Home/CVE/The URI.decode_www_form_component method in Ruby before 1.9.2-p330 allows remote attackers to cause a denial of service
CVE

CVE-2014-6438

The URI.decode_www_form_component method in Ruby before 1.9.2-p330 allows remote attackers to cause a denial of service

The URI.decode_www_form_component method in Ruby before 1.9.2-p330 allows remote attackers to cause a denial of service (catastrophic regular expression backtracking, resource consumption, or application crash) via a crafted string.

HIGH · CVSS 7.5 EPSS 0.01127
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules3 YARA rules0
▤

Affected Products & Versions

1
ruby-lang ruby<= 1.9.2
◈

Sigma Hunt Rules

3
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productmediumRuby on Rails Framework Exceptions
productmediumPotential Ruby Reverse Shell
productmediumRuby Inline Command Execution
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.0 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD06 Sep 2017 · 09:29 PM
CVSS VectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

3
rhsaRHSA-2026:7307Moderate
rhsaRHSA-2026:8838Moderate
rhsaRHSA-2026:7305Moderate
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.openwall.com/lists/oss-security/2015/07/13/6Mailing ListVDB Entry
http://www.securitytracker.com/id/1032874Third Party AdvisoryVDB Entry
https://github.com/ruby/www.ruby-lang.org/issues/817Third Party Advisory
https://www.ruby-lang.org/en/news/2014/08/19/ruby-1-9-2-p330-released/PatchRelease NotesVendor Advisory
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