Description
A flaw was found in c-ares library, where a missing input validation check of host names returned by DNS (Domain Name Servers) can lead to output of wrong hostnames which might potentially lead to Domain Hijacking. The highest threat from this vulnerability is to confidentiality and integrity as well as system availability.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | c-ares | c-ares 1.17.2 | — |
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 | 1.17.1-1.1 | — |
| Debian 13 | c-ares | 1.17.1-1.1 | — |
| Debian 12 | c-ares | 1.17.1-1.1 | — |
| Debian 10 | c-ares | 1.14.0-1+deb10u1 | DSA-4954-1 |
| Debian 9 | c-ares | 1.12.0-1+deb9u2 | DLA-2738-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | c-ares | 1.17.1-1ubuntu1 | — |
| Ubuntu 20.04 LTS | c-ares | 1.15.0-1ubuntu0.1 | USN-5034-1 |
| Ubuntu 18.04 LTS | c-ares | 1.14.0-1ubuntu0.1 | USN-5034-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | c-ares | 1.10.0-3ubuntu0.2+esm1 | USN-5034-2 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | c-ares +1 | 1.13.0-6.el8 | RHSA-2022:2043 |
| RHEL 8 | nodejs +3 | 1:12.22.5-1.module+el8.4.0+12242+af52a4c7 | RHSA-2021:3666, RHSA-2021:3623 |
| RHEL 8 | nodejs-nodemon | 2.0.3-1.module+el8.3.0+6519+9f98ed83 | RHSA-2021:3666, RHSA-2021:3623 |
| RHEL 8 | nodejs-packaging | 17-3.module+el8.1.0+3369+37ae6a45 | RHSA-2021:3666, RHSA-2021:3623 |
| RHEL 8 | npm | 1:6.14.14-1.12.22.5.1.module+el8.4.0+12242+af52a4c7 | RHSA-2021:3666, RHSA-2021:3623 |
| RHEL 3 | rh-nodejs12-nodejs +2 | 12.22.5-1.el7 | RHSA-2021:3281 |
| RHEL 3 | rh-nodejs12-nodejs-nodemon +1 | 2.0.3-5.el7 | RHSA-2021:3281, RHSA-2021:3280 |
| RHEL 3 | rh-nodejs12-npm | 6.14.14-12.22.5.1.el7 | RHSA-2021:3281 |
| RHEL 3 | rh-nodejs14-nodejs +2 | 14.17.5-1.el7 | RHSA-2021:3280 |
| RHEL 3 | rh-nodejs14-npm | 6.14.14-14.17.5.1.el7 | RHSA-2021:3280 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8.2 EUS | nodejs +3 | 1:12.22.5-1.module+el8.2.0+12241+a3db445b | RHSA-2021:3638 |
| RHEL 8.2 EUS | nodejs-nodemon | 1.18.3-1.module+el8.1.0+3369+37ae6a45 | RHSA-2021:3638 |
| RHEL 8.2 EUS | nodejs-packaging | 17-3.module+el8.1.0+3369+37ae6a45 | RHSA-2021:3638 |
| RHEL 8.2 EUS | npm | 1:6.14.14-1.12.22.5.1.module+el8.2.0+12241+a3db445b | RHSA-2021:3638 |
| RHEL 8.1 EUS | nodejs +3 | 1:12.22.5-1.module+el8.1.0+12238+63fe3aec | RHSA-2021:3639 |
| RHEL 8.1 EUS | nodejs-nodemon | 1.18.3-1.module+el8.1.0+3369+37ae6a45 | RHSA-2021:3639 |
| RHEL 8.1 EUS | nodejs-packaging | 17-3.module+el8.1.0+3369+37ae6a45 | RHSA-2021:3639 |
| RHEL 8.1 EUS | npm | 1:6.14.14-1.12.22.5.1.module+el8.1.0+12238+63fe3aec | RHSA-2021:3639 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | c-ares +1 | 1.13.0-6.el8 | ALSA-2022:2043 |
| AlmaLinux 8 | nodejs +3 | 1:12.22.5-1.module_el8.4.0+2529+af52a4c7 | ALSA-2021:3623 |
| AlmaLinux 8 | nodejs-nodemon | 2.0.3-1.module_el8.4.0+2521+c668cc9f | ALSA-2021:3666, ALSA-2021:3623 |
| AlmaLinux 8 | nodejs-packaging | 17-3.module_el8.3.0+2023+d2377ea3 | ALSA-2021:3666, ALSA-2021:3623 |
| AlmaLinux 8 | npm | 1:6.14.14-1.12.22.5.1.module_el8.4.0+2529+af52a4c7 | ALSA-2021:3623 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | c-ares | 1.13.0-6.el8 | RLSA-2022:2043 |
| Rocky Linux 8 | nodejs | 1:12.22.5-1.module+el8.4.0+647+e905fa21 | RLSA-2021:3666, RLSA-2021:3623 |
| Rocky Linux 8 | nodejs-nodemon | 2.0.3-1.module+el8.3.0+100+234774f7 | RLSA-2021:3666, RLSA-2021:3623 |
