Vulnerability CVE-2015-3900
Published: 2015-06-24

Description:
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."

See advisories in our WLB2 database:
Topic
Author
Date
Med.
rubygems <2.4.8 vulnerable to DNS request hijacking
Reed Loden
26.06.2015

Type:

CWE-254

 (Security Features)

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None
Affected software
Rubygems -> Rubygems 
Ruby-lang -> RUBY 
Redhat -> Enterprise linux 
Oracle -> Solaris 

 References:
http://blog.rubygems.org/2015/05/14/CVE-2015-3900.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-August/163502.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-August/163600.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-August/164236.html
http://rhn.redhat.com/errata/RHSA-2015-1657.html
http://www.openwall.com/lists/oss-security/2015/06/26/2
http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html
http://www.securityfocus.com/bid/75482
https://puppet.com/security/cve/CVE-2015-3900
https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-007/?fid=6356
https://www.trustwave.com/Resources/SpiderLabs-Blog/Attacking-Ruby-Gem-Security-with-CVE-2015-3900/
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