This is an exploit for a previously undisclosed vulnerability in the bit string decoding code in the Microsoft ASN.1 library. This vulnerability is not related to the bit string vulnerability described in eEye advisory AD20040210-2. Both vulnerabilities were fixed in the MS04-007 patch. You are only allowed one attempt with this vulnerability. If the payload fails to execute, the LSASS system service will crash and the target system will automatically reboot itself in 60 seconds. If the payload succeeeds, the system will no longer be able to process authentication requests, denying all attempts to login through SMB or at the console. A reboot is required to restore proper functioning of an exploited system. This exploit has been successfully tested with the win32/*/reverse_tcp payloads, however a few problems were encounted when using the equivalent bind payloads. Your mileage may vary.
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© 2012 Packet Storm. All rights reserved.
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