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FrontPage Tips: Buffer overrun in Interpreter

The SmartHTML Interpreter (shtml.dll) is part of the FrontPage Server Extensions (FPSE) and provides support for Web forms and other FrontPage-based dynamic content. The interpreter contains a flaw that could be exposed when processing a request for a particular type of Web file, if the request had certain specific characteristics. This flaw affects the two versions of FrontPage Server Extensions differently. On FrontPage Server Extensions 2000, such a request would cause the interpreter to consume most or all CPU availability until the Web service was restarted.

An attacker could use this vulnerability to conduct a denial of service attack against an affected Web server. On FrontPage Server Extensions 2002, the same type of request could cause a buffer overrun, potentially allowing an attacker to run code of his choice.

C. Ramesh

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