CVE-2015-3900

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."

Category

5.0
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 1.65% Top 20%
Vendor Advisory redhat.com Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory fedoraproject.org Vendor Advisory rubygems.org
Affected: n/a n/a
Published at:
Updated at:

References

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

Frequently Asked Questions

What is the severity of CVE-2015-3900?
CVE-2015-3900 has been scored as a medium severity vulnerability.
How to fix CVE-2015-3900?
To fix CVE-2015-3900, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2015-3900 being actively exploited in the wild?
It is possible that CVE-2015-3900 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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