Lighttpd SA:
Lighttpd caches the rendered string for mtime. The cache key has as a default value 0. At that point the pointer to the string are still NULL. If a file with an mtime of 0 is requested it tries to access the pointer and crashes.
The bug requires that a malicious user can either upload files or manipulate the mtime of the files.
The bug was reported by cubiq and fixed by Marcus Rueckert.
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