What is the CVSS score of CVE-2015-3900?

CVE-2015-3900 has a CVSS 2.0 base score of 5.0 (Medium). CVSS vector: AV:N/AC:L/Au:N/C:N/I:P/A:N. EPSS exploitation probability: 2.4%.

Is there a patch available for CVE-2015-3900?

Yes, a patch is available for CVE-2015-3900. Update the affected software to the latest version immediately.

Rubygems CVE-2015-3900

MEDIUM

7PK - Security Features (CWE-254)

2015-06-24 cve@mitre.org

Information Disclosure Ruby Oracle Red Hat Enterprise Linux Solaris Rubygems Ruby Lang

5.0

CVSS 2.0 · NVD

View

Vulnerability Assessment

Weakness	CWE CWE-254
Impact	CVSS score of 5.0 (MEDIUM). Attack characteristics: network attack vector, low complexity. EPSS exploitation probability: 2.40%.
Exploit ScenarioDerived	This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the medium-severity affected system.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).

Patch available 2.4% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAI

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. Rated medium severity (CVSS 5.0), this vulnerability is remotely exploitable, low attack complexity.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affected Packages

rubygems rubygems-update fix: 2.0.16, 2.2.4, 2.4.7

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in rubygems

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified under CWE-254. 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 products include: Ruby-Lang Ruby, Rubygems, Oracle Solaris, Redhat Enterprise Linux. Version information: before 2.0.16.

Know when Rubygems gets its next vulnerability

Watch products and get an email when something new is published
Check this CVE against your own stack and servers
Exploit and PoC references, threat intelligence from 22 sources

Continue with Google Continue with GitHub

No credit card · 7-day full trial

Severity by source

NVD PRIMARY 5.0 MEDIUM

AV:N/AC:L/Au:N/C:N/I:P/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Confidentiality

None

Integrity

Availability

None

DescriptionCVE.org

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."

Threat Intelligence Overview

EPSS Score

2.4%

Top 15% exploitable

Data Quality

3 sources

Confidence: Low

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity MEDIUM

CISA KEV No

Public POC No

EPSS 2.4%

Patch available Yes

Active threat No

Deciding rule

MEDIUM severity (CVSS 4.0-6.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +2

CVSS: +25

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Affected Products (CPE)CVE.org

cpe:2.3:a:ruby-lang:ruby:1.9:*:*:*:*:*:*:*

cpe:2.3:a:ruby-lang:ruby:1.9.1:*:*:*:*:*:*:*

cpe:2.3:a:ruby-lang:ruby:1.9.2:*:*:*:*:*:*:*

cpe:2.3:a:ruby-lang:ruby:1.9.3:*:*:*:*:*:*:*

cpe:2.3:a:ruby-lang:ruby:2.0.0:*:*:*:*:*:*:*

cpe:2.3:a:ruby-lang:ruby:2.1:-:*:*:*:*:*:*

cpe:2.3:a:ruby-lang:ruby:2.1.1:*:*:*:*:*:*:*

cpe:2.3:a:ruby-lang:ruby:2.1.2:*:*:*:*:*:*:*

cpe:2.3:a:ruby-lang:ruby:2.1.3:*:*:*:*:*:*:*

cpe:2.3:a:ruby-lang:ruby:2.1.4:*:*:*:*:*:*:*

cpe:2.3:a:ruby-lang:ruby:2.1.5:*:*:*:*:*:*:*

cpe:2.3:a:ruby-lang:ruby:2.2.0:*:*:*:*:*:*:*

cpe:2.3:a:rubygems:rubygems:2.0.0:*:*:*:*:*:*:*

cpe:2.3:a:rubygems:rubygems:2.0.1:*:*:*:*:*:*:*

cpe:2.3:a:rubygems:rubygems:2.0.2:*:*:*:*:*:*:*

cpe:2.3:a:rubygems:rubygems:2.0.3:*:*:*:*:*:*:*

cpe:2.3:a:rubygems:rubygems:2.0.4:*:*:*:*:*:*:*

cpe:2.3:a:rubygems:rubygems:2.0.5:*:*:*:*:*:*:*

cpe:2.3:a:rubygems:rubygems:2.0.6:*:*:*:*:*:*:*

cpe:2.3:a:rubygems:rubygems:2.0.7:*:*:*:*:*:*:*

+ 22 more

More in Rubygems

View all

CVE-2017-0899 CRITICAL Act Now POC

9.8 Aug 31

RubyGems version 2.6.12 and earlier is vulnerable to maliciously crafted gem specifications that include terminal escape

