MEDIUM
CVE-2015-3900
CWE-254Published: June 24, 2015· Updated: Jun 17, 2026
5.0
CVSS v3.1
Official 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."
Technical Analysis
CVE-2015-3900 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityNone
IntegrityP
AvailabilityNone
AV:N/AC:L/Au:N/C:N/I:P/A:N
Affected Vendors & Products
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (22)
→
http://blog.rubygems.org/2015/05/14/CVE-2015-3900.htmlPatch · Vendor Advisory
→
http://rhn.redhat.com/errata/RHSA-2015-1657.htmlThird Party Advisory
→
http://www.openwall.com/lists/oss-security/2015/06/26/2Third Party Advisory
→
http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.htmlThird Party Advisory
→
→
→
http://blog.rubygems.org/2015/05/14/CVE-2015-3900.htmlPatch · Vendor Advisory
Quick Facts
CVE IDCVE-2015-3900
CVSS Score5.0 / 10
SeverityMEDIUM
WeaknessCWE-254
CISA KEVNo
Affected4 vendor(s)
PublishedJun 24, 2015
Related CVEs (CWE-254)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2015-3900 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.