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Vulnerability details

9.8/10
CVSS 3.0
CVE-2017-9225
resolved Published 2017-05-24 Updated 2026-06-17
NVD MITRE OpenCVE
Vulnerability Data from Dependency-Track
Affected versions
Scores
9.8 CVSS 3.0 NVD CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H displayed
7.5 CVSS 2.0 NVD AV:N/AC:L/Au:N/C:P/I:P/A:P
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 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.
Analysis Read only
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