{"schema_version":"1.7.5","id":"CVE-2021-3672","published":"2021-11-23T19:15:07.877Z","modified":"2026-07-08T06:02:36.421053150Z","aliases":["BIT-node-2021-3672","BIT-node-min-2021-3672","BIT-pgbouncer-2021-3672"],"related":["ALSA-2021:3623","ALSA-2021:3666","ALSA-2022:2043","SUSE-SU-2021:14776-1","SUSE-SU-2021:2690-1","SUSE-SU-2021:2760-1","SUSE-SU-2021:2823-1","SUSE-SU-2021:2824-1","SUSE-SU-2021:2875-1","SUSE-SU-2021:2953-1","SUSE-SU-2021:3184-1","SUSE-SU-2021:3211-1","openSUSE-SU-2021:1168-1","openSUSE-SU-2021:1214-1","openSUSE-SU-2021:1239-1","openSUSE-SU-2021:1313-1","openSUSE-SU-2021:2760-1","openSUSE-SU-2021:2875-1","openSUSE-SU-2021:2953-1","openSUSE-SU-2021:3211-1","openSUSE-SU-2024:10668-1","openSUSE-SU-2024:11096-1","openSUSE-SU-2024:11097-1"],"details":"A flaw was found in c-ares library, where a missing input validation check of host names returned by DNS (Domain Name Servers) can lead to output of wrong hostnames which might potentially lead to Domain Hijacking. The highest threat from this vulnerability is to confidentiality and integrity as well as system availability.","affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/c-ares/c-ares","events":[{"introduced":"0"},{"fixed":"6654436a307a5a686b008c1d4c93b0085da6e6d8"}],"database_specific":{"cpe":"cpe:2.3:a:c-ares_project:c-ares:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"1.0.0"},{"fixed":"1.17.2"}],"source":"CPE_RANGE"}}],"versions":["cares-1_17_1","c-ares-1_17_0","cares-1_16_1","cares-1_16_0","cares-1_15_0","cares-1_14_0","cares-1_13_0","cares-1_12_0","cares-1_11_0","cares-1_11_0-rc1","cares-1_10_0","cares-1_9_1","cares-1_9_0","cares-1_8_0","cares-1_7_5","cares-1_7_4","cares-1_7_3","cares-1_7_2","cares-1_7_1","curl-7_20_0","cares-1_7_0","curl-7_19_7","curl-7_19_6","curl-7_19_5","curl-7_19_4","curl-7_19_3","cares-1_6_0","curl-7_19_2","curl-7_19_0","cares-1_5_3","curl-7_18_2","cares-1_5_2","curl-7_18_1","curl-7_18_0","cares-1_5_1","cares-1_5_0","curl-7_17_1","curl-7_17_0","curl-7_16_4","curl-7_16_3","cares-1_4_0","curl-7_16_2","curl-7_16_1","cares-1_3_2","curl-7_16_0","curl-7_15_6-prepipeline","curl-7_15_5","cares-1_3_1","curl-7_15_4","curl-7_15_3","curl-7_15_1","curl-7_15_0","curl-7_14_1","curl-7_14_0","curl-7_13_2","curl-7_13_1","curl-7_13_0","cares-1_2_1","curl-7_12_2","curl-7_12_1","curl-7_12_0","c-ares-1_2_0","curl-7_11_1","cares-1_1_0","curl-7_11_0","curl-7_10_8"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3672.json"}},{"ranges":[{"type":"GIT","repo":"https://github.com/nodejs/node","events":[{"introduced":"2f45ad8060e13d5ac912335096d21526f2f9602b"},{"last_affected":"921493e2287aa895679620155b5288b2e1587bfd"},{"introduced":"42cce5a9d0fd905bf4ad7a2528c36572dfb8b5ad"},{"fixed":"151261efb8b85696620f80ecc1f50d9c1f886a1b"},{"introduced":"73aa21658dfa6a22c06451d080152b32b1f98dbe"},{"last_affected":"354b6a93bd1d66f1833489d6fe01a2b0e8f6aff9"},{"introduced":"c1da528bc25c9cc5a8240a7b4f136f5968f6e113"},{"fixed":"db159ab870b1aa7f55e4e450c81764f22bf0ef80