{"schema_version":"1.7.3","id":"SUSE-SU-2021:2760-1","published":"2021-08-17T15:12:07Z","modified":"2026-02-04T03:45:58.685920Z","related":["CVE-2021-3672"],"upstream":["CVE-2021-3672"],"summary":"Security update for c-ares","details":"This update for c-ares fixes the following issues:\n\nVersion update to git snapshot 1.17.1+20200724:\n\n- CVE-2021-3672: fixed missing input validation on hostnames returned by DNS servers (bsc#1188881)\n- If ares_getaddrinfo() was terminated by an ares_destroy(), it would cause crash\n- Crash in sortaddrinfo() if the list size equals 0 due to an unexpected DNS response\n- Expand number of escaped characters in DNS replies as per RFC1035 5.1 to prevent spoofing\n- Use unbuffered /dev/urandom for random data to prevent early startup performance issues\n","affected":[{"package":{"name":"c-ares","ecosystem":"SUSE:Linux Enterprise Module for Basesystem 15 SP2","purl":"pkg:rpm/suse/c-ares&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP2"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.17.1+20200724-3.14.1"}]}],"ecosystem_specific":{"binaries":[{"c-ares-devel":"1.17.1+20200724-3.14.1","libcares2":"1.17.1+20200724-3.14.1"}]},"database_specific":{"source":"https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2021:2760-1.json"}},{"package":{"name":"c-ares","ecosystem":"SUSE:Linux Enterprise Module for Basesystem 15 SP3","purl":"pkg:rpm/suse/c-ares&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP3"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.17.1+20200724-3.14.1"}]}],"ecosystem_specific":{"binaries":[{"c-ares-devel":"1.17.1+20200724-3.14.1","libcares2":"1.17.1+20200724-3.14.1"}]},"database_specific":{"source":"https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2021:2760-1.json"}},{"package":{"name":"c-ares","ecosystem":"SUSE:Linux Enterprise High Performance Computing 15-ESPOS","purl":"pkg:rpm/suse/c-ares&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOS"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.17.1+20200724-3.14.1"}]}],"ecosystem_specific":{"binaries":[{"c-ares-devel":"1.17.1+20200724-3.14.1","libcares2":"1.17.1+20200724-3.14.1"}]},"database_specific":{"source":"https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2021:2760-1.json"}},{"package":{"name":"c-ares","ecosystem":"SUSE:Linux Enterprise High Performance Computing 15-LTSS","purl":"pkg:rpm/suse/c-ares&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSS"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.17.1+20200724-3.14.1"}]}],"ecosystem_specific":{"binaries":[{"c-ares-devel":"1.17.1+20200724-3.14.1","libcares2":"1.17.1+20200724-3.14.1"}]},"database_specific":{"source":"https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2021:2760-1.json"}},{"package":{"name":"c-ares","ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS","purl":"pkg:rpm/suse/c-ares&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-ESPOS"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.17.1+20200724-3.14.1"}]}],"ecosystem_specific":{"binaries":[{"c-ares-devel":"1.17.1+20200724-3.14.1","libcares2":"1.17.1+20200724-3.14.1"}]},"database_specific":{"source":"https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2021:2760-1.json"}},{"package":{"name":"c-ares","ecosystem":"SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS","purl":"pkg:rpm/suse/c-ares&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSS"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.17.1+20200724-3.14.1"}]}],"ecosystem_specific":{"binaries":[{"c-ares-devel":"1.17.1+20200724-3.14.1","libcares2":"1.17.1+20200724-3.14.1"}]},"database_specific":{"source":"https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2021:2760-1.json"}},{"package":{"name":"c-ares","ecosystem":"SUSE:Linux Enterprise Server 