CVE-2015-3900

rubygems: DNS hijacking vulnerability in api_endpoint()

Severity Score

8.6

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

RubyGems 2.0.x before 2.0.16, 2.2.x before 2.2.4, and 2.4.x before 2.4.7 does not validate the hostname when fetching gems or making API requests, which allows remote attackers to redirect requests to arbitrary domains via a crafted DNS SRV record, aka a "DNS hijack attack."

RubyGems 2.0.x en versiones anteriores a 2.0.16, 2.2.x en versiones anteriores a 2.2.4 y 2.4.x en versiones anteriores a 2.4.7 no valida el nombre de host al recuperar gemas o hacer solicitudes de API, lo que permite a atacantes remotos redireccionar peticiones a dominios arbitrarios a través del registro DNS SRV manipulado, también conocido como un "ataque de secuestro de DNS".

A flaw was found in a way rubygems verified the API endpoint hostname retrieved through a DNS SRV record. A man-in-the-middle attacker could use this flaw to force a client to download content from an untrusted domain.

Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text files and to perform system management tasks. A flaw was found in a way rubygems verified the API endpoint hostname retrieved through a DNS SRV record. A man-in-the-middle attacker could use this flaw to force a client to download content from an untrusted domain. All rh-ruby22-ruby users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. All running instances of Ruby need to be restarted for this update to take effect.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

Attack Vector

Adjacent

Attack Complexity

Medium

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2015-05-12 CVE Reserved
2015-06-24 CVE Published
2024-08-06 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-254: 7PK - Security Features
CWE-345: Insufficient Verification of Data Authenticity

CAPEC

References (13)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2015/06/26/2	Mailing List
http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html	Third Party Advisory
http://www.securityfocus.com/bid/75482	Vdb Entry
https://puppet.com/security/cve/CVE-2015-3900	X_refsource_confirm
https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-007/?fid=6356	Third Party Advisory
https://www.trustwave.com/Resources/SpiderLabs-Blog/Attacking-Ruby-Gem-Security-with-CVE-2015-3900	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
http://blog.rubygems.org/2015/05/14/CVE-2015-3900.html	2019-04-22

URL	Date	SRC
http://lists.fedoraproject.org/pipermail/package-announce/2015-August/163502.html	2019-04-22
http://lists.fedoraproject.org/pipermail/package-announce/2015-August/163600.html	2019-04-22
http://lists.fedoraproject.org/pipermail/package-announce/2015-August/164236.html	2019-04-22
http://rhn.redhat.com/errata/RHSA-2015-1657.html	2019-04-22
https://access.redhat.com/security/cve/CVE-2015-3900	2015-08-24
https://bugzilla.redhat.com/show_bug.cgi?id=1236116	2015-08-24

