Heap Overflow in PCRE

[Hanno Böck <hanno () hboeck de>]

https://blog.fuzzing-project.org/29-Heap-Overflow-in-PCRE.html

The Perl Compatible Regular Expressions (PCRE) library has just
released a new version which fixes a number of security issues.

Fuzzing the pcretest tool uncovered an input leading to a heap overflow
in the function pcre_exec. This bug was found with the help of american
fuzzy lop and address sanitizer.
https://bugs.exim.org/show_bug.cgi?id=1637 Upstream bug #1637 (PoC and
ASAN trace attached there)

This is fixed in PCRE 8.38. There are two variants of PCRE, the classic
one and PCRE2. PCRE2 is not affected.
https://lists.exim.org/lurker/message/20151123.125009.80e5ac05.en.html

Appart from that a couple of other vulnerabilities found by other
people have been fixed in this release:
https://bugs.exim.org/show_bug.cgi?id=1672
Heap overflow in compile_regex
https://bugs.exim.org/show_bug.cgi?id=1515
Stack overflow in compile_regex
https://bugs.exim.org/show_bug.cgi?id=1667
Heap overflow in compile_regex

If you use PCRE to parse untrusted inputs you should update immediately.


-- 
Hanno Böck
http://hboeck.de/

mail/jabber: hanno () hboeck de
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