CVE-2017-9229

Name: CVE-2017-9229
Creator: NVD / NIST
Published: 2017-05-24T15:29:00.417+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 5.13%

Last modified Jun 17, 2026

CVE-2017-9229 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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 SIGSEGV occurs in left_adjust_char_head() during regular expression compilation. EPSS estimates a 5.13% chance of exploitation in the next 30 days.

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 SIGSEGV occurs in left_adjust_char_head() during regular expression compilation. Invalid handling of reg->dmax in forward_search_range() could result in an invalid pointer dereference, normally as an immediate denial-of-service condition.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

5.13%

91.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-476

Affected Software

Vendor	Product	Versions
Oniguruma Project	Oniguruma	6.2.0
Php	Php	<= 7.1.5
Ruby-Lang	Ruby	<= 2.4.1
Php	Php	>= 5.6.0, < 5.6.31
Php	Php	>= 7.0.0, < 7.0.21
Php	Php	>= 7.1.0, < 7.1.7

References

https://access.redhat.com/errata/RHSA-2018:1296Third Party Advisory
https://github.com/kkos/oniguruma/commit/b690371bbf97794b4a1d3f295d4fb9a8b05d402dPatch, Third Party Advisory
https://github.com/kkos/oniguruma/issues/59Exploit, Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1296Third Party Advisory
https://github.com/kkos/oniguruma/commit/b690371bbf97794b4a1d3f295d4fb9a8b05d402dPatch, Third Party Advisory
https://github.com/kkos/oniguruma/issues/59Exploit, Third Party Advisory

Timeline

Published: May 24, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-9229?

How severe is CVE-2017-9229?

CVE-2017-9229 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 5.13% probability of exploitation in the next 30 days.

How do I fix CVE-2017-9229?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-9229?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST