A vulnerability has been reported in Mongoose, which can be exploited by malicious people to cause a DoS (Denial of Service) or compromise a vulnerable system.
The vulnerability is caused due to an error in the "put_dir()" function (mongoose.c) when processing HTTP PUT web requests. This can be exploited to cause an assertion error or a stack-based buffer overflow.
Successful exploitation may allow execution of arbitrary code, but requires the server to be compiled with the "-DNDEBUG" option.
The vulnerability is reported in version 3.0. Other versions may also be affected.
Solution: Fixed in the Mercurial repository.
Provided and/or discovered by: Reported by Nico Golde to the oss-sec mailing list.
Original Advisory: http://seclists.org/oss-sec/2011/q3/267
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Subject: Mongoose HTTP PUT Request Processing Vulnerability
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