| Rocky Linux 8 | nodejs-packaging | 17-3.module+el8.3.0+101+f84c7154 | RLSA-2021:3666, RLSA-2021:3623 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | c-ares | 1.17.1+20200724-3.14.1 | SUSE-SU-2021:2760-1 |
| SLES 15 SP3 | nodejs12 | 12.22.5-4.19.1 | SUSE-SU-2021:2875-1 |
| SLES 15 SP3 | nodejs14 | 14.17.5-5.15.5 | SUSE-SU-2021:3211-1 |
| SLES 15 SP2 | c-ares | 1.17.1+20200724-3.14.1 | SUSE-SU-2021:2760-1 |
| SLES 15 SP2 | nodejs10 | 10.24.1-1.39.2 | SUSE-SU-2021:2953-1 |
| SLES 15 SP2 | nodejs12 | 12.22.5-4.19.1 | SUSE-SU-2021:2875-1 |
| SLES 15 SP2 | nodejs14 | 14.17.5-5.15.5 | SUSE-SU-2021:3211-1 |
| SLES 15 SP1 | c-ares | 1.17.1+20200724-3.14.1 | SUSE-SU-2021:2760-1 |
| SLES 15 | c-ares | 1.17.1+20200724-3.14.1 | SUSE-SU-2021:2760-1 |
| SLES 12 SP5 | libcares2 | 1.9.1-9.7.1 | SUSE-SU-2021:2690-1 |
Show 22 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP4 | libcares2 | 1.9.1-9.7.1 | SUSE-SU-2021:2690-1 |
| SLES 12 SP3 | libcares2 | 1.9.1-9.7.1 | SUSE-SU-2021:2690-1 |
| SLES 12 SP2 | libcares2 | 1.9.1-9.7.1 | SUSE-SU-2021:2690-1 |
| SLES 12 | nodejs10 | 10.24.1-1.42.2 | SUSE-SU-2021:2823-1 |
| SLES 12 | nodejs12 | 12.22.5-1.35.1 | SUSE-SU-2021:2824-1 |
| SLES 12 | nodejs14 | 14.17.5-6.15.3 | SUSE-SU-2021:3184-1 |
| SLES 11 SP4 | libcares2 | 1.7.4-7.10.3.1 | SUSE-SU-2021:14776-1 |
| SLES for SAP 15 SP1 | c-ares | 1.17.1+20200724-3.14.1 | SUSE-SU-2021:2760-1 |
| SLES for SAP 15 | c-ares | 1.17.1+20200724-3.14.1 | SUSE-SU-2021:2760-1 |
| SLES for SAP 12 SP5 | libcares2 | 1.9.1-9.7.1 | SUSE-SU-2021:2690-1 |
| SLES for SAP 12 SP4 | libcares2 | 1.9.1-9.7.1 | SUSE-SU-2021:2690-1 |
| SLES for SAP 12 SP3 | libcares2 | 1.9.1-9.7.1 | SUSE-SU-2021:2690-1 |
| SLE HPC 15 SP1 | c-ares | 1.17.1+20200724-3.14.1 | SUSE-SU-2021:2760-1 |
| SLE HPC 15 | c-ares | 1.17.1+20200724-3.14.1 | SUSE-SU-2021:2760-1 |
| SUSE OpenStack Cloud Crowbar 9 | libcares2 | 1.9.1-9.7.1 | SUSE-SU-2021:2690-1 |
| SUSE OpenStack Cloud Crowbar 8 | libcares2 | 1.9.1-9.7.1 | SUSE-SU-2021:2690-1 |
| SUSE OpenStack Cloud 9 | libcares2 | 1.9.1-9.7.1 | SUSE-SU-2021:2690-1 |
| SUSE OpenStack Cloud 8 | libcares2 | 1.9.1-9.7.1 | SUSE-SU-2021:2690-1 |
| SUSE Manager Server 4.0 | c-ares | 1.17.1+20200724-3.14.1 | SUSE-SU-2021:2760-1 |
| SUSE Manager Retail Branch Server 4.0 | c-ares | 1.17.1+20200724-3.14.1 | SUSE-SU-2021:2760-1 |
| SUSE Manager Proxy 4.0 | c-ares | 1.17.1+20200724-3.14.1 | SUSE-SU-2021:2760-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | libcares2 | 1.7.4-7.10.3.1 | SUSE-SU-2021:14776-1 |
| SUSE HPE Helion OpenStack 8 | libcares2 | 1.9.1-9.7.1 | SUSE-SU-2021:2690-1 |
| SUSE Enterprise Storage 6 | c-ares | 1.17.1+20200724-3.14.1 | SUSE-SU-2021:2760-1 |
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 Tumbleweed | nodejs16 | 16.6.2-2.2 | openSUSE-SU-2024:11097-1 |
| openSUSE Leap 15.3 | c-ares | 1.17.1+20200724-3.14.1 | openSUSE-SU-2021:2760-1 |
| openSUSE Leap 15.3 | nodejs10 | 10.24.1-1.39.2 | openSUSE-SU-2021:2953-1 |
| openSUSE Leap 15.3 | nodejs12 | 12.22.5-4.19.1 | openSUSE-SU-2021:2875-1 |
| openSUSE Leap 15.3 | nodejs14 | 14.17.5-5.15.5 | openSUSE-SU-2021:3211-1 |
| openSUSE Leap 15.2 | c-ares +1 | 1.17.1+20200724-lp152.2.9.1 | openSUSE-SU-2021:1168-1 |
| openSUSE Leap 15.2 | nodejs10 | 10.24.1-lp152.2.18.1 | openSUSE-SU-2021:1239-1 |
| openSUSE Leap 15.2 | nodejs12 | 12.22.5-lp152.3.18.1 | openSUSE-SU-2021:1214-1 |
| openSUSE Leap 15.2 | nodejs14 | 14.17.5-lp152.14.1 | openSUSE-SU-2021:1313-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | c-ares | 1.17.2-r0 | — |
