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CVE-2017-11173 — Missing Regex anchor in rack-cors — CVE Details

HIGH

Missing Regex anchor in Rack-Cors allows malicious third party site to perform CORS request

Published July 31, 2018Updated December 3, 2024Source: osv

Summary

Missing anchor in generated regex for rack-cors before 0.4.1 allows a malicious third-party site to perform CORS requests. If the configuration were intended to allow only the trusted `example.com` domain name and not the malicious `example.net` domain name, then `example.com.example.net` (as well as `example.com-example.net`) would be inadvertently allowed.

Advisory Timeline

  • First published July 31, 2018 (2995 days ago).
  • Last revised December 3, 2024 — 2316 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Bundler
Update rack-cors to 0.4.1 or later
gem install rack-cors -v 0.4.1

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: rubygems (1).

PackageEcosystemAffectedFixed In
rack-cors
rubygems
0.1.0, 0.1.1, 0.2.0, 0.2.2 (+9 more)0.4.1

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 8.8 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

Frequently Asked Questions

What is CVE-2017-11173?
Missing Regex anchor in Rack-Cors allows malicious third party site to perform CORS request This vulnerability has been assigned a severity rating of HIGH (CVSS score: 8.8/10).
How do I check if my project is affected by CVE-2017-11173?
CVE-2017-11173 affects rack-cors. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2017-11173 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
8.8

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-2j9c-9vmv-7m39

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