Description
A Node.js application that allows an attacker to trigger a DNS request for a host of their choice could trigger a Denial of Service in versions < 15.2.1, < 14.15.1, and < 12.19.1 by getting the application to resolve a DNS record with a larger number of responses. This is fixed in 15.2.1, 14.15.1, and 12.19.1.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| NodeJS | Node | 4.0 – < 4.*, 5.0 – < 5.*, 6.0 – < 6.*, 7.0 – < 7.*, 8.0 – < 8.*, 9.0 – < 9.*, 11.0 – < 11.*, 12.0 – < 12.19.1, 13.0 – < 13.*, 14.0 – < 14.15.1, 15.0 – < 15.2.1 | 4.* |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | c-ares | 1.17.1-1 | — |
| Debian 13 | c-ares | 1.17.1-1 | — |
| Debian 12 | c-ares | 1.17.1-1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | nodejs +3 | 1:12.19.1-1.module+el8.3.0+8851+b7b41ca0 | RHSA-2021:0551, RHSA-2020:5499 |
| RHEL 8 | nodejs-nodemon | 1.18.3-1.module+el8.1.0+3369+37ae6a45 | RHSA-2021:0551, RHSA-2020:5499 |
| RHEL 8 | nodejs-packaging | 17-3.module+el8.1.0+3369+37ae6a45 | RHSA-2021:0551, RHSA-2020:5499 |
| RHEL 8 | npm | 1:6.14.8-1.12.19.1.1.module+el8.3.0+8851+b7b41ca0 | RHSA-2021:0551, RHSA-2020:5499 |
| RHEL 3 | rh-nodejs12-nodejs +2 | 12.19.1-2.el7 | RHSA-2020:5305 |
| RHEL 3 | rh-nodejs12-npm | 6.14.8-12.19.1.2.el7 | RHSA-2020:5305 |
| RHEL 3 | rh-nodejs14-nodejs +2 | 14.15.4-2.el7 | RHSA-2021:0421 |
| RHEL 3 | rh-nodejs14-npm | 6.14.10-14.15.4.2.el7 | RHSA-2021:0421 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | nodejs-nodemon | 1.18.3-1.module_el8.3.0+2023+d2377ea3 | ALSA-2021:0551, ALSA-2020:5499 |
| AlmaLinux 8 | nodejs-packaging | 17-3.module_el8.3.0+2023+d2377ea3 | ALSA-2021:0551, ALSA-2020:5499 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | nodejs-nodemon | 1.18.3-1.module+el8.3.0+101+f84c7154 | RLSA-2021:0551, RLSA-2020:5499 |
| Rocky Linux 8 | nodejs-packaging | 17-3.module+el8.3.0+101+f84c7154 | RLSA-2021:0551, RLSA-2020:5499 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP2 | c-ares | 1.17.0-3.8.1 | SUSE-SU-2020:3478-1 |
| SLES 15 SP2 | nodejs12 | 12.20.1-4.10.1 | SUSE-SU-2021:0062-1 |
| SLES 15 SP2 | nodejs14 | 14.15.4-5.6.1 | SUSE-SU-2021:0061-1 |
| SLES 15 SP1 | c-ares | 1.17.0-3.8.1 | SUSE-SU-2020:3478-1 |
| SLES 15 | c-ares | 1.17.0-3.8.1 | SUSE-SU-2020:3478-1 |
| SLES 12 | nodejs12 | 12.19.1-1.23.1 | SUSE-SU-2020:3549-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 | c-ares | 1.17.0-3.8.1 | SUSE-SU-2020:3478-1 |
| SLE HPC 15 | c-ares | 1.17.0-3.8.1 | SUSE-SU-2020:3478-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | c-ares | 1.17.2-2.2 | openSUSE-SU-2024:10668-1 |
| openSUSE Tumbleweed | nodejs14 | 14.17.5-1.2 | openSUSE-SU-2024:11096-1 |
| openSUSE Leap 15.2 | c-ares +1 | 1.17.0-lp152.2.3.1 | openSUSE-SU-2020:2092-1 |
| openSUSE Leap 15.2 | nodejs12 | 12.20.1-lp152.3.9.1 | openSUSE-SU-2021:0064-1 |
| openSUSE Leap 15.2 | nodejs14 | 14.15.4-lp152.5.1 | openSUSE-SU-2021:0066-1 |
| openSUSE Leap 15.1 | c-ares +1 | 1.17.0-lp151.3.6.1 | openSUSE-SU-2020:2045-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | nodejs | 14.15.1-r0 | — |
| Alpine v3.24 | nodejs-current | 15.3.0-r0 | — |
| Alpine v3.23 | nodejs | 14.15.1-r0 | — |
| Alpine v3.23 | nodejs-current | 15.3.0-r0 | — |
| Alpine v3.22 | nodejs | 14.15.1-r0 | — |
| Alpine v3.22 | nodejs-current | 15.3.0-r0 | — |
| Alpine v3.21 | nodejs | 14.15.1-r0 | — |
| Alpine v3.21 | nodejs-current | 15.3.0-r0 | — |
| Alpine v3.20 | nodejs | 14.15.1-r0 | — |
| Alpine v3.20 | nodejs-current | 15.3.0-r0 | — |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | nodejs | 14.15.1-r0 | — |
| Alpine v3.19 | nodejs-current | 15.3.0-r0 | — |
| Alpine v3.18 | nodejs | 14.15.1-r0 | — |
| Alpine v3.18 | nodejs-current | 15.3.0-r0 | — |
| Alpine v3.17 | nodejs | 14.15.1-r0 | — |
| Alpine v3.17 | nodejs-current | 15.3.0-r0 | — |
| Alpine v3.16 | nodejs | 14.15.1-r0 | — |
| Alpine v3.16 | nodejs-current | 15.3.0-r0 | — |
| Alpine v3.15 | nodejs | 14.15.1-r0 | — |
