CVE-2017-6181

Name: CVE-2017-6181
Creator: NVD / NIST
Published: 2017-04-03T05:59:00.847+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 3.65%

Last modified Jun 17, 2026

CVE-2017-6181 is a vulnerability of currently unknown severity. The parse_char_class function in regparse.c in the Onigmo (aka Oniguruma-mod) regular expression library, as used in Ruby 2.4.0, allows remote attackers to cause a denial of service (deep recursion and application crash) via a crafted regular expression.. EPSS estimates a 3.65% chance of exploitation in the next 30 days.

Description

The parse_char_class function in regparse.c in the Onigmo (aka Oniguruma-mod) regular expression library, as used in Ruby 2.4.0, allows remote attackers to cause a denial of service (deep recursion and application crash) via a crafted regular expression.

Metrics

EPSS Probability

3.65%

88.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Ruby-Lang	Ruby	2.4.0

References

http://www.securityfocus.com/bid/97304Third Party Advisory, VDB Entry
https://bugs.ruby-lang.org/issues/13234Issue Tracking, Vendor Advisory
https://bugs.ruby-lang.org/projects/ruby-trunk/repository/revisions/57660Issue Tracking, Vendor Advisory
http://www.securityfocus.com/bid/97304Third Party Advisory, VDB Entry
https://bugs.ruby-lang.org/issues/13234Issue Tracking, Vendor Advisory
https://bugs.ruby-lang.org/projects/ruby-trunk/repository/revisions/57660Issue Tracking, Vendor Advisory

Timeline

Published: Apr 3, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-6181?

How severe is CVE-2017-6181?

Severity scoring for CVE-2017-6181 is pending analysis. The EPSS model estimates a 3.65% probability of exploitation in the next 30 days.

How do I fix CVE-2017-6181?

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-2017-6181?

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

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Source: NVD / NIST