Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS01Y3FtLWNyeG0tNnFwds0bSA

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.

Permalink: https://github.com/advisories/GHSA-5cqm-crxm-6qpv
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS01Y3FtLWNyeG0tNnFwds0bSA
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Critical
Classification: General
Published: over 2 years ago
Updated: 3 months ago

CVSS Score: 9.8
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Identifiers: GHSA-5cqm-crxm-6qpv, CVE-2021-41816
References:

• https://nvd.nist.gov/vuln/detail/CVE-2021-41816
• https://groups.google.com/g/ruby-security-ann/c/4MQ568ZG47c
• https://hackerone.com/reports/1328463
• https://security-tracker.debian.org/tracker/CVE-2021-41816
• https://www.ruby-lang.org/en/news/2021/11/24/buffer-overrun-in-cgi-escape_html-cve-2021-41816/
• https://security.netapp.com/advisory/ntap-20220303-0006/
• https://lists.fedoraproject.org/archives/list/[email protected]/message/IUXQCH6FRKANCVZO2Q7D2SQX33FP3KWN/
• https://lists.fedoraproject.org/archives/list/[email protected]/message/UTOJGS5IEFDK3UOO7IY4OTTFGHGLSWZF/
• https://github.com/rubysec/ruby-advisory-db/blob/master/gems/cgi/CVE-2021-41816.yml
• 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://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.gentoo.org/glsa/202401-27
• https://github.com/advisories/GHSA-5cqm-crxm-6qpv

Repository: https://github.com/ruby/cgi
Blast Radius: 26.4

Affected Packages