| Package | Affected versions | Patched versions |
|---|---|---|
| oniguruma | = 6.2.0 | |
| php | ≥ 5.6.0, < 5.6.31≥ 7.0.0, < 7.0.21≥ 7.1.0, < 7.1.7 | 5.6.317.0.217.1.7 |
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.
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