01 Record

CVE-2015-4020

RubyGems 2.0.x before 2.0.17, 2.2.x before 2.2.5, and 2.4.x before 2.4.8 does not validate the hostname when fetching gems or making API requests, which allows remote attackers to redirect requests to

UnratedPUBLISHEDCNA: mitre

CNA base scoreUnratedNo CNA CVSS vector

View raw JSON

02 Description

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 3.46% probability of exploitation activity in the next 30 days.
EPSS percentile: Equal to or higher than the score of 89.0% of scored records. A rank, not a probability.
NVD base score: The NVD has published no score for this record
NVD CVSS vector: No NVD score to derive
NVD analysis status: Modified. NVD last modified this record on 2026-06-17.
Red Hat severity: Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2015-08-25 17:00Z11 YR AGO

Last updated

2024-08-06 06:04Z2 YR AGO

Reserved

2015-05-18

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

CWE-20Improper Input ValidationClass
CWE-346Origin Validation ErrorClass

Data version

5.1

Document digest

71ae24b51bf64509d3666ed0accd35338cdf5c98d4e806dddd360698611fb1b5

05 Affected products

VendorProductVersionsPlatforms

oraclesolarisNot specified—

redhatcloudforms_managementengineNot specified—

redhatenterprise_linuxNot specified—

redhatenterprise_mrgNot specified—

redhatopenshiftNot specified—

redhatopenstackNot specified—

redhatopenstack-installerNot specified—

redhatrhel_software_collectionsNot specified—

redhatsatelliteNot specified—

rhel_sam1Not specified—

rubygemsrubygemsNot specified—

06 References

blog.rubygems.orghttp://blog.rubygems.org/2015/06/08/2.2.5-released.htmlx_refsource_CONFIRM
www.trustwave.comhttps://www.trustwave.com/Resources/SpiderLabs-Blog/Attacking-Ruby-Gem-Security-with-CVE-2015-3900/x_refsource_MISC
www.securityfocus.com75431http://www.securityfocus.com/bid/75431vdb-entryx_refsource_BID
www.trustwave.comhttps://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-009/?fid=6478x_refsource_MISC
blog.rubygems.orghttp://blog.rubygems.org/2015/06/08/2.4.8-released.htmlx_refsource_CONFIRM
github.comhttps://github.com/rubygems/rubygems/commit/5c7bfb5x_refsource_CONFIRM
puppet.comhttps://puppet.com/security/cve/CVE-2015-3900x_refsource_CONFIRM
www.oracle.comhttp://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.htmlx_refsource_CONFIRM