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authorJason A. Donenfeld <Jason@zx2c4.com>2015-11-24 11:28:00 +0100
committerJason A. Donenfeld <Jason@zx2c4.com>2015-11-24 11:31:43 +0100
commit4458abf64172a62b92810c2293450106e6dfc763 (patch)
tree92a3f3587e85c11c77d11769a45d55ddb2fd81a6 /ui-refs.h
parentabout-formatting.sh: comment text out of date (diff)
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filter: avoid integer overflow in authenticate_post
ctx.env.content_length is an unsigned int, coming from the
CONTENT_LENGTH environment variable, which is parsed by strtoul. The
HTTP/1.1 spec says that "any Content-Length greater than or equal to
zero is a valid value." By storing this into an int, we potentially
overflow it, resulting in the following bounding check failing, leading
to a buffer overflow.

Reported-by: Erik Cabetas <Erik@cabetas.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
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