CVE-2021-41819
medium
CVSS v3
—
CVSS v4 NEW
—
VIR risk
5.5
Description
RHSA-2022:6450: ruby:3.0 security, bug fix, and enhancement update (Moderate)
Predictions
Exploit likelihood
30%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 3.0.3-1 | |
| sles | affected | | |
| rocky | 8 | fixed | |
| debian | bullseye | fixed | 2.7.4-1+deb11u1 |
| almalinux | 8 | fixed | rubygem-io-console-0.4.7-108.module_el8.5.0+2623+08a8ba32.aarch64.rpm |
| rhel | 8 | fixed | |
References
- https://www.ruby-lang.org/en/news/2021/11/24/cookie-prefix-spoofing-in-cgi-cookie-parse-cve-2021-41819/
- https://www.suse.com/security/cve/CVE-2021-41819.html
- https://errata.rockylinux.org/RLSA-2022:6450
- https://errata.rockylinux.org/RLSA-2022:6447
- https://errata.rockylinux.org/RLSA-2022:5779
- https://errata.rockylinux.org/RLSA-2022:0543
- https://nvd.nist.gov/vuln/detail/CVE-2021-41819
- https://hackerone.com/reports/910552
- https://github.com/ruby/cgi
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/cgi/CVE-2021-41819.yml
- 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/package-announce@lists.fedoraproject.org/message/IUXQCH6FRKANCVZO2Q7D2SQX33FP3KWN
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UTOJGS5IEFDK3UOO7IY4OTTFGHGLSWZF
- https://security.gentoo.org/glsa/202401-27
- https://security.netapp.com/advisory/ntap-20220121-0003
- https://www.ruby-lang.org/en/news/2021/11/24/cookie-prefix-spoofing-in-cgi-cookie-parse-cve-2021-41819
- https://security-tracker.debian.org/tracker/CVE-2021-41819
- https://access.redhat.com/errata/RHSA-2022:5779
- https://bugzilla.redhat.com/2025104
- https://bugzilla.redhat.com/2026757
- https://errata.almalinux.org/8/ALSA-2022-5779.html
- https://access.redhat.com/errata/RHSA-2022:6447
- https://bugzilla.redhat.com/2075687
- https://errata.almalinux.org/8/ALSA-2022-6447.html
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.