CVE-2015-3900: n/a vulnerability

CVE-2015-3900: 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 whe...

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."

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 05:56 UTC (UTC+00:00)

Security readout for executives and security teams

Older RubyGems clients may trust a redirected gem or API endpoint without validating the hostname. An attacker able to influence DNS SRV responses could redirect RubyGems traffic to another domain, creating supply-chain risk for build, deployment, or developer systems using affected versions. Exposure is most likely on legacy Ruby development hosts, CI workers, build images, or servers with old OS-managed RubyGems packages. Modern environments are less likely exposed unless pinned to old RubyGems versions or unmaintained vendor packages. Prioritize remediation where RubyGems participates in production build or deployment pipelines. The issue is old, but it affects software supply-chain trust, so legacy systems should be found and upgraded rather than accepted silently. Mitigation focus: Upgrade RubyGems beyond the affected version ranges named in the CVE.; Apply vendor package updates for Red Hat, Fedora, Oracle, or Puppet-managed RubyGems deployments.; Remove or rebuild old CI images and developer base images containing vulnerable RubyGems..

Prepared: Jun 13, 2026, 22:22 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jun 24, 2015, 14:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

4Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://www.trustwave.com/Resources/SpiderLabs-Blog/Attacking-Ruby-Gem-Security-with-CVE-2015-3900/CVE reference · x_refsource_MISC
https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-007/?fid=6356CVE reference · x_refsource_MISC
https://puppet.com/security/cve/CVE-2015-3900CVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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