CVE-2021-33621
medium
CVSS v3
—
VIR risk
5.5
Description
Moderate: ruby security update
Predictions
Exploit likelihood
30%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No vendor mitigations ingested yet for this CVE. The mitigation-content worker queues fetches as references arrive — check back in a few minutes, or see the references list below.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| rhel | 9 | fixed | |
| rocky | 8 | fixed | |
| sles | affected | | |
| rocky | 9 | fixed | |
| debian | bullseye | fixed | 2.7.4-1+deb11u2 |
| debian | bookworm | fixed | 3.1.2-4 |
| almalinux | 9 | fixed | rubygem-irb-1.4.1-143.module_el9.3.0+60+5ebc989a.noarch.rpm |
References
- https://www.ruby-lang.org/en/news/2022/11/22/http-response-splitting-in-cgi-cve-2021-33621/
- https://access.redhat.com/errata/RHSA-2024:1576
- https://access.redhat.com/errata/RHSA-2024:3838
- https://errata.rockylinux.org/RLSA-2024:1431
- https://errata.rockylinux.org/RLSA-2023:3821
- https://www.suse.com/security/cve/CVE-2021-33621.html
- https://errata.rockylinux.org/RLSA-2024:1576
- https://nvd.nist.gov/vuln/detail/CVE-2021-33621
- https://hackerone.com/reports/1204695
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/cgi/CVE-2021-33621.yml
- https://lists.debian.org/debian-lts-announce/2023/06/msg00012.html
- https://lists.debian.org/debian-lts-announce/2024/09/msg00000.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DQR7LWED6VAPD5ATYOBZIGJQPCUBRJBX
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/THVTYHHEOVLQFCFHWURZYO7PVUPBHRZD
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YACE6ORF2QBXXBK2V2CM36D7TZMEJVAS
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DQR7LWED6VAPD5ATYOBZIGJQPCUBRJBX
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/THVTYHHEOVLQFCFHWURZYO7PVUPBHRZD
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YACE6ORF2QBXXBK2V2CM36D7TZMEJVAS
- https://security.gentoo.org/glsa/202401-27
- https://security.netapp.com/advisory/ntap-20221228-0004
- https://www.ruby-lang.org/en/news/2022/11/22/http-response-splitting-in-cgi-cve-2021-33621
- https://security-tracker.debian.org/tracker/CVE-2021-33621
- https://access.redhat.com/errata/RHSA-2023:3821
- https://bugzilla.redhat.com/2149706
- https://bugzilla.redhat.com/2184059
💬 Discuss CVE-2021-33621 on VIR Community →
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.