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c-ares is an asynchronous resolver library. When /dev/urandom or RtlGenRandom() are unavailable, c-ares uses rand() to generate random numbers used for DNS query ids. This is not a CSPRNG, and it is also not seeded by srand() so will generate predictable output. Input from the random number generator is fed into a non-compilant RC4 implementation and may not be as strong as the original RC4 implementation. No attempt is made to look for modern OS-provided CSPRNGs like arc4random() that is widely available. This issue has been fixed in version 1.19.1.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade nodejs-nodemonUpgrade nodejs-full-i18nUpgrade c-ares-develUpgrade nodejs-docsUpgrade nodejs-libsUpgrade nodejs-develUpgrade npmUpgrade nodejsUpgrade c-aresUpgrade nodejs-packaging-bundlerUpgrade nodejs-packaging | Jun 27, 2023 | May 25, 2023 |
| Amazon Linux Ami 2 | — | Upgrade c-ares-debuginfoUpgrade ecs-service-connect-agentUpgrade c-aresUpgrade c-ares-devel | Sep 28, 2023 | May 25, 2023 |
| Amazon_linux_2023 | — | Upgrade c-ares-debuginfoUpgrade ecs-service-connect-agentUpgrade c-ares-debugsourceUpgrade c-aresUpgrade c-ares-devel | Feb 17, 2025 | May 22, 2023 |
| Centos_linux | — | Upgrade npmUpgrade c-ares-develUpgrade nodejs-full-i18nUpgrade nodejsUpgrade nodejs-nodemonUpgrade c-ares-debugsourceUpgrade nodejs-libsUpgrade nodejs-debugsourceUpgrade nodejs-packagingUpgrade c-ares-debuginfoUpgrade nodejs-packaging-bundlerUpgrade nodejs-develUpgrade nodejs-docsUpgrade nodejs-libs-debuginfoUpgrade nodejs-debuginfoUpgrade c-ares | Jun 15, 2023 | May 25, 2023 |
| Debian | — | Upgrade c-ares | May 15, 2025 | May 25, 2023 |
| Gentoo Linux | — | Upgrade net-dns/c-ares. | Oct 10, 2023 | May 25, 2023 |
| Huawei Euleros 2_0_sp10 | — | Upgrade c-ares | Jan 10, 2024 | May 25, 2023 |
| Huawei Euleros 2_0_sp11 | — | Upgrade c-ares | Jan 10, 2024 | May 25, 2023 |
| Huawei Euleros 2_0_sp8 | — | Upgrade c-ares-develUpgrade c-ares | Jan 10, 2024 | May 25, 2023 |
| Huawei Euleros 2_0_sp9 | — | Upgrade c-ares | Aug 9, 2023 | May 25, 2023 |
| Oracle_linux | — | Upgrade nodejs-nodemonUpgrade nodejs-packaging-bundlerUpgrade nodejs-libsUpgrade nodejs-packagingUpgrade nodejsUpgrade nodejs-docsUpgrade nodejs-full-i18nUpgrade c-aresUpgrade nodejs-develUpgrade npmUpgrade c-ares-devel | Jun 15, 2023 | May 22, 2023 |
| Redhat_linux | — | Upgrade nodejs-develUpgrade c-aresUpgrade c-ares-debugsourceUpgrade c-ares-debuginfoUpgrade nodejs-debuginfoUpgrade nodejs-packaging-bundlerUpgrade npmUpgrade nodejs-nodemonUpgrade nodejs-packagingUpgrade nodejs-debugsourceUpgrade nodejs-docsUpgrade nodejs-libs-debuginfoNo solution existsUpgrade nodejs-libsUpgrade nodejs-full-i18nUpgrade c-ares-develUpgrade nodejs | Jun 15, 2023 | May 25, 2023 |
| Rocky_linux | — | Upgrade nodejs-debugsourceUpgrade nodejs-develUpgrade nodejs-full-i18nUpgrade nodejs-debuginfoUpgrade npmUpgrade nodejs | Mar 5, 2024 | May 25, 2023 |
| Suse | — | Upgrade nodejs18-develUpgrade nodejs16Upgrade c-ares-utilsUpgrade libcares2Upgrade corepack16Upgrade c-ares-develUpgrade nodejs16-develUpgrade npm18Upgrade npm16Upgrade nodejs18-docsUpgrade libcares2-32bitUpgrade libcares-develUpgrade nodejs18Upgrade nodejs16-docsUpgrade corepack18 | May 31, 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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