CVE-2017-6181 : The parse_char_class function in regparse.c in the Onigmo (aka Oniguruma-mod) regular expression library, as used in Rub

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.

Published 2017-04-03 05:59:01

Updated 2017-04-11 13:47:24

Source MITRE

View at NVD, CVE.org

Vulnerability category: Input validationDenial of service

Threat overview for CVE-2017-6181

Top countries where our scanners detected CVE-2017-6181

Top open port discovered on systems with this issue 80

IPs affected by CVE-2017-6181 72

Threat actors abusing to this issue? Yes

Find out if you^* are affected by CVE-2017-6181!

^*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2017-6181

Probability of exploitation activity in the next 30 days: 0.39%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 70 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2017-6181

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:N/I:N/A:P	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
7.5	HIGH	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	3.9	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2017-6181

CWE-20 Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2017-6181

http://www.securityfocus.com/bid/97304

Ruby CVE-2017-6181 Denial of Service Vulnerability
Third Party Advisory;VDB Entry
https://bugs.ruby-lang.org/projects/ruby-trunk/repository/revisions/57660

Redmine 404 error
Issue Tracking;Vendor Advisory
https://bugs.ruby-lang.org/issues/13234

Bug #13234: Infinite recursion (stack overflow) in parse_char_class() - Ruby master - Ruby Issue Tracking System
Issue Tracking;Vendor Advisory

Products affected by CVE-2017-6181