Apache HTDigest Realm Command Line Argument Buffer Overflow Vulnerability

A buffer overflow vulnerability exists in the htdigest utility included with Apache. The vulnerability is due to improper bounds checking when copying user-supplied realm data into local buffers.

By supplying an overly long realm value to the command line options of htdigest, it is possible to trigger an overflow condition. This may cause memory to be corrupted with attacker-specified values.

This issue could be exploited by a remote attacker; potentially resulting in the execution of arbitrary system commands within the context of the web server process.


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