Vulnerability in Ruby-lang Cgi
CVE-2021-41819
CGI::Cookie.parse in Ruby through 2.6.8 mishandles security prefixes in cookie names. This also affects the CGI gem through 0.3.0 for Ruby.
EPSS: 0.029 (85.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Ruby-lang Cgi — versions 0.1.0, 0.2.0, 0.3.0
- Ruby-lang Ruby
- Debian Debian_linux — versions 9.0, 10.0, 11.0
- Fedoraproject Fedora — versions 34, 35
- Opensuse Factory
- Opensuse Leap — versions 15.2
- Redhat Enterprise_linux — versions 8.0
- Redhat Software_collections
- Suse Linux_enterprise — versions 11.0, 12.0, 15.0
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Permissions Required, Third Party Advisory)
- cve@mitre.org (Exploit, Vendor Advisory)
- cve@mitre.org (Third Party Advisory)
- cve@mitre.org (vendor-advisory)
- cve@mitre.org (vendor-advisory)
- cve@mitre.org (vendor-advisory)
Frequently asked questions
- What is CVE-2021-41819?
- CVE-2021-41819 is a high-severity vulnerability in Ruby-lang Cgi, classified under Reliance on Cookies without Validation and Integrity Checking. CVSS score: 7.5/10. Published 2022-01-01.
- How severe is CVE-2021-41819?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-41819 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.