1 Description: CVE-2014-8964, heap buffer overflow
2 Heap buffer overflow if an assertion with a zero minimum repeat is used as
3 the condition in a conditional group.
4 Origin: upstream http://bugs.exim.org/show_bug.cgi?id=1546
5 Bug: http://bugs.exim.org/show_bug.cgi?id=1546
6 Applied-Upstream: Yes, after 8.36
8 This patch header follows DEP-3: http://dep.debian.net/deps/dep3/
11 @@ -1404,8 +1404,11 @@
14 /* Advance ecode past the assertion to the start of the first branch,
15 - but adjust it so that the general choosing code below works. */
16 + but adjust it so that the general choosing code below works. If the
17 + assertion has a quantifier that allows zero repeats we must skip over
18 + the BRAZERO. This is a lunatic thing to do, but somebody did! */
20 + if (*ecode == OP_BRAZERO) ecode++;
21 ecode += GET(ecode, 1);
22 while (*ecode == OP_ALT) ecode += GET(ecode, 1);
23 ecode += 1 + LINK_SIZE - PRIV(OP_lengths)[condcode];