15-LTSS","purl":"pkg:rpm/suse/c-ares&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSS"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.17.1+20200724-3.14.1"}]}],"ecosystem_specific":{"binaries":[{"c-ares-devel":"1.17.1+20200724-3.14.1","libcares2":"1.17.1+20200724-3.14.1"}]},"database_specific":{"source":"https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2021:2760-1.json"}},{"package":{"name":"c-ares","ecosystem":"SUSE:Linux Enterprise Server 15 SP1-BCL","purl":"pkg:rpm/suse/c-ares&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-BCL"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.17.1+20200724-3.14.1"}]}],"ecosystem_specific":{"binaries":[{"c-ares-devel":"1.17.1+20200724-3.14.1","libcares2":"1.17.1+20200724-3.14.1"}]},"database_specific":{"source":"https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2021:2760-1.json"}},{"package":{"name":"c-ares","ecosystem":"SUSE:Linux Enterprise Server 15 SP1-LTSS","purl":"pkg:rpm/suse/c-ares&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSS"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.17.1+20200724-3.14.1"}]}],"ecosystem_specific":{"binaries":[{"c-ares-devel":"1.17.1+20200724-3.14.1","libcares2":"1.17.1+20200724-3.14.1"}]},"database_specific":{"source":"https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2021:2760-1.json"}},{"package":{"name":"c-ares","ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 15","purl":"pkg:rpm/suse/c-ares&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.17.1+20200724-3.14.1"}]}],"ecosystem_specific":{"binaries":[{"c-ares-devel":"1.17.1+20200724-3.14.1","libcares2":"1.17.1+20200724-3.14.1"}]},"database_specific":{"source":"https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2021:2760-1.json"}},{"package":{"name":"c-ares","ecosystem":"SUSE:Linux Enterprise Server for SAP Applications 15 SP1","purl":"pkg:rpm/suse/c-ares&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.17.1+20200724-3.14.1"}]}],"ecosystem_specific":{"binaries":[{"c-ares-devel":"1.17.1+20200724-3.14.1","libcares2":"1.17.1+20200724-3.14.1"}]},"database_specific":{"source":"https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2021:2760-1.json"}},{"package":{"name":"c-ares","ecosystem":"SUSE:Manager Proxy 4.0","purl":"pkg:rpm/suse/c-ares&distro=SUSE%20Manager%20Proxy%204.0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.17.1+20200724-3.14.1"}]}],"ecosystem_specific":{"binaries":[{"c-ares-devel":"1.17.1+20200724-3.14.1","libcares2":"1.17.1+20200724-3.14.1"}]},"database_specific":{"source":"https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2021:2760-1.json"}},{"package":{"name":"c-ares","ecosystem":"SUSE:Manager Retail Branch Server 4.0","purl":"pkg:rpm/suse/c-ares&distro=SUSE%20Manager%20Retail%20Branch%20Server%204.0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.17.1+20200724-3.14.1"}]}],"ecosystem_specific":{"binaries":[{"c-ares-devel":"1.17.1+20200724-3.14.1","libcares2":"1.17.1+20200724-3.14.1"}]},"database_specific":{"source":"https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2021:2760-1.json"}},{"package":{"name":"c-ares","ecosystem":"SUSE:Manager Server 4.0","purl":"pkg:rpm/suse/c-ares&distro=SUSE%20Manager%20Server%204.0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.17.1+20200724-3.14.1"}]}],"ecosystem_specific":{"binaries":[{"c-ares-devel":"1.17.1+20200724-3.14.1","libcares2":"1.17.1+20200724-3.14.1"}]},"database_specific":{"source":"https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2021:2760-1.json"}},{"package":{"name":"c-ares","ecosystem":"SUSE:Enterprise Storage 6","purl":"pkg:rpm/suse/c-ares&distro=SUSE%20Enterprise%20Storage%206"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.17.1+20200724-3.14.1"}]}],"ecosystem_specific":{"binaries":[{"c-ares-devel":"1.17.1+20200724-3.14.1","libcares2":"1.17.1+20200724-3.14.1"}]},"database_specific":{"source":"https://ftp.suse.com/pub/projects/security/osv/SUSE-SU-2021:2760-1.json"}}],"references":[{"type":"ADVISORY","url":"https://www.suse.com/support/update/announcement/2021/suse-su-20212760-1/"},{"type":"REPORT","url":"https://bugzilla.suse.com/1188881"},{"type":"WEB","url":"https://www.suse.com/security/cve/CVE-2021-3672"}]}