"},{"introduced":"7162e686b18d22b4385fa5c04274fb04dbd810c7"},{"fixed":"bfe80913e88139da1aa283475cdbc060ea98ae6f"}],"database_specific":{"cpe":["cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:*","cpe:2.3:a:nodejs:node.js:*:*:*:*:lts:*:*:*"],"extracted_events":[{"introduced":"12.0.0"},{"last_affected":"12.12.0"},{"introduced":"12.13.0"},{"fixed":"12.22.5"},{"introduced":"14.0.0"},{"last_affected":"14.14.0"},{"introduced":"14.15.0"},{"fixed":"14.17.5"},{"introduced":"16.0.0"},{"fixed":"16.6.2"}],"source":"CPE_RANGE"}}],"versions":["v16.6.1","v16.6.0","v14.17.4","v12.22.4","v16.5.0","v16.4.2","v14.17.3","v12.22.3","v14.17.2","v16.4.1","v12.22.2","v16.4.0","v14.17.1","v16.3.0","v16.2.0","v14.17.0","v16.1.0","v16.0.0","v14.16.1","v12.22.1","v12.22.0","v14.16.0","v12.21.0","v12.20.2","v14.15.5","v14.15.4","v12.20.1","v14.15.3","v14.15.2","v12.20.0","v12.19.1","v14.15.1","v14.15.0","v14.14.0","v14.13.1","v12.19.0","v14.13.0","v14.12.0","v12.18.4","v14.11.0","v14.10.1","v14.10.0","v14.9.0","v14.8.0","v14.7.0","v12.18.3","v14.6.0","v14.5.0","v12.18.2","v12.18.1","v12.18.0","v14.4.0","v12.17.0","v14.3.0","v14.2.0","v14.1.0","v12.16.3","v14.0.0","v12.16.2","v12.16.1","v12.16.0","v12.15.0","v12.14.1","v12.14.0","v12.13.1","v12.13.0","v12.12.0","v12.11.1","v12.11.0","v12.10.0","v12.9.1","v12.9.0","v12.8.1","v12.8.0","v12.7.0","v12.6.0","v12.5.0","v12.4.0","v12.3.1","v12.3.0","v12.2.0","v12.1.0","v12.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3672.json"}}],"references":[{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202401-02"},{"type":"ADVISORY","url":"https://www.oracle.com/security-alerts/cpujul2022.html"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1988342"},{"type":"FIX","url":"https://c-ares.haxx.se/adv_20210810.html"},{"type":"FIX","url":"https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf"}],"database_specific":{"unresolved_ranges":[{"cpes":["cpe:2.3:a:pgbouncer:pgbouncer:*:*:*:*:*:*:*:*"],"extracted_events":[{"last_affected":"1.17.0"}],"source":"CPE_RANGE","vendor_product":"pgbouncer:pgbouncer"},{"cpes":["cpe:2.3:a:siemens:sinec_infrastructure_network_services:*:*:*:*:*:*:*:*"],"extracted_events":[{"fixed":"1.0.1.1"}],"source":"CPE_RANGE","vendor_product":"siemens:sinec_infrastructure_network_services"},{"cpes":["cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*","cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"33"},{"last_affected":"33"},{"introduced":"34"},{"last_affected":"34"}],"source":"CPE_STRING","vendor_product":"fedoraproject:fedora"},{"cpes":["cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*","cpe:2.3:o:redhat:enterprise_linux:7.7:*:*:*:*:*:*:*","cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"7.0"},{"last_affected":"7.0"},{"introduced":"7.7"},{"last_affected":"7.7"},{"introduced":"8.0"},{"last_affected":"8.0"}],"source":"CPE_STRING","vendor_product":"redhat:enterprise_linux"},{"cpes":["cpe:2.3:o:redhat:enterp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