CVE-2018-16395
7.5 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.3 High
AI Score
Confidence
High
0.008 Low
EPSS
Percentile
81.8%
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
References
lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html
www.securitytracker.com/id/1042105
access.redhat.com/errata/RHSA-2018:3729
access.redhat.com/errata/RHSA-2018:3730
access.redhat.com/errata/RHSA-2018:3731
access.redhat.com/errata/RHSA-2018:3738
access.redhat.com/errata/RHSA-2019:1948
access.redhat.com/errata/RHSA-2019:2565
hackerone.com/reports/387250
lists.debian.org/debian-lts-announce/2018/10/msg00020.html
security.netapp.com/advisory/ntap-20190221-0002/
usn.ubuntu.com/3808-1/
www.debian.org/security/2018/dsa-4332
www.oracle.com/security-alerts/cpujan2020.html
www.ruby-lang.org/en/news/2018/10/17/openssl-x509-name-equality-check-does-not-work-correctly-cve-2018-16395/
www.ruby-lang.org/en/news/2018/10/17/ruby-2-3-8-released/
www.ruby-lang.org/en/news/2018/10/17/ruby-2-4-5-released/
www.ruby-lang.org/en/news/2018/10/17/ruby-2-5-2-released/
www.ruby-lang.org/en/news/2018/11/06/ruby-2-6-0-preview3-released/
Related
7.5 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.3 High
AI Score
Confidence
High
0.008 Low
EPSS
Percentile
81.8%