Buffer overrun in CGI.escape_html
A buffer overrun vulnerability was discovered in CGI.escape_html. This can lead to a buffer overflow when a user passes a very large string (> 700 MB) to CGI.escape_html on a platform where long type takes 4 bytes, typically, Windows.
02 / AFFECTED SOFTWARE
Affected packages
3 explicit affected versions
3 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
CGI.escape_html in Ruby before 2.7.5 and 3.x before 3.0.3 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. This also affects the CGI gem before 0.3.1 for Ruby.
A buffer overrun vulnerability was discovered in CGI.escape_html. This can lead to a buffer overflow when a user passes a very large string (> 700 MB) to CGI.escape_html on a platform where long type takes 4 bytes, typically, Windows.
05 / REFERENCES
Further evidence
- https://hackerone.com/reports/1328463
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IUXQCH6FRKANCVZO2Q7D2SQX33FP3KWN/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UTOJGS5IEFDK3UOO7IY4OTTFGHGLSWZF/
- https://security-tracker.debian.org/tracker/CVE-2021-41816
- https://security.gentoo.org/glsa/202401-27
- https://security.netapp.com/advisory/ntap-20220303-0006/
- https://www.ruby-lang.org/en/news/2021/11/24/buffer-overrun-in-cgi-escape_html-cve-2021-41816/
- https://github.com/ruby/cgi
- https://github.com/ruby/cgi/commit/959ccf0b6a672bcc64aeaa60c6e1f9e728f1e87f
- https://github.com/ruby/cgi/commit/ad079c1cb5f58eba1ffac46da79995fcf94a3a6e
- https://github.com/ruby/cgi/commit/c6a37a671b556eb06140ea89cc465136b24207a6
- https://github.com/ruby/cgi/commit/c728632c1c09d46cfd4ecbff9caaa3651dd1002a
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/cgi/CVE-2021-41816.yml
- https://groups.google.com/g/ruby-security-ann/c/4MQ568ZG47c
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IUXQCH6FRKANCVZO2Q7D2SQX33FP3KWN
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UTOJGS5IEFDK3UOO7IY4OTTFGHGLSWZF
- https://lists.fedoraproject.org/archives/list/[email protected]/message/IUXQCH6FRKANCVZO2Q7D2SQX33FP3KWN
- https://lists.fedoraproject.org/archives/list/[email protected]/message/UTOJGS5IEFDK3UOO7IY4OTTFGHGLSWZF
- https://nvd.nist.gov/vuln/detail/CVE-2021-41816
- https://security.netapp.com/advisory/ntap-20220303-0006
- https://www.ruby-lang.org/en/news/2021/11/24/buffer-overrun-in-cgi-escape_html-cve-2021-41816