CVE-2018-16395

An issue was discovered in the OpenSSL library in Ruby before 2.3.8, 2.4.x before 2.4.5, 2.5.x before 2.5.2, and 2.6.x before 2.6.0-preview3. When two OpenSSL::X509::Name objects are compared using ==, depending on the ordering, non-equal objects may return true. When the first argument is one character longer than the second, or the second argument contains a character that is one less than a character in the same position of the first argument, the result of == will be true. This could be leveraged to create an illegitimate certificate that may be accepted as legitimate and then used in signing or encryption operations.

CVSS v3.0 9.8 CRITICAL
CVSS v2.0 7.5 HIGH

9.8^/10

CVSS v3.0 : CRITICAL

V3 Legend

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

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.5^/10

CVSS v2.0 : HIGH

V2 Legend

Vector : AV:N/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://www.ruby-lang.org/en/news/2018/11/06/ruby-2-6-0-preview3-released/	Release Notes Vendor Advisory
https://www.ruby-lang.org/en/news/2018/10/17/ruby-2-5-2-released/	Release Notes Vendor Advisory
https://www.ruby-lang.org/en/news/2018/10/17/ruby-2-4-5-released/	Release Notes Vendor Advisory
https://www.ruby-lang.org/en/news/2018/10/17/ruby-2-3-8-released/	Release Notes Vendor Advisory
https://www.ruby-lang.org/en/news/2018/10/17/openssl-x509-name-equality-check-does-not-work-correctly-cve-2018-16395/	Mitigation Vendor Advisory
https://lists.debian.org/debian-lts-announce/2018/10/msg00020.html	Third Party Advisory
https://hackerone.com/reports/387250	Patch Third Party Advisory
https://www.debian.org/security/2018/dsa-4332	Third Party Advisory
https://usn.ubuntu.com/3808-1/	Third Party Advisory
http://www.securitytracker.com/id/1042105	Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2018:3738	Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3731	Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3730	Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3729	Third Party Advisory
https://security.netapp.com/advisory/ntap-20190221-0002/	Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html	Mailing List Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:1948	Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:2565
https://www.oracle.com/security-alerts/cpujan2020.html

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:ruby-lang:ruby::::::::
	cpe:2.3:a:ruby-lang:ruby::::::::
	cpe:2.3:a:ruby-lang:ruby::::::::
	cpe:2.3:a:ruby-lang:ruby:2.6.0:preview1::::::
	cpe:2.3:a:ruby-lang:ruby:2.6.0:preview2::::::
	cpe:2.3:a:ruby-lang:openssl::::::ruby::*

Configuration 2 (hide)

OR	cpe:2.3:o:canonical:ubuntu_linux:16.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:18.10:::::::*
	cpe:2.3:o:canonical:ubuntu_linux:14.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts:::

Configuration 3 (hide)

OR	cpe:2.3:o:debian:debian_linux:8.0:::::::*
	cpe:2.3:o:debian:debian_linux:9.0:::::::*

Configuration 4 (hide)

cpe:2.3:o:redhat:enterprise_linux:7.4:*:*:*:*:*:*:*

Information

Published : 2018-11-16 10:29

Updated : 2019-10-02 17:03

NVD link : CVE-2018-16395

Mitre link : CVE-2018-16395

JSON object : View

CWE

NVD-CWE-noinfo

Products Affected

ruby-lang

ruby
openssl

redhat

enterprise_linux

canonical

ubuntu_linux

debian

debian_linux

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When two OpenSSL::X509::Name objects are compared using ==, depending on the ordering, non-equal objects may return true. When the first argument is one character longer than the second, or the second argument contains a character that is one less than a character in the same position of the first argument, the result of == will be true. This could be leveraged to create an illegitimate certificate that may be accepted as legitimate and then used in signing or encryption operations."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2018-16395", "ASSIGNER": "cve@mitre.org"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 7.5, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "severity": "HIGH", "acInsufInfo": false, "impactScore": 6.4, "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}}, "publishedDate": "2018-11-16T18:29Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndIncluding": "2.3.7", "versionStartIncluding": "2.3.0"}, {"cpe23Uri": "cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndIncluding": "2.4.4", "versionStartIncluding": "2.4.0"}, {"cpe23Uri": "cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndIncluding": "2.5.1", "versionStartIncluding": "2.5.0"}, {"cpe23Uri": "cpe:2.3:a:ruby-lang:ruby:2.6.0:preview1:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:ruby-lang:ruby:2.6.0:preview2:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:a:ruby-lang:openssl:*:*:*:*:*:ruby:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "2.1.2"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*", "cpe_name": [], "vulnerable": true}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux:7.4:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2019-10-03T00:03Z"}

9.8 /10