CVE-2018-16395 Information

Description

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 Vector

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

Reference

http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html http://www.securitytracker.com/id/1042105 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://hackerone.com/reports/387250 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/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8