| Alpine v3.24 | nodejs | 14.17.5-r0 | — |
| Alpine v3.24 | nodejs-current | 16.6.2-r0 | — |
| Alpine v3.23 | c-ares | 1.17.2-r0 | — |
| Alpine v3.23 | nodejs | 14.17.5-r0 | — |
| Alpine v3.23 | nodejs-current | 16.6.2-r0 | — |
| Alpine v3.22 | c-ares | 1.17.2-r0 | — |
| Alpine v3.22 | nodejs | 14.17.5-r0 | — |
| Alpine v3.22 | nodejs-current | 16.6.2-r0 | — |
| Alpine v3.21 | c-ares | 1.17.2-r0 | — |
| Alpine v3.21 | nodejs | 14.17.5-r0 | — |
| Alpine v3.21 | nodejs-current | 16.6.2-r0 | — |
| Alpine v3.20 | c-ares | 1.17.2-r0 | — |
| Alpine v3.20 | nodejs | 14.17.5-r0 | — |
| Alpine v3.20 | nodejs-current | 16.6.2-r0 | — |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | c-ares | 1.17.2-r0 | — |
| Alpine v3.19 | nodejs | 14.17.5-r0 | — |
| Alpine v3.19 | nodejs-current | 16.6.2-r0 | — |
| Alpine v3.18 | c-ares | 1.17.2-r0 | — |
| Alpine v3.18 | nodejs | 14.17.5-r0 | — |
| Alpine v3.18 | nodejs-current | 16.6.2-r0 | — |
| Alpine v3.17 | c-ares | 1.17.2-r0 | — |
| Alpine v3.17 | nodejs | 14.17.5-r0 | — |
| Alpine v3.17 | nodejs-current | 16.6.2-r0 | — |
| Alpine v3.16 | c-ares | 1.17.2-r0 | — |
| Alpine v3.16 | nodejs | 14.17.5-r0 | — |
| Alpine v3.16 | nodejs-current | 16.6.2-r0 | — |
| Alpine v3.15 | c-ares | 1.17.2-r0 | — |
| Alpine v3.15 | nodejs | 14.17.5-r0 | — |
| Alpine v3.15 | nodejs-current | 16.6.2-r0 | — |
| Alpine v3.14 | c-ares | 1.17.2-r0 | — |
| Alpine v3.14 | nodejs | 14.17.5-r0 | — |
| Alpine v3.14 | nodejs-current | 16.11.1-r0 | — |
| Alpine v3.13 | c-ares | 1.17.2-r0 | — |
| Alpine v3.13 | nodejs | 14.17.5-r0 | — |
| Alpine v3.12 | c-ares | 1.17.2-r0 | — |
| Alpine v3.12 | nodejs | 12.22.5-r0 | — |
| Alpine v3.11 | c-ares | 1.17.2-r0 | — |
| Alpine v3.11 | nodejs | 12.22.5-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | c-ares +1 | 1.10.0-3.amzn2.0.4 | ALAS2-2024-2399 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | ceph | 18.2.2-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | c-ares +1 | 1.13.0-6.el8 | ELSA-2022-2043 |
| Oracle Linux 8 | nodejs +3 | 1:12.22.5-1.module+el8.4.0+20308+065a70e3 | ELSA-2021-3666, ELSA-2021-3623 |
| Oracle Linux 8 | nodejs-nodemon | 2.0.3-1.module+el8.3.0+7818+6cd30d85 | ELSA-2021-3666, ELSA-2021-3623 |
| Oracle Linux 8 | nodejs-packaging | 17-3.module+el8.1.0+5393+aaf413e3 | ELSA-2021-3666, ELSA-2021-3623 |
| Oracle Linux 8 | npm | 1:6.14.14-1.12.22.5.1.module+el8.4.0+20308+065a70e3 | ELSA-2021-3666, ELSA-2021-3623 |
Advisories 46
- ALSA-2022:2043 Moderate: c-ares security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2021:3666 Important: nodejs:14 security and bug fix update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2021:3623 Important: nodejs:12 security and bug fix update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2021:3666 Red Hat Security Advisory: nodejs:14 security and bug fix update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RHSA-2021:3639 Red Hat Security Advisory: nodejs:12 security and bug fix update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RHSA-2021:3623 Red Hat Security Advisory: nodejs:12 security and bug fix update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RHSA-2021:3638 Red Hat Security Advisory: nodejs:12 security and bug fix update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RHSA-2021:3281 Red Hat Security Advisory: rh-nodejs12-nodejs and rh-nodejs12-nodejs-nodemon security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RHSA-2021:3280 Red Hat Security Advisory: rh-nodejs14-nodejs and rh-nodejs14-nodejs-nodemon security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- WID-SEC-2022-0029 Elasticsearch und Kibana: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 31, 2026
