Home/CVE/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
CVE

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

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.

MEDIUM · CVSS 5.9 EPSS 0.0272
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules3 YARA rules0
⬡

Weakness Classification

CWE-20Improper Input Validation
▤

Affected Products & Versions

7
ruby-lang ruby>= 2.1.0 and < 2.1.6
ruby-lang ruby>= 2.2.0 and < 2.2.2
ruby-lang rubyall versions
ruby-lang trunk< 50292
debian linuxall versions
puppet agentall versions
puppet enterprise>= 3.0.0 and < 3.8.0
◈

Sigma Hunt Rules

3
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productmediumRuby on Rails Framework Exceptions
productmediumPotential Ruby Reverse Shell
productmediumRuby Inline Command Execution
▣

Scoring & Timeline

5.9
MEDIUM · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD29 Nov 2019 · 09:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
⚑

Vendor Advisories

6
suse-csafopenSUSE-SU-2024:10090-1
suse-csafopenSUSE-SU-2024:10481-1
usnUSN-3365-1
suse-csafSUSE-SU-2017:1067-1
suse-csafSUSE-SU-2017:0948-1
🔗

References & Sources

6
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.debian.org/security/2015/dsa-3245Third Party Advisory
http://www.debian.org/security/2015/dsa-3246Third Party Advisory
http://www.debian.org/security/2015/dsa-3247Third Party Advisory
https://bugs.ruby-lang.org/issues/9644Third Party Advisory
https://puppetlabs.com/security/cve/cve-2015-1855Third Party Advisory
https://www.ruby-lang.org/en/news/2015/04/13/ruby-openssl-hostname-matching-vulnerability/Vendor Advisory
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