CVE-2015-1855
MEDIUM severity · CVSS 5.9 · Improper input validation
5.9CVSS MEDIUM
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityHigh
Privileges requiredNone
User interactionNone
Confidentiality impactNone
Integrity impactHigh
Availability impactNone
Exploit probability (EPSS)3%
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Additional information
- NVD record
- https://www.ruby-lang.org/en/news/2015/04/13/ruby-openssl-hostname-matching-vulnerability/Advisory
- http://www.debian.org/security/2015/dsa-3245Advisory
- http://www.debian.org/security/2015/dsa-3246Advisory
- http://www.debian.org/security/2015/dsa-3247Advisory
- https://bugs.ruby-lang.org/issues/9644Advisory
- https://puppetlabs.com/security/cve/cve-2015-1855Advisory