Back
CVE-2015-1855
verify_certificate_identity in the OpenSSL extension in Ruby before 2.0.0 patchlevel 645, 2.1.x before 2.1.6, and 2.2.x before 2.2.2 does…
Medium5.9EPSS 2.8%
- Published
- Updated
- Reserved
- Assigned by
- redhat
Description
verify_certificate_identity in the OpenSSL extension in Ruby before 2.0.0 patchlevel 645, 2.1.x before 2.1.6, and 2.2.x before 2.2.2 does not properly validate hostnames, which allows remote attackers to spoof servers via vectors related to (1) multiple wildcards, (1) wildcards in IDNA names, (3) case sensitivity, and (4) non-ASCII characters.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N |
- EPSS (exploitation in 30 days)
- 2.8% · top 13% of all CVEs (4 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.9.
Weakness
Affected products
References (6)
- http://www.debian.org/security/2015/dsa-3247 (opens in a new tab)x_refsource_MISCx_transferred
- http://www.debian.org/security/2015/dsa-3245 (opens in a new tab)x_refsource_MISCx_transferred
- http://www.debian.org/security/2015/dsa-3246 (opens in a new tab)x_refsource_MISCx_transferred
- https://www.ruby-lang.org/en/news/2015/04/13/ruby-openssl-hostname-matching-vulnerability/ (opens in a new tab)x_refsource_MISCx_transferred
- https://puppetlabs.com/security/cve/cve-2015-1855 (opens in a new tab)x_refsource_MISCx_transferred
- https://bugs.ruby-lang.org/issues/9644 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2015-1855)Record last updated .