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 | — | Upgrade c-ares-develUpgrade nodejs-nodemonUpgrade nodejs-full-i18nUpgrade nodejs-libsUpgrade npmUpgrade nodejs-packagingUpgrade c-aresUpgrade nodejs-develUpgrade nodejs-docsUpgrade nodejsUpgrade nodejs-packaging-bundler | Jun 16, 2023 | May 25, 2023 |
| Amazon Linux Ami 2 | — | Upgrade c-aresUpgrade c-ares-debuginfoUpgrade c-ares-develUpgrade ecs-service-connect-agent | Jul 21, 2023 | May 25, 2023 |
| Amazon_linux | — | Upgrade c-ares | Jul 4, 2023 | May 25, 2023 |
| Amazon_linux_2023 | — | Upgrade c-ares-debuginfoUpgrade c-aresUpgrade c-ares-develUpgrade c-ares-debugsourceUpgrade ecs-service-connect-agent | Feb 17, 2025 | May 22, 2023 |
| Centos_linux | — | Upgrade c-ares-develUpgrade c-ares-debuginfoUpgrade c-ares | Jun 15, 2023 | May 25, 2023 |
| Debian | — | Upgrade c-ares | Jun 8, 2023 | May 25, 2023 |
| F5 Big Ip | — | Update F5 BIG-IP to the latest version | Jun 17, 2026 | Aug 11, 2023 |
| Gentoo Linux | — | Upgrade net-dns/c-ares. | Oct 10, 2023 | May 25, 2023 |
| Huawei Euleros 2_0_sp10 | — | Upgrade c-ares | Jul 18, 2023 | May 25, 2023 |
| Huawei Euleros 2_0_sp11 | — | Upgrade c-ares | Jan 10, 2024 | May 25, 2023 |
| Huawei Euleros 2_0_sp8 | — | Upgrade c-aresUpgrade c-ares-devel | Jan 10, 2024 | May 25, 2023 |
| Huawei Euleros 2_0_sp9 | — | Upgrade c-ares | Aug 9, 2023 | May 25, 2023 |
| Oracle_linux | — | Upgrade npmUpgrade nodejs-packaging-bundlerUpgrade c-aresUpgrade nodejs-docsUpgrade nodejs-nodemonUpgrade nodejs-develUpgrade nodejs-full-i18nUpgrade nodejs-libsUpgrade c-ares-develUpgrade nodejsUpgrade nodejs-packaging | Jun 14, 2023 | May 22, 2023 |
| Redhat_linux | — | Upgrade c-ares-debuginfoUpgrade nodejs-develUpgrade nodejs-nodemonUpgrade nodejs-libsUpgrade c-aresUpgrade c-ares-develUpgrade nodejsUpgrade npmUpgrade c-ares-debugsourceUpgrade nodejs-libs-debuginfoUpgrade nodejs-docsUpgrade nodejs-full-i18nUpgrade nodejs-debuginfoUpgrade nodejs-packagingUpgrade nodejs-debugsourceNo solution existsUpgrade nodejs-packaging-bundler | Jun 15, 2023 | May 25, 2023 |
| Rocky_linux | — | Upgrade nodejs-debugsourceUpgrade nodejs-debuginfoUpgrade nodejs-develUpgrade nodejs-full-i18nUpgrade npmUpgrade nodejsUpgrade c-ares-debuginfoUpgrade c-aresUpgrade c-ares-debugsourceUpgrade c-ares-devel | Mar 5, 2024 | May 25, 2023 |
| Suse | — | Upgrade libcares-develUpgrade corepack16Upgrade npm18Upgrade libcares2-32bitUpgrade nodejs18-docsUpgrade npm16Upgrade nodejs18-develUpgrade nodejs18Upgrade nodejs16Upgrade libcares2Upgrade c-ares-develUpgrade nodejs16-develUpgrade corepack18Upgrade c-ares-utilsUpgrade nodejs16-docs | May 31, 2023 | May 25, 2023 |
| Ubuntu | — | Upgrade libc-ares2 (Ubuntu Pro)Upgrade libc-ares2 | Jun 15, 2023 | May 25, 2023 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | May 25, 2023 |
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