Author :
Mansour Moufid
Date :
2011-05-23 18:01:24
Hash :06c51cdf Message :Prevent size_t overflow in evhttp_htmlescape.
Modified the `html_replace' function so that it returns the length of
the replacement string instead of the string itself. This is used to
easily check for overflows of the `new_size' variable in the first for
loop of the `evhttp_htmlescape' function, and thus potential out of
bounds writes in the second for loop (if an overflow occurs in
new_size, then new_size < old_size). Also check that new_size + 1
doesn't overflow in mm_malloc(new_size + 1).
Removed the `scratch_space' variable from the `evhttp_htmlescape'
function since it wasn't actually used; also removed the `buf'
variable from the `evhttp_htmlescape' function since it was only used
by `scratch_space'.
Mansour Moufid