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  5. CVE-2021-33621

CVE-2021-33621: Interpretation Conflict

November 18, 2022 (updated January 24, 2024)

The cgi gem before 0.1.0.2, 0.2.x before 0.2.2, and 0.3.x before 0.3.5 for Ruby allows HTTP response splitting. This is relevant to applications that use untrusted user input either to generate an HTTP response or to create a CGI::Cookie object.

References

  • nvd.nist.gov/vuln/detail/CVE-2021-33621
  • www.ruby-lang.org/en/news/2022/11/22/http-response-splitting-in-cgi-cve-2021-33621/

Code Behaviors & Features

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Affected versions

All versions before 0.1.0.2, all versions starting from 0.2.0 before 0.2.2, all versions starting from 0.3.0 before 0.3.5

Fixed versions

  • 0.1.0.2
  • 0.2.2
  • 0.3.5

Solution

Upgrade to versions 0.1.0.2, 0.2.2, 0.3.5 or above.

Impact 8.8 HIGH

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

Learn more about CVSS

Weakness

  • CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

Source file

gem/cgi/CVE-2021-33621.yml

Spotted a mistake? Edit the file on GitLab.

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