CVE-2017-9225

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.

How to fix CVE-2017-9225

To remediate CVE-2017-9225, upgrade the affected package to a fixed version below.

• —upgrade to 6.1.3-2 or later

Is CVE-2017-9225 being exploited?

Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.

Affected packages (1)

• from 0, < 6.1.3-2

CVSS scores

References (1)

• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2017-9225