| Alpine v3.15 | nodejs-current | 15.3.0-r0 | — |
| Alpine v3.14 | nodejs | 14.15.1-r0 | — |
| Alpine v3.14 | nodejs-current | 15.3.0-r0 | — |
| Alpine v3.13 | nodejs | 14.15.1-r0 | — |
| Alpine v3.13 | nodejs-current | 15.3.0-r0 | — |
| Alpine v3.12 | nodejs | 12.20.1-r0 | — |
| Alpine v3.11 | nodejs | 12.20.1-r0 | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | python-gevent | 21.1.2-3 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | nodejs +3 | 1:12.19.1-1.module+el8.3.0+7884+668e4ef8 | ELSA-2021-0551, ELSA-2020-5499 |
| Oracle Linux 8 | nodejs-nodemon | 1.18.3-1.module+el8.1.0+5393+aaf413e3 | ELSA-2021-0551, ELSA-2020-5499 |
| Oracle Linux 8 | nodejs-packaging | 17-3.module+el8.1.0+5393+aaf413e3 | ELSA-2021-0551, ELSA-2020-5499 |
| Oracle Linux 8 | npm | 1:6.14.8-1.12.19.1.1.module+el8.3.0+7884+668e4ef8 | ELSA-2021-0551, ELSA-2020-5499 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 2 repositories
-
masahiro331/CVE-2020-8277 ★ 7 · Nov 18, 2020
-
AndrewIjano/CVE-2020-8277 ★ 0 · Jul 10, 2021
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 22
- ALSA-2020:5499 Moderate: nodejs:12 security and bug fix update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2021:0551 Moderate: nodejs:14 security and bug fix update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2021:0551 Red Hat Security Advisory: nodejs:14 security and bug fix update Red Hat Security Advisories (RHSA) · Oct 13, 2026
- RHSA-2021:0421 Red Hat Security Advisory: rh-nodejs14-nodejs security update Red Hat Security Advisories (RHSA) · Oct 13, 2026
- RHSA-2020:5499 Red Hat Security Advisory: nodejs:12 security and bug fix update Red Hat Security Advisories (RHSA) · Oct 13, 2026
- RHSA-2020:5305 Red Hat Security Advisory: rh-nodejs12-nodejs security update Red Hat Security Advisories (RHSA) · Oct 13, 2026
- WID-SEC-2026-3126 Node.js: Schwachstelle ermöglicht Denial of Service BSI CERT-Bund (WID) · Aug 31, 2026
- RLSA-2021:0551 Moderate: nodejs:14 security and bug fix update Rocky Linux Security Advisories · Feb 4, 2026
- RLSA-2020:5499 Moderate: nodejs:12 security and bug fix update Rocky Linux Security Advisories · Feb 4, 2026
- openSUSE-SU-2020:2045-1 Security update for c-ares SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:2092-1 Security update for c-ares SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3549-1 Security update for nodejs12 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10668-1 c-ares-devel-1.17.2-2.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:0061-1 Security update for nodejs14 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:0066-1 Security update for nodejs14 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11096-1 nodejs14-14.17.5-1.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3478-1 Security update for c-ares SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:0062-1 Security update for nodejs12 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:0064-1 Security update for nodejs12 SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2023-0065 Oracle MySQL: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 27, 2023
- ELSA-2021-0551 Moderate: nodejs:14 security and bug fix update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Feb 20, 2021
- ELSA-2020-5499 Moderate: nodejs:12 security and bug fix update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Dec 17, 2020
References
- https://hackerone.com/reports/1033107
- https://nodejs.org/en/blog/vulnerability/november-2020-security-releases/
- FEDORA-2020-7473744de1 vendor-advisory
- FEDORA-2020-307e873389 vendor-advisory
- GLSA-202012-11 vendor-advisory
- GLSA-202101-07 vendor-advisory
- https://www.oracle.com/security-alerts/cpujan2021.html
- FEDORA-2021-afed2b904e vendor-advisory
- FEDORA-2021-ee913722db vendor-advisory
- https://www.oracle.com/security-alerts/cpuApr2021.html
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://www.oracle.com/security-alerts/cpuapr2022.html