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Security Advisories: GSA_kwCzR0hTQS1tbXJxLTY5OTktNzJ2OM4AASvC

Ruby Openssl Allows Incorrect Value Comparison

An issue was discovered in the OpenSSL library in Ruby 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.

Permalink: https://github.com/advisories/GHSA-mmrq-6999-72v8
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1tbXJxLTY5OTktNzJ2OM4AASvC
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Critical
Classification: General
Published: over 2 years ago
Updated: over 1 year ago

CVSS Score: 9.8
CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Identifiers: GHSA-mmrq-6999-72v8, CVE-2018-16395
References:

• https://nvd.nist.gov/vuln/detail/CVE-2018-16395
• https://hackerone.com/reports/387250
• https://access.redhat.com/errata/RHSA-2018:3729
• https://access.redhat.com/errata/RHSA-2018:3730
• https://access.redhat.com/errata/RHSA-2018:3731
• https://access.redhat.com/errata/RHSA-2018:3738
• https://access.redhat.com/errata/RHSA-2019:1948
• https://access.redhat.com/errata/RHSA-2019:2565
• https://lists.debian.org/debian-lts-announce/2018/10/msg00020.html
• https://security.netapp.com/advisory/ntap-20190221-0002/
• https://usn.ubuntu.com/3808-1/
• https://www.debian.org/security/2018/dsa-4332
• https://www.oracle.com/security-alerts/cpujan2020.html
• https://www.ruby-lang.org/en/news/2018/10/17/openssl-x509-name-equality-check-does-not-work-correctly-cve-2018-16395/
• https://www.ruby-lang.org/en/news/2018/10/17/ruby-2-3-8-released/
• https://www.ruby-lang.org/en/news/2018/10/17/ruby-2-4-5-released/
• https://www.ruby-lang.org/en/news/2018/10/17/ruby-2-5-2-released/
• https://www.ruby-lang.org/en/news/2018/11/06/ruby-2-6-0-preview3-released/
• http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html
• https://github.com/ruby/openssl/commit/f653cfa43f0f20e8c440122ea982382b6228e7f5
• https://github.com/rubysec/ruby-advisory-db/blob/master/gems/openssl/CVE-2018-16395.yml
• https://web.archive.org/web/20211206015239/https://securitytracker.com/id/1042105
• https://github.com/advisories/GHSA-mmrq-6999-72v8

Repository: https://github.com/ruby/openssl
Blast Radius: 32.1

Affected Packages