| Package | Affected versions | Patched versions |
|---|---|---|
| oniguruma | = 6.2.0 | |
| php | ≥ 7.0.0, < 7.0.21≥ 7.1.0, < 7.1.7< 5.6.31 | 7.0.217.1.75.6.31 |
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 or read occurs in next_state_val() during regular expression compilation. Octal numbers larger than 0xff are not handled correctly in fetch_token() and fetch_token_in_cc(). A malformed regular expression containing an octal number in the form of '\700' would produce an invalid code point value larger than 0xff in next_state_val(), resulting in an out-of-bounds write memory corruption.
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