cve/2017/CVE-2017-9228.md

CVE-2017-9228

Description

An issue was discovered in Oniguruma 6.2.0, as used in Oniguruma-mod in Ruby through 2.4.1 and mbstring in PHP through 7.1.5. A heap out-of-bounds write occurs in bitset_set_range() during regular expression compilation due to an uninitialized variable from an incorrect state transition. An incorrect state transition in parse_char_class() could create an execution path that leaves a critical local variable uninitialized until it's used as an index, resulting in an out-of-bounds write memory corruption.

POC

Reference

No PoCs from references.

Github

• https://github.com/balabit-deps/balabit-os-7-libonig
• https://github.com/balabit-deps/balabit-os-8-libonig
• https://github.com/onivim/esy-oniguruma