{"id":"USN-7739-1","summary":"bind9 vulnerabilities","details":"Greg Kuechle discovered that Bind incorrectly handled certain incremental\nzone updates. A remote attacker could possibly use this issue to cause Bind\nto crash, resulting in a denial of service. (CVE-2021-25214)\n\nSiva Kakarla discovered that Bind incorrectly handled certain DNAME\nrecords. A remote attacker could possibly use this issue to cause Bind to\ncrash, resulting in a denial of service. (CVE-2021-25215)\n\nIt was discovered that Bind incorrectly handled GSSAPI security policy\nnegotiation. A remote attacker could use this issue to cause Bind to crash,\nresulting in a denial of service, or possibly execute arbitrary code.\n(CVE-2021-25216)","modified":"2026-04-22T11:01:19.916857Z","published":"2025-09-08T00:14:04Z","related":["UBUNTU-CVE-2021-25214","UBUNTU-CVE-2021-25215","UBUNTU-CVE-2021-25216"],"upstream":["CVE-2021-25214","CVE-2021-25215","CVE-2021-25216","UBUNTU-CVE-2021-25214","UBUNTU-CVE-2021-25215","UBUNTU-CVE-2021-25216"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7739-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-25214"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-25215"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-25216"}],"affected":[{"package":{"name":"bind9","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/bind9@1:9.9.5.dfsg-3ubuntu0.19+esm13?arch=source&distro=esm-infra-legacy/trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.9.5.dfsg-3ubuntu0.19+esm13"}]}],"versions":["1:9.9.3.dfsg.P2-4ubuntu1","1:9.9.3.dfsg.P2-4ubuntu2","1:9.9.3.dfsg.P2-4ubuntu3","1:9.9.5.dfsg-2","1:9.9.5.dfsg-3","1:9.9.5.dfsg-3ubuntu0.1","1:9.9.5.dfsg-3ubuntu0.2","1:9.9.5.dfsg-3ubuntu0.3","1:9.9.5.dfsg-3ubuntu0.4","1:9.9.5.dfsg-3ubuntu0.5","1:9.9.5.dfsg-3ubuntu0.6","1:9.9.5.dfsg-3ubuntu0.7","1:9.9.5.dfsg-3ubuntu0.8","1:9.9.5.dfsg-3ubuntu0.9","1:9.9.5.dfsg-3ubuntu0.10","1:9.9.5.dfsg-3ubuntu0.11","1:9.9.5.dfsg-3ubuntu0.12","1:9.9.5.dfsg-3ubuntu0.13","1:9.9.5.dfsg-3ubuntu0.14","1:9.9.5.dfsg-3ubuntu0.15","1:9.9.5.dfsg-3ubuntu0.16","1:9.9.5.dfsg-3ubuntu0.17","1:9.9.5.dfsg-3ubuntu0.18","1:9.9.5.dfsg-3ubuntu0.19","1:9.9.5.dfsg-3ubuntu0.19+esm1","1:9.9.5.dfsg-3ubuntu0.19+esm2","1:9.9.5.dfsg-3ubuntu0.19+esm3","1:9.9.5.dfsg-3ubuntu0.19+esm4","1:9.9.5.dfsg-3ubuntu0.19+esm5","1:9.9.5.dfsg-3ubuntu0.19+esm6","1:9.9.5.dfsg-3ubuntu0.19+esm7","1:9.9.5.dfsg-3ubuntu0.19+esm9","1:9.9.5.dfsg-3ubuntu0.19+esm10","1:9.9.5.dfsg-3ubuntu0.19+esm11","1:9.9.5.dfsg-3ubuntu0.19+esm12"],"ecosystem_specific":{"binaries":[{"binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm13","binary_name":"bind9"},{"binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm13","binary_name":"bind9-host"},{"binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm13","binary_name":"bind9utils"},{"binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm13","binary_name":"dnsutils"},{"binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm13","binary_name":"host"},{"binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm13","binary_name":"libbind9-90"},{"binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm13","binary_name":"libdns100"},{"binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm13","binary_name":"libisc95"},{"binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm13","binary_name":"libisccc90"},{"binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm13","binary_name":"libisccfg90"},{"binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm13","binary_name":"liblwres90"},{"binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm13","binary_name":"lwresd"}],"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7739-1.json","cves_map":{"cves":[{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-25214"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-25215"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-25216"}],"ecosystem":"Ubuntu:Pro:14.04:LTS"}}}],"schema_version":"1.7.5"}