CVE-2021-41816: Integer Overflow or Wraparound

February 6, 2022 (updated January 24, 2024)

CGI.escape_html in Ruby has an integer overflow and resultant buffer overflow via a long string on platforms (such as Windows) where size_t and long have different numbers of bytes.

References

github.com/advisories/GHSA-5cqm-crxm-6qpv
groups.google.com/g/ruby-security-ann/c/4MQ568ZG47c
hackerone.com/reports/1328463
nvd.nist.gov/vuln/detail/CVE-2021-41816
security-tracker.debian.org/tracker/CVE-2021-41816
www.ruby-lang.org/en/news/2021/11/24/buffer-overrun-in-cgi-escape_html-cve-2021-41816/

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