Security Features in Ruby - CVE-2015-3900
Published: June 24, 2015 / Updated: July 28, 2020
Vulnerability identifier: #VU32365
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2015-3900
CWE-ID: CWE-254
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to manipulate data.
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."
Affected software
Ruby
Amazon Linux AMI
Fedora
ruby (Alpine package)
rubygems
Amazon Linux AMI
Fedora
ruby (Alpine package)
rubygems
How to mitigate CVE-2015-3900
Install update from vendor's website.
Ruby - addressed in versions 2.2.4, 2.4.7
ruby (Alpine package) - update to 2.0.0_p647-r0
rubygems - addressed in versions 2.2.5-100.fc21, 2.4.8-100.fc22, 2.4.8-100.fc23
ruby (Alpine package) - update to 2.0.0_p647-r0
rubygems - addressed in versions 2.2.5-100.fc21, 2.4.8-100.fc22, 2.4.8-100.fc23
External 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/