CVE-2021-41816: Buffer overrun in CGI.escape_html

CVE-2021-41816 · Severity: low · CVSS 3.1 · Published 2021-12-14

Buffer overrun in CGI.escape_html

Technologies: cgi (RubyGems). Vendors: RubyGems.

Quick answers

Is CVE-2021-41816 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2021-41816 being exploited in the wild.
How severe is CVE-2021-41816?
Low severity, with a CVSS score of 3.1, published 14 December 2021.
Which products and versions are affected?
cgi (RubyGems) ECOSYSTEM:introduced=0.3.0,fixed=0.3.1.
Is there a fix for CVE-2021-41816?
Yes. cgi (RubyGems): upgrade to 0.3.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2021-41816?
Check whether you run cgi (RubyGems) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • cgi (RubyGems): upgrade to 0.3.1 or later
    bundle update cgi

Affected products

  • cgi (RubyGems) ECOSYSTEM:introduced=0.3.0,fixed=0.3.1

Identifiers

  • CVE-2021-41816
  • GHSA-5cqm-crxm-6qpv

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