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CVE-2015-1855

Date: November 29, 2019

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.

Language: Ruby

Severity Score

Related Resources (10)

https://puppetlabs.com/security/cve/cve-2015-1855
https://nvd.nist.gov/vuln/detail/CVE-2015-1855
https://www.ruby-lang.org/en/news/2015/04/13/ruby-openssl-hostname-matching-vulnerability/
http://www.debian.org/security/2015/dsa-3245
http://www.debian.org/security/2015/dsa-3246
http://www.debian.org/security/2015/dsa-3247
https://access.redhat.com/security/cve/CVE-2015-1855
https://bugs.ruby-lang.org/issues/9644
https://people.canonical.com/~ubuntu-security/cve/CVE-2015-1855
https://www.mend.io/vulnerability-database/CVE-2015-1855

Severity Score

Weakness Type (CWE)

Improper Input Validation

CWE-20

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): HIGH
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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