

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Detailed Information:
RealSecure and BlackICE are host and network based Intrusion Detection and Prevention systems from ISS.

SMB is a client - server protocol used in sharing resources such as files, printers, ports, named pipes and other things, between machines on a network.

A vulnerability in the processing of SMB messages in ISS RealSecure/BlackICE exists due to a programming error which may present an attacker with the opportunity to exploit the host system and run code of their choosing on an affected system. The attacker may then cause a DoS condition in the service or possibly gain unauthorized access to the target host.

A long username in an authentication request causes a heap overflow to occur when an affected system tries to process the request.

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Affected Systems:
RealSecure Network 7.0, XPU 20.15 through 22.9
RealSecure Server Sensor 7.0 XPU 20.16 through 22.9
Proventia A Series XPU 20.15 through 22.9
Proventia G Series XPU 22.3 through 22.9
Proventia M Series XPU 1.3 through 1.7
RealSecure Desktop 7.0 eba through ebh
RealSecure Desktop 3.6 ebr through ecb
RealSecure Guard 3.6 ebr through ecb
RealSecure Sentry 3.6 ebr through ecb
BlackICE PC Protection 3.6 cbr through ccb
BlackICE Server Protection 3.6 cbr through ccb

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Attack Scenarios:
An attacker can supply extra data in the username field of an authentication request to overflow the buffer, code of their choosing can then be run on the host system.

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Ease of Attack:
Simple.

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False Positives:
None known.

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False Negatives:
None known.

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Corrective Action:
Apply the appropriate vendor supplied patches.

Upgrade to the latest non-affected version of the software.

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Contributors:
Sourcefire Vulnerability Research Team
Brian Caswell <bmc@sourcefire.com>
Nigel Houghton <nigel.houghton@sourcefire.com>

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Additional References:

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