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"				1.9 Search vendor "Ruby-lang" for product "Ruby" and version "1.9"		-		Affected
Ruby-lang Search vendor "Ruby-lang"		Ruby Search vendor "Ruby-lang" for product "Ruby"				1.9.1 Search vendor "Ruby-lang" for product "Ruby" and version "1.9.1"		-		Affected
Ruby-lang Search vendor "Ruby-lang"		Ruby Search vendor "Ruby-lang" for product "Ruby"				1.9.2 Search vendor "Ruby-lang" for product "Ruby" and version "1.9.2"		-		Affected
Ruby-lang Search vendor "Ruby-lang"		Ruby Search vendor "Ruby-lang" for product "Ruby"				1.9.3 Search vendor "Ruby-lang" for product "Ruby" and version "1.9.3"		-		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"				2.1 Search vendor "Ruby-lang" for product "Ruby" and version "2.1"		-		Affected
Ruby-lang Search vendor "Ruby-lang"		Ruby Search vendor "Ruby-lang" for product "Ruby"				2.1.1 Search vendor "Ruby-lang" for product "Ruby" and version "2.1.1"		-		Affected
Ruby-lang Search vendor "Ruby-lang"		Ruby Search vendor "Ruby-lang" for product "Ruby"				2.1.2 Search vendor "Ruby-lang" for product "Ruby" and version "2.1.2"		-		Affected
Ruby-lang Search vendor "Ruby-lang"		Ruby Search vendor "Ruby-lang" for product "Ruby"				2.1.3 Search vendor "Ruby-lang" for product "Ruby" and version "2.1.3"		-		Affected
Ruby-lang Search vendor "Ruby-lang"		Ruby Search vendor "Ruby-lang" for product "Ruby"				2.1.4 Search vendor "Ruby-lang" for product "Ruby" and version "2.1.4"		-		Affected
Ruby-lang Search vendor "Ruby-lang"		Ruby Search vendor "Ruby-lang" for product "Ruby"				2.1.5 Search vendor "Ruby-lang" for product "Ruby" and version "2.1.5"		-		Affected
Ruby-lang Search vendor "Ruby-lang"		Ruby Search vendor "Ruby-lang" for product "Ruby"				2.2.0 Search vendor "Ruby-lang" for product "Ruby" and version "2.2.0"		-		Affected
Rubygems Search vendor "Rubygems"		Rubygems Search vendor "Rubygems" for product "Rubygems"				2.0.0 Search vendor "Rubygems" for product "Rubygems" and version "2.0.0"		-		Affected
Rubygems Search vendor "Rubygems"		Rubygems Search vendor "Rubygems" for product "Rubygems"				2.0.1 Search vendor "Rubygems" for product "Rubygems" and version "2.0.1"		-		Affected
Rubygems Search vendor "Rubygems"		Rubygems Search vendor "Rubygems" for product "Rubygems"				2.0.2 Search vendor "Rubygems" for product "Rubygems" and version "2.0.2"		-		Affected
Rubygems Search vendor "Rubygems"		Rubygems Search vendor "Rubygems" for product "Rubygems"				2.0.3 Search vendor "Rubygems" for product "Rubygems" and version "2.0.3"		-		Affected
Rubygems Search vendor "Rubygems"		Rubygems Search vendor "Rubygems" for product "Rubygems"				2.0.4 Search vendor "Rubygems" for product "Rubygems" and version "2.0.4"		-		Affected
Rubygems Search vendor "Rubygems"		Rubygems Search vendor "Rubygems" for product "Rubygems"				2.0.5 Search vendor "Rubygems" for product "Rubygems" and version "2.0.5"		-		Affected
Rubygems Search vendor "Rubygems"		Rubygems Search vendor "Rubygems" for product "Rubygems"				2.0.6 Search vendor "Rubygems" for product "Rubygems" and version "2.0.6"		-		Affected
Rubygems Search vendor "Rubygems"		Rubygems Search vendor "Rubygems" for product "Rubygems"				2.0.7 Search vendor "Rubygems" for product "Rubygems" and version "2.0.7"		-		Affected
Rubygems Search vendor "Rubygems"		Rubygems Search vendor "Rubygems" for product "Rubygems"				2.0.8 Search vendor "Rubygems" for product "Rubygems" and version "2.0.8"		-		Affected
Rubygems Search vendor "Rubygems"		Rubygems Search vendor "Rubygems" for product "Rubygems"				2.0.9 Search vendor "Rubygems" for product "Rubygems" and version "2.0.9"		-		Affected
Rubygems Search vendor "Rubygems"		Rubygems Search vendor "Rubygems" for product "Rubygems"				2.0.10 Search vendor "Rubygems" for product "Rubygems" and version "2.0.10"		-		Affected
Rubygems Search vendor "Rubygems"		Rubygems Search vendor "Rubygems" for product "Rubygems"				2.0.11 Search vendor "Rubygems" for product "Rubygems" and version "2.0.11"		-		Affected
Rubygems Search vendor "Rubygems"		Rubygems Search vendor "Rubygems" for product "Rubygems"				2.0.12 Search vendor "Rubygems" for product "Rubygems" and version "2.0.12"		-		Affected
Rubygems Search vendor "Rubygems"		Rubygems Search vendor "Rubygems" for product "Rubygems"				2.0.13 Search vendor "Rubygems" for product "Rubygems" and version "2.0.13"		-		Affected
Rubygems Search vendor "Rubygems"		Rubygems Search vendor "Rubygems" for product "Rubygems"				2.0.14 Search vendor "Rubygems" for product "Rubygems" and version "2.0.14"		-		Affected
Rubygems Search vendor "Rubygems"		Rubygems Search vendor "Rubygems" for product "Rubygems"				2.0.15 Search vendor "Rubygems" for product "Rubygems" and version "2.0.15"		-		Affected
Rubygems Search vendor "Rubygems"		Rubygems Search vendor "Rubygems" for product "Rubygems"				2.2.0 Search vendor "Rubygems" for product "Rubygems" and version "2.2.0"		-		Affected
Rubygems Search vendor "Rubygems"		Rubygems Search vendor "Rubygems" for product "Rubygems"				2.2.1 Search vendor "Rubygems" for product "Rubygems" and version "2.2.1"		-		Affected
Rubygems Search vendor "Rubygems"		Rubygems Search vendor "Rubygems" for product "Rubygems"				2.2.2 Search vendor "Rubygems" for product "Rubygems" and version "2.2.2"		-		Affected
Rubygems Search vendor "Rubygems"		Rubygems Search vendor "Rubygems" for product "Rubygems"				2.2.3 Search vendor "Rubygems" for product "Rubygems" and version "2.2.3"		-		Affected
Rubygems Search vendor "Rubygems"		Rubygems Search vendor "Rubygems" for product "Rubygems"				2.4.0 Search vendor "Rubygems" for product "Rubygems" and version "2.4.0"		-		Affected
Rubygems Search vendor "Rubygems"		Rubygems Search vendor "Rubygems" for product "Rubygems"				2.4.1 Search vendor "Rubygems" for product "Rubygems" and version "2.4.1"		-		Affected
Rubygems Search vendor "Rubygems"		Rubygems Search vendor "Rubygems" for product "Rubygems"				2.4.2 Search vendor "Rubygems" for product "Rubygems" and version "2.4.2"		-		Affected
Rubygems Search vendor "Rubygems"		Rubygems Search vendor "Rubygems" for product "Rubygems"				2.4.3 Search vendor "Rubygems" for product "Rubygems" and version "2.4.3"		-		Affected
Rubygems Search vendor "Rubygems"		Rubygems Search vendor "Rubygems" for product "Rubygems"				2.4.4 Search vendor "Rubygems" for product "Rubygems" and version "2.4.4"		-		Affected
Rubygems Search vendor "Rubygems"		Rubygems Search vendor "Rubygems" for product "Rubygems"				2.4.5 Search vendor "Rubygems" for product "Rubygems" and version "2.4.5"		-		Affected
Rubygems Search vendor "Rubygems"		Rubygems Search vendor "Rubygems" for product "Rubygems"				2.4.6 Search vendor "Rubygems" for product "Rubygems" and version "2.4.6"		-		Affected
Oracle Search vendor "Oracle"		Solaris Search vendor "Oracle" for product "Solaris"				11.3 Search vendor "Oracle" for product "Solaris" and version "11.3"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				6.0 Search vendor "Redhat" for product "Enterprise Linux" and version "6.0"		-		Affected
Redhat Search vendor "Redhat"		Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux"				7.0 Search vendor "Redhat" for product "Enterprise Linux" and version "7.0"		-		Affected