CVE-2017-9226

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 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.

How to fix CVE-2017-9226

To remediate CVE-2017-9226, upgrade the affected package to a fixed version below.

• —upgrade to 5.6.31-r0 or later
• —upgrade to 6.1.3-2 or later

Is CVE-2017-9226 being exploited?

Low — EPSS is 1.2%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 5.6.31-r0
• from 0, < 6.1.3-2

CVSS scores

References (2)

• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2017-9226
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2017-9226