CVE-2015-1855

Ubuntu Security Notice USN-3365-1

Severity Score

5.9

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

La función Verified_certificate_identity en la extensión OpenSSL en Ruby versiones anteriores a 2.0.0 patchlevel 645, versiones 2.1.x anteriores a 2.1.6 y versiones 2.2.x anteriores 2.2.2, no comprueba apropiadamente los nombres de host, lo que permite a atacantes remotos falsificar servidores por medio de vectores relacionados con (1) múltiples wildcards, (1) wildcards en nombres IDNA, (3) sensibilidad a mayúsculas y minúsculas y (4) caracteres no ASCII.

It was discovered that Ruby DL::dlopen incorrectly handled opening libraries. An attacker could possibly use this issue to open libraries with tainted names. This issue only applied to Ubuntu 14.04 LTS. Tony Arcieri, Jeffrey Walton, and Steffan Ullrich discovered that the Ruby OpenSSL extension incorrectly handled hostname wildcard matching. This issue only applied to Ubuntu 14.04 LTS. Christian Hofstaedtler discovered that Ruby Fiddle::Handle incorrectly handled certain crafted strings. An attacker could use this issue to cause a denial of service, or possibly execute arbitrary code. This issue only applied to Ubuntu 14.04 LTS. Various other issues were also addressed.

*Credits: N/A

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2015-02-17 CVE Reserved
2015-05-04 CVE Published
2017-03-14 First Exploit
2024-08-06 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-20: Improper Input Validation

CAPEC

References (7)

URL	Tag	Source
http://www.debian.org/security/2015/dsa-3245	Third Party Advisory
http://www.debian.org/security/2015/dsa-3246	Third Party Advisory
http://www.debian.org/security/2015/dsa-3247	Third Party Advisory
https://bugs.ruby-lang.org/issues/9644	Third Party Advisory
https://puppetlabs.com/security/cve/cve-2015-1855	Third Party Advisory

URL	Date	SRC
https://github.com/vpereira/CVE-2015-1855	2017-03-14

URL	Date	SRC

URL	Date	SRC
https://www.ruby-lang.org/en/news/2015/04/13/ruby-openssl-hostname-matching-vulnerability	2020-09-30

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Ruby-lang Search vendor "Ruby-lang"		Ruby Search vendor "Ruby-lang" for product "Ruby"				>= 2.1.0 < 2.1.6 Search vendor "Ruby-lang" for product "Ruby" and version " >= 2.1.0 < 2.1.6"		-		Affected
Ruby-lang Search vendor "Ruby-lang"		Ruby Search vendor "Ruby-lang" for product "Ruby"				>= 2.2.0 < 2.2.2 Search vendor "Ruby-lang" for product "Ruby" and version " >= 2.2.0 < 2.2.2"		-		Affected
Ruby-lang Search vendor "Ruby-lang"		Ruby Search vendor "Ruby-lang" for product "Ruby"				2.0.0 Search vendor "Ruby-lang" for product "Ruby" and version "2.0.0"		-		Affected
Ruby-lang Search vendor "Ruby-lang"		Ruby Search vendor "Ruby-lang" for product "Ruby"				2.0.0 Search vendor "Ruby-lang" for product "Ruby" and version "2.0.0"		p0		Affected
Ruby-lang Search vendor "Ruby-lang"		Ruby Search vendor "Ruby-lang" for product "Ruby"				2.0.0 Search vendor "Ruby-lang" for product "Ruby" and version "2.0.0"		p195		Affected
Ruby-lang Search vendor "Ruby-lang"		Ruby Search vendor "Ruby-lang" for product "Ruby"				2.0.0 Search vendor "Ruby-lang" for product "Ruby" and version "2.0.0"		p247		Affected
Ruby-lang Search vendor "Ruby-lang"		Ruby Search vendor "Ruby-lang" for product "Ruby"				2.0.0 Search vendor "Ruby-lang" for product "Ruby" and version "2.0.0"		p353		Affected
Ruby-lang Search vendor "Ruby-lang"		Ruby Search vendor "Ruby-lang" for product "Ruby"				2.0.0 Search vendor "Ruby-lang" for product "Ruby" and version "2.0.0"		p451		Affected
Ruby-lang Search vendor "Ruby-lang"		Ruby Search vendor "Ruby-lang" for product "Ruby"				2.0.0 Search vendor "Ruby-lang" for product "Ruby" and version "2.0.0"		p481		Affected
Ruby-lang Search vendor "Ruby-lang"		Ruby Search vendor "Ruby-lang" for product "Ruby"				2.0.0 Search vendor "Ruby-lang" for product "Ruby" and version "2.0.0"		p576		Affected
Ruby-lang Search vendor "Ruby-lang"		Ruby Search vendor "Ruby-lang" for product "Ruby"				2.0.0 Search vendor "Ruby-lang" for product "Ruby" and version "2.0.0"		p594		Affected
Ruby-lang Search vendor "Ruby-lang"		Ruby Search vendor "Ruby-lang" for product "Ruby"				2.0.0 Search vendor "Ruby-lang" for product "Ruby" and version "2.0.0"		p598		Affected
Ruby-lang Search vendor "Ruby-lang"		Ruby Search vendor "Ruby-lang" for product "Ruby"				2.0.0 Search vendor "Ruby-lang" for product "Ruby" and version "2.0.0"		p643		Affected
Ruby-lang Search vendor "Ruby-lang"		Trunk Search vendor "Ruby-lang" for product "Trunk"				< 50292 Search vendor "Ruby-lang" for product "Trunk" and version " < 50292"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				7.0 Search vendor "Debian" for product "Debian Linux" and version "7.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0"		-		Affected
Puppet Search vendor "Puppet"		Puppet Agent Search vendor "Puppet" for product "Puppet Agent"				1.0.0 Search vendor "Puppet" for product "Puppet Agent" and version "1.0.0"		-		Affected
Puppet Search vendor "Puppet"		Puppet Enterprise Search vendor "Puppet" for product "Puppet Enterprise"				>= 3.0.0 < 3.8.0 Search vendor "Puppet" for product "Puppet Enterprise" and version " >= 3.0.0 < 3.8.0"		-		Affected