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CVE-2015-1855

MEDIUM
5.9
CVSS Score
Published: November 29, 2019 at 08:46 PM UTC
Updated: June 17, 2026 at 12:23 AM UTC
5 products affected across 3 vendorsDebian LinuxRubyPuppet Enterprise

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Severity
MEDIUM5.9
Exploit prediction
EPSS 3%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux· Debiandrupal
95%
7.08.09.0
Puppet Agent· Puppet
95%
1.0.0
Puppet Enterprise· Puppet
95%
3.0.0 ≤ v < 3.8.0
Affected range stops below 3.8.0, so it looks safe — our inference, not a vendor statement
Ruby· Ruby Langrubygems
95%
v < 2.0.0v < 2.2.22.1 ≤ v < 2.1.62.1.0 ≤ v < 2.1.62.2.0 ≤ v < 2.2.22.0.02.0.0 p02.0.0 p1952.0.0 p2472.0.0 p3532.0.0 p4512.0.0 p4812.0.0 p5762.0.0 p5942.0.0 p5982.0.0 p643
Affected range stops below 2.0.0, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.1.6, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.2.2, so it looks safe — our inference, not a vendor statement
Trunk· Ruby Lang
95%
v < 50292
Affected range stops below 50292, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (6)

x_refsource_MISCThird Party Advisory
Source: [email protected]
http://www.debian.org/security/2015/dsa-3245
x_refsource_MISCThird Party Advisory
Source: [email protected]
http://www.debian.org/security/2015/dsa-3246
x_refsource_MISCThird Party Advisory
Source: [email protected]
http://www.debian.org/security/2015/dsa-3247
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://bugs.ruby-lang.org/issues/9644
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://puppetlabs.com/security/cve/cve-2015-1855
x_refsource_MISCVendor Advisory
Source: [email protected]
https://www.ruby-lang.org/en/news/2015/04/13/ruby-openssl-hostname-matching-vulnerability/

CVSS

5.9MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-20

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