- RHSA-2022:2043 Red Hat Security Advisory: c-ares security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-5034-2 c-ares vulnerability Ubuntu Security Notices (USN) · Jun 25, 2026
- USN-5034-1 c-ares vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4954-1 c-ares - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2738-1 c-ares - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2021:3623 Important: nodejs:12 security and bug fix update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2022:2043 Moderate: c-ares security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2021:3666 Important: nodejs:14 security and bug fix update Rocky Linux Security Advisories · Feb 4, 2026
- openSUSE-SU-2021:1168-1 Security update for c-ares SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2690-1 Security update for libcares2 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3184-1 Security update for nodejs14 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2760-1 Security update for c-ares SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:2875-1 Security update for nodejs12 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:1313-1 Security update for nodejs14 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
- openSUSE-SU-2021:3211-1 Security update for nodejs14 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11097-1 nodejs16-16.6.2-2.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2875-1 Security update for nodejs12 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2823-1 Security update for nodejs10 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2824-1 Security update for nodejs12 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:14776-1 Security update for libcares2 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:1214-1 Security update for nodejs12 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
- openSUSE-SU-2021:2953-1 Security update for nodejs10 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:2953-1 Security update for nodejs10 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:2760-1 Security update for c-ares SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3211-1 Security update for nodejs14 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:1239-1 Security update for nodejs10 SUSE / openSUSE Security Updates · May 7, 2025
- ICSA-22-069-09 Siemens SINEC INS CISA ICS & IT advisories · May 6, 2025
- ALAS2-2024-2399 Moderate: c-ares security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Jan 9, 2024
- WID-SEC-2023-1614 Tenable Security Nessus Network Monitor: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 25, 2023
- WID-SEC-2023-0856 IBM QRadar SIEM: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 4, 2023
- ELSA-2022-2043 Moderate: c-ares security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 17, 2022
- SSA-389290 SSA-389290: Third-Party Component Vulnerabilities in SINEC INS Siemens ProductCERT · Mar 8, 2022
- ELSA-2021-3666 Important: nodejs:14 security and bug fix update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Sep 27, 2021
- ELSA-2021-3623 Important: nodejs:12 security and bug fix update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Sep 22, 2021