{"id":"UBUNTU-CVE-2024-25629","details":"c-ares is a C library for asynchronous DNS requests. `ares__read_line()` is used to parse local configuration files such as `/etc/resolv.conf`, `/etc/nsswitch.conf`, the `HOSTALIASES` file, and if using a c-ares version prior to 1.27.0, the `/etc/hosts` file. If any of these configuration files has an embedded `NULL` character as the first character in a new line, it can lead to attempting to read memory prior to the start of the given buffer which may result in a crash. This issue is fixed in c-ares 1.27.0. No known workarounds exist.","modified":"2026-04-22T14:42:26.482483Z","published":"2024-02-23T15:15:00Z","related":["USN-6676-1"],"upstream":["CVE-2024-25629"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2024-25629"},{"type":"REPORT","url":"https://github.com/c-ares/c-ares/security/advisories/GHSA-mg26-v6qh-x48q"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6676-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2024-25629"}],"affected":[{"package":{"name":"c-ares","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/c-ares@1.10.0-3ubuntu0.2+esm3?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.10.0-3ubuntu0.2+esm3"}]}],"versions":["1.10.0-2","1.10.0-3","1.10.0-3ubuntu0.1","1.10.0-3ubuntu0.2","1.10.0-3ubuntu0.2+esm1","1.10.0-3ubuntu0.2+esm2"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_name":"libc-ares2","binary_version":"1.10.0-3ubuntu0.2+esm3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-25629.json"}},{"package":{"name":"c-ares","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/c-ares@1.14.0-1ubuntu0.2+esm2?arch=source&distro=esm-infra/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.14.0-1ubuntu0.2+esm2"}]}],"versions":["1.13.0-2","1.13.0-3","1.14.0-1","1.14.0-1ubuntu0.1","1.14.0-1ubuntu0.2","1.14.0-1ubuntu0.2+esm1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_name":"libc-ares2","binary_version":"1.14.0-1ubuntu0.2+esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-25629.json"}},{"package":{"name":"c-ares","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/c-ares@1.15.0-1ubuntu0.5?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.15.0-1ubuntu0.5"}]}],"versions":["1.15.0-1build1","1.15.0-1ubuntu0.1","1.15.0-1ubuntu0.2","1.15.0-1ubuntu0.3","1.15.0-1ubuntu0.4"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1.15.0-1ubuntu0.5","binary_name":"libc-ares2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-25629.json"}},{"package":{"name":"c-ares","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/c-ares@1.18.1-1ubuntu0.22.04.3?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.1-1ubuntu0.22.04.3"}]}],"versions":["1.17.1-1ubuntu1","1.18.1-1","1.18.1-1build1","1.18.1-1ubuntu0.22.04.1","1.18.1-1ubuntu0.22.04.2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libc-ares2","binary_version":"1.18.1-1ubuntu0.22.04.3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-25629.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}