An issue was discovered in Oniguruma 6.2.0, as used in...
Critical severity
Unreviewed
Published
May 14, 2022
to the GitHub Advisory Database
•
Updated Jan 27, 2023
Description
Published by the National Vulnerability Database
May 24, 2017
Published to the GitHub Advisory Database
May 14, 2022
Last updated
Jan 27, 2023
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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