CVE-2017-0901 HIGH Act Now POC

7.5 Aug 31

RubyGems version 2.6.12 and earlier fails to validate specification names, allowing a maliciously crafted gem to potenti

CVE-2017-0900 HIGH Act Now POC

7.5 Aug 31

RubyGems version 2.6.12 and earlier is vulnerable to maliciously crafted gem specifications to cause a denial of service

CVE-2017-0902 HIGH This Week POC

8.1 Aug 31

RubyGems version 2.6.12 and earlier is vulnerable to a DNS hijacking vulnerability that allows a MITM attacker to force

CVE-2012-2140 HIGH This Week POC

7.5 Jul 18

The Mail gem before 2.4.3 for Ruby allows remote attackers to execute arbitrary commands via shell metacharacters in a (

CVE-2013-2615 HIGH This Week POC

7.5 Mar 20

lib/entry_controller.rb in the fastreader Gem 1.0.8 for Ruby allows remote attackers to execute arbitrary commands via s

CVE-2022-29218 HIGH This Week POC

7.5 May 13

RubyGems is a package registry used to supply software for the Ruby language ecosystem. Rated high severity (CVSS 7.5),

CVE-2019-8320 HIGH This Week POC

7.4 Jun 06

A Directory Traversal issue was discovered in RubyGems 2.7.6 and later through 3.0.2. Rated high severity (CVSS 7.4), th

CVE-2017-0903 CRITICAL Act Now

9.8 Oct 11

RubyGems versions between 2.0.0 and 2.6.13 are vulnerable to a possible remote code execution vulnerability. Rated criti

CVE-2013-0269 HIGH Act Now

7.5 Feb 13

The JSON gem before 1.5.5, 1.6.x before 1.6.8, and 1.7.x before 1.7.7 for Ruby allows remote attackers to cause a denial

CVE-2018-1000076 CRITICAL Act Now

9.8 Mar 13

RubyGems version Ruby 2.2 series: 2.2.9 and earlier, Ruby 2.3 series: 2.3.6 and earlier, Ruby 2.4 series: 2.4.3 and earl

CVE-2012-2139 MEDIUM This Month POC

5.0 Jul 18

Directory traversal vulnerability in lib/mail/network/delivery_methods/file_delivery.rb in the Mail gem before 2.4.4 for

Same weakness CWE-254 – 7PK - Security Features

View all

CVE-2015-1158 CRITICAL POC

10.0

CVE-2016-2296 CRITICAL POC

9.4

CVE-2016-2118 HIGH POC

7.5

CVE-2015-1793 MEDIUM POC

6.5

CVE-2015-3693 CRITICAL POC

9.3

CVE-2016-0128 MEDIUM

6.8

CVE-2016-10178 CRITICAL POC

9.8

CVE-2015-8286 CRITICAL POC

9.8

Same technique Information Disclosure

View all

CVE-2019-2725 CRITICAL POC

9.8

CVE-2021-34523 CRITICAL POC

9.0

CVE-2013-2251 CRITICAL POC

9.8

CVE-2017-5638 CRITICAL POC

9.8

CVE-2025-24813 CRITICAL POC

9.8

CVE-2025-68613 HIGH POC

8.8

CVE-2015-1701 HIGH POC

7.8

CVE-2017-0147 HIGH POC

7.5

References

Advisories & patches

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

Search Externally

GitHub PoC

Exploit-DB PacketStorm Snyk Rapid7 Nuclei Templates Trickest PoC

Back