An issue was discovered in Oniguruma 6.2.0, as used in...
Critical severity
Unreviewed
Published
May 17, 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 17, 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 stack out-of-bounds write in onigenc_unicode_get_case_fold_codes_by_str() occurs during regular expression compilation. Code point 0xFFFFFFFF is not properly handled in unicode_unfold_key(). A malformed regular expression could result in 4 bytes being written off the end of a stack buffer of expand_case_fold_string() during the call to onigenc_unicode_get_case_fold_codes_by_str(), a typical stack buffer overflow.
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