Vulnerability Monitor

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CVE-2015-4020

RubyGems 2.0.x before 2.0.17, 2.2.x before 2.2.5, and 2.4.x before 2.4.8 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 with a domain that is suffixed with the original domain name, aka a "DNS hijack attack." NOTE: this vulnerability exists because to an incomplete fix for CVE-2015-3900.

Published

2015-08-25T17:59:01.760

Last Modified

2025-04-12T10:46:40.837

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 4.3 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:P/A:N

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

8.6

Impact Score

2.9

Weaknesses

Type: Primary
CWE-20

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	oracle	solaris	11.3	Yes
Application	rubygems	rubygems	2.0.0	Yes
Application	rubygems	rubygems	2.0.0	Yes
Application	rubygems	rubygems	2.0.0	Yes
Application	rubygems	rubygems	2.0.0	Yes
Application	rubygems	rubygems	2.0.0	Yes
Application	rubygems	rubygems	2.0.0	Yes
Application	rubygems	rubygems	2.0.1	Yes
Application	rubygems	rubygems	2.0.2	Yes
Application	rubygems	rubygems	2.0.3	Yes
Application	rubygems	rubygems	2.0.4	Yes
Application	rubygems	rubygems	2.0.5	Yes
Application	rubygems	rubygems	2.0.6	Yes
Application	rubygems	rubygems	2.0.7	Yes
Application	rubygems	rubygems	2.0.8	Yes
Application	rubygems	rubygems	2.0.9	Yes
Application	rubygems	rubygems	2.0.10	Yes
Application	rubygems	rubygems	2.0.11	Yes
Application	rubygems	rubygems	2.0.12	Yes
Application	rubygems	rubygems	2.0.13	Yes
Application	rubygems	rubygems	2.0.14	Yes
Application	rubygems	rubygems	2.0.15	Yes
Application	rubygems	rubygems	2.0.16	Yes
Application	rubygems	rubygems	2.2.0	Yes
Application	rubygems	rubygems	2.2.1	Yes
Application	rubygems	rubygems	2.2.2	Yes
Application	rubygems	rubygems	2.2.3	Yes
Application	rubygems	rubygems	2.2.4	Yes
Application	rubygems	rubygems	2.4.0	Yes
Application	rubygems	rubygems	2.4.1	Yes
Application	rubygems	rubygems	2.4.2	Yes
Application	rubygems	rubygems	2.4.3	Yes
Application	rubygems	rubygems	2.4.4	Yes
Application	rubygems	rubygems	2.4.5	Yes
Application	rubygems	rubygems	2.4.6	Yes
Application	rubygems	rubygems	2.4.7	Yes

References

http://blog.rubygems.org/2015/06/08/2.2.5-released.html Vendor Advisory ([email protected])
http://blog.rubygems.org/2015/06/08/2.4.8-released.html Vendor Advisory ([email protected])
http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html Third Party Advisory ([email protected])
http://www.securityfocus.com/bid/75431 ([email protected])
https://github.com/rubygems/rubygems/commit/5c7bfb5 ([email protected])
https://puppet.com/security/cve/CVE-2015-3900 ([email protected])
https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-009/?fid=6478 Third Party Advisory ([email protected])
https://www.trustwave.com/Resources/SpiderLabs-Blog/Attacking-Ruby-Gem-Security-with-CVE-2015-3900/ Third Party Advisory ([email protected])
http://blog.rubygems.org/2015/06/08/2.2.5-released.html Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://blog.rubygems.org/2015/06/08/2.4.8-released.html Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/75431 (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/rubygems/rubygems/commit/5c7bfb5 (af854a3a-2127-422b-91ae-364da2661108)
https://puppet.com/security/cve/CVE-2015-3900 (af854a3a-2127-422b-91ae-364da2661108)
https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-009/?fid=6478 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.trustwave.com/Resources/SpiderLabs-Blog/Attacking-Ruby-Gem-Security-with-CVE-2015-3900/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)