c-ares is an asynchronous resolver library. c-ares is vulnerable to denial of service. If a target resolver sends a query, the attacker forges a malformed UDP packet with a length of 0 and returns them to the target resolver. The target resolver erroneously interprets the 0 length as a graceful shutdown of the connection. This issue has been patched in version 1.19.1.
CVSS Details
- CVSS 3.1 Base Score: 7.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | alma-upgrade-c-aresalma-upgrade-c-ares-develalma-upgrade-nodejsalma-upgrade-nodejs-develalma-upgrade-nodejs-docsalma-upgrade-nodejs-full-i18nalma-upgrade-nodejs-libsalma-upgrade-nodejs-nodemonalma-upgrade-nodejs-packagingalma-upgrade-nodejs-packaging-bundleralma-upgrade-npm | Jun 16, 2023 | May 25, 2023 | |
| Amazon Linux Ami 2 | amazon-linux-ami-2-upgrade-c-aresamazon-linux-ami-2-upgrade-c-ares-debuginfoamazon-linux-ami-2-upgrade-c-ares-develamazon-linux-ami-2-upgrade-ecs-service-connect-agent | Jul 21, 2023 | May 25, 2023 | |
| Amazon_linux | — | amazon-linux-upgrade-c-ares | Jul 4, 2023 | May 25, 2023 |
| Amazon_linux_2023 | amazon-linux-2023-upgrade-c-aresamazon-linux-2023-upgrade-c-ares-debuginfoamazon-linux-2023-upgrade-c-ares-debugsourceamazon-linux-2023-upgrade-c-ares-develamazon-linux-2023-upgrade-ecs-service-connect-agent | Feb 17, 2025 | May 22, 2023 | |
| Centos_linux | — | centos-upgrade-c-arescentos-upgrade-c-ares-debuginfocentos-upgrade-c-ares-devel | Jun 15, 2023 | May 25, 2023 |
| Debian | debian-upgrade-c-ares | Jun 8, 2023 | May 25, 2023 | |
| F5 Big Ip | f5-bigip-upgrade-latest | Jun 17, 2026 | Aug 12, 2023 | |
| Gentoo Linux | gentoo-linux-upgrade-net-dns-c-ares | Oct 10, 2023 | May 25, 2023 | |
| Huawei Euleros 2_0_sp10 | huawei-euleros-2_0_sp10-upgrade-c-ares | Jul 18, 2023 | May 25, 2023 | |
| Huawei Euleros 2_0_sp11 | huawei-euleros-2_0_sp11-upgrade-c-ares | Jan 10, 2024 | May 25, 2023 | |
| Huawei Euleros 2_0_sp8 | huawei-euleros-2_0_sp8-upgrade-c-areshuawei-euleros-2_0_sp8-upgrade-c-ares-devel | Jan 10, 2024 | May 25, 2023 | |
| Huawei Euleros 2_0_sp9 | huawei-euleros-2_0_sp9-upgrade-c-ares | Aug 9, 2023 | May 25, 2023 | |
| Oracle_linux | — | oracle-linux-upgrade-c-aresoracle-linux-upgrade-c-ares-develoracle-linux-upgrade-nodejsoracle-linux-upgrade-nodejs-develoracle-linux-upgrade-nodejs-docsoracle-linux-upgrade-nodejs-full-i18noracle-linux-upgrade-nodejs-libsoracle-linux-upgrade-nodejs-nodemonoracle-linux-upgrade-nodejs-packagingoracle-linux-upgrade-nodejs-packaging-bundleroracle-linux-upgrade-npm | Jun 14, 2023 | May 22, 2023 |
| Redhat_linux | redhat-upgrade-c-aresredhat-upgrade-c-ares-debuginforedhat-upgrade-c-ares-debugsourceredhat-upgrade-c-ares-develredhat-upgrade-nodejsredhat-upgrade-nodejs-debuginforedhat-upgrade-nodejs-debugsourceredhat-upgrade-nodejs-develredhat-upgrade-nodejs-docsredhat-upgrade-nodejs-full-i18nredhat-upgrade-nodejs-libsredhat-upgrade-nodejs-libs-debuginforedhat-upgrade-nodejs-nodemonredhat-upgrade-nodejs-packagingredhat-upgrade-nodejs-packaging-bundlerredhat-upgrade-npm | Jun 15, 2023 | May 25, 2023 | |
| Rocky_linux | rocky-upgrade-c-aresrocky-upgrade-c-ares-debuginforocky-upgrade-c-ares-debugsourcerocky-upgrade-c-ares-develrocky-upgrade-nodejsrocky-upgrade-nodejs-debuginforocky-upgrade-nodejs-debugsourcerocky-upgrade-nodejs-develrocky-upgrade-nodejs-full-i18nrocky-upgrade-npm | Mar 5, 2024 | May 25, 2023 | |
| Suse | — | suse-upgrade-c-ares-develsuse-upgrade-c-ares-utilssuse-upgrade-corepack16suse-upgrade-corepack18suse-upgrade-libcares-develsuse-upgrade-libcares2suse-upgrade-libcares2-32bitsuse-upgrade-nodejs16suse-upgrade-nodejs16-develsuse-upgrade-nodejs16-docssuse-upgrade-nodejs18suse-upgrade-nodejs18-develsuse-upgrade-nodejs18-docssuse-upgrade-npm16suse-upgrade-npm18 | May 31, 2023 | May 25, 2023 |
| Ubuntu | ubuntu-pro-upgrade-libc-ares2ubuntu-upgrade-libc-ares2 | Jun 15, 2023 | May 25, 2023 | |
| Vmware Photon_os | vmware-photon_os_update_tdnf | Jan 20, 2025 | May 25, 2023 |
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