# CVE-2018-16395: libruby2.5: 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....

CVE-2018-16395 is fixed in 2 products on 1 platform, first by libruby2.5 2.5.1-1ubuntu1.1, released October 25, 2018. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2018-16395
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.1072
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 25, 2018

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libruby2.5 Ubuntu 18.04.6 LTS (bionic) | 2.5.1-1ubuntu1.1 | [libruby2.5 2.5.1-1ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libruby2.5-2.5.1-1ubuntu1.1.md) | Oct 25, 2018 |
| Linux | ruby2.5 Ubuntu 18.04.6 LTS (bionic) | 2.5.1-1ubuntu1.1 | [ruby2.5 2.5.1-1ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-ruby2.5-2.5.1-1ubuntu1.1.md) | Oct 25, 2018 |

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