Vulnerability 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 Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ruby-Lang | Openssl | < 2.1.2 |
| Ruby-Lang | Ruby | >= 2.3.0, <= 2.3.7 |
| Canonical | Ubuntu Linux | 14.04 |
| Debian | Debian Linux | 8.0 |
| Redhat | Enterprise Linux | 7.4 |
References
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.htmlMailing ListThird Party Advisory
- http://www.securitytracker.com/id/1042105Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:3729Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3730Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3731Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3738Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1948Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:2565
- https://hackerone.com/reports/387250PatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/10/msg00020.htmlThird Party Advisory
- https://security.netapp.com/advisory/ntap-20190221-0002/Third Party Advisory
- https://usn.ubuntu.com/3808-1/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4332Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2020.html
- https://www.ruby-lang.org/en/news/2018/10/17/openssl-x509-name-equality-check-doMitigationVendor Advisory
FAQ
What is CVE-2018-16395?
CVE-2018-16395 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 ==...
How severe is CVE-2018-16395?
CVE-2018-16395 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2018-16395?
Check the references section above for vendor advisories and patch information. Affected products include: Ruby-Lang Openssl, Ruby-Lang Ruby, Canonical Ubuntu Linux, Debian Debian Linux, Redhat Enterprise Linux.