CVE-2021-23017
high
CVSS v3
—
CVSS v4 NEW
—
VIR risk
9.0
Description
RHSA-2022:0323: nginx:1.20 security update (Important)
Predictions
Exploit likelihood
20%
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.
Exploits
Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.
Exploit-DB
Nginx 1.20.0 - Denial of Service (DOS)
Source code queued for fetch — refresh in a moment.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
AlmaLinux Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| 8 | Fixed | nginx-1.20.1-1.module_el8.6.0+2782+a022aca3.alma.aarch64.rpm |
Arch Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Fixed | 1.21.0-1 |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 1.18.0-6.1 |
| sid | Fixed | 1.18.0-6.1 |
| forky | Fixed | 1.18.0-6.1 |
| bullseye | Fixed | 1.18.0-6.1 |
| bookworm | Fixed | 1.18.0-6.1 |
Red Hat Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| 8 | Fixed | — |
Rocky Linux Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| 8 | Fixed | — |
References
- https://security.archlinux.org/ASA-202106-48
- https://security.archlinux.org/ASA-202106-36
- https://www.suse.com/security/cve/CVE-2021-23017.html
- https://errata.rockylinux.org/RLSA-2022:0323
- https://errata.rockylinux.org/RLSA-2021:2290
- https://errata.rockylinux.org/RLSA-2021:2259
- https://security-tracker.debian.org/tracker/CVE-2021-23017
- https://errata.almalinux.org/8/ALSA-2021-2290.html
- https://errata.almalinux.org/8/ALSA-2021-2259.html
- https://errata.almalinux.org/8/ALSA-2022-0323.html
- https://access.redhat.com/errata/RHSA-2021:2259
- https://access.redhat.com/errata/RHSA-2021:2290
- https://access.redhat.com/errata/RHSA-2022:0323
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.