CVEvulnerability

CVE-2018-16395

9.8 CRITICAL Published 2018-11-16 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2018-11-16
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.0 ([email protected])
9.8 CRITICAL — CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
7.5 HIGH — AV:N/AC:L/Au:N/C:P/I:P/A:P

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.

Affected configurations

• ruby-lang openssl (< 2.1.2) • ruby-lang ruby (>= 2.3.0 <= 2.3.7) • ruby-lang ruby (>= 2.4.0 <= 2.4.4) • ruby-lang ruby (>= 2.5.0 <= 2.5.1) • ruby-lang ruby 2.6.0 • canonical ubuntu linux 14.04 • canonical ubuntu linux 16.04 • canonical ubuntu linux 18.04 • canonical ubuntu linux 18.10 • debian debian linux 8.0 • debian debian linux 9.0 • redhat enterprise linux 7.4

References