{"id":"USN-4929-1","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)\n","modified":"2026-04-22T10:13:57.319279Z","published":"2021-04-29T11:11:53Z","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-4929-1"},{"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:16.04:LTS","purl":"pkg:deb/ubuntu/bind9@1:9.10.3.dfsg.P4-8ubuntu1.19?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.10.3.dfsg.P4-8ubuntu1.19"}]}],"versions":["1:9.9.5.dfsg-11ubuntu1","1:9.9.5.dfsg-12","1:9.9.5.dfsg-12.1","1:9.9.5.dfsg-12.1ubuntu1","1:9.10.3.dfsg.P2-4","1:9.10.3.dfsg.P2-5","1:9.10.3.dfsg.P4-3","1:9.10.3.dfsg.P4-4","1:9.10.3.dfsg.P4-5","1:9.10.3.dfsg.P4-8","1:9.10.3.dfsg.P4-8ubuntu1","1:9.10.3.dfsg.P4-8ubuntu1.1","1:9.10.3.dfsg.P4-8ubuntu1.2","1:9.10.3.dfsg.P4-8ubuntu1.3","1:9.10.3.dfsg.P4-8ubuntu1.4","1:9.10.3.dfsg.P4-8ubuntu1.5","1:9.10.3.dfsg.P4-8ubuntu1.6","1:9.10.3.dfsg.P4-8ubuntu1.7","1:9.10.3.dfsg.P4-8ubuntu1.8","1:9.10.3.dfsg.P4-8ubuntu1.9","1:9.10.3.dfsg.P4-8ubuntu1.10","1:9.10.3.dfsg.P4-8ubuntu1.11","1:9.10.3.dfsg.P4-8ubuntu1.12","1:9.10.3.dfsg.P4-8ubuntu1.14","1:9.10.3.dfsg.P4-8ubuntu1.15","1:9.10.3.dfsg.P4-8ubuntu1.16","1:9.10.3.dfsg.P4-8ubuntu1.17","1:9.10.3.dfsg.P4-8ubuntu1.18"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19","binary_name":"bind9"},{"binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19","binary_name":"bind9-host"},{"binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19","binary_name":"bind9utils"},{"binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19","binary_name":"dnsutils"},{"binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19","binary_name":"host"},{"binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19","binary_name":"libbind9-140"},{"binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19","binary_name":"libdns-export162"},{"binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19","binary_name":"libdns162"},{"binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19","binary_name":"libirs-export141"},{"binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19","binary_name":"libirs141"},{"binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19","binary_name":"libisc-export160"},{"binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19","binary_name":"libisc160"},{"binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19","binary_name":"libisccc-export140"},{"binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19","binary_name":"libisccc140"},{"binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19","binary_name":"libisccfg-export140"},{"binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19","binary_name":"libisccfg140"},{"binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19","binary_name":"liblwres141"},{"binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19","binary_name":"lwresd"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4929-1.json","cves_map":{"cves":[{"severity":[{"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":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2021-25214"},{"severity":[{"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":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2021-25215"},{"severity":[{"type":"CVSS_V3","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":"Ubuntu","score":"medium"}],"id":"CVE-2021-25216"}],"ecosystem":"Ubuntu:16.04:LTS"}}},{"package":{"name":"bind9","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/bind9@1:9.11.3+dfsg-1ubuntu1.15?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.11.3+dfsg-1ubuntu1.15"}]}],"versions":["1:9.10.3.dfsg.P4-12.6ubuntu1","1:9.11.2.P1-1ubuntu2","1:9.11.2.P1-1ubuntu3","1:9.11.2.P1-1ubuntu4","1:9.11.2.P1-1ubuntu5","1:9.11.3+dfsg-1ubuntu1","1:9.11.3+dfsg-1ubuntu1.1","1:9.11.3+dfsg-1ubuntu1.2","1:9.11.3+dfsg-1ubuntu1.3","1:9.11.3+dfsg-1ubuntu1.5","1:9.11.3+dfsg-1ubuntu1.7","1:9.11.3+dfsg-1ubuntu1.8","1:9.11.3+dfsg-1ubuntu1.9","1:9.11.3+dfsg-1ubuntu1.10","1:9.11.3+dfsg-1ubuntu1.11","1:9.11.3+dfsg-1ubuntu1.12","1:9.11.3+dfsg-1ubuntu1.13","1:9.11.3+dfsg-1ubuntu1.14"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1:9.11.3+dfsg-1ubuntu1.15","binary_name":"bind9"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.15","binary_name":"bind9-host"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.15","binary_name":"bind9utils"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.15","binary_name":"dnsutils"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.15","binary_name":"libbind9-160"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.15","binary_name":"libdns-export1100"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.15","binary_name":"libdns1100"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.15","binary_name":"libirs-export160"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.15","binary_name":"libirs160"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.15","binary_name":"libisc-export169"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.15","binary_name":"libisc169"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.15","binary_name":"libisccc-export160"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.15","binary_name":"libisccc160"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.15","binary_name":"libisccfg-export160"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.15","binary_name":"libisccfg160"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.15","binary_name":"liblwres160"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4929-1.json","cves_map":{"cves":[{"severity":[{"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":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2021-25214"},{"severity":[{"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":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2021-25215"},{"severity":[{"type":"CVSS_V3","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":"Ubuntu","score":"medium"}],"id":"CVE-2021-25216"}],"ecosystem":"Ubuntu:18.04:LTS"}}},{"package":{"name":"bind9","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/bind9@1:9.16.1-0ubuntu2.8?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.16.1-0ubuntu2.8"}]}],"versions":["1:9.11.5.P4+dfsg-5.1ubuntu2","1:9.11.5.P4+dfsg-5.1ubuntu3","1:9.11.5.P4+dfsg-5.1ubuntu4","1:9.11.5.P4+dfsg-5.1ubuntu5","1:9.11.14+dfsg-1ubuntu1","1:9.11.14+dfsg-3ubuntu1","1:9.16.0-1ubuntu3","1:9.16.0-1ubuntu4","1:9.16.0-1ubuntu5","1:9.16.1-0ubuntu1","1:9.16.1-0ubuntu2","1:9.16.1-0ubuntu2.1","1:9.16.1-0ubuntu2.2","1:9.16.1-0ubuntu2.3","1:9.16.1-0ubuntu2.4","1:9.16.1-0ubuntu2.6","1:9.16.1-0ubuntu2.7"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1:9.16.1-0ubuntu2.8","binary_name":"bind9"},{"binary_version":"1:9.16.1-0ubuntu2.8","binary_name":"bind9-dnsutils"},{"binary_version":"1:9.16.1-0ubuntu2.8","binary_name":"bind9-host"},{"binary_version":"1:9.16.1-0ubuntu2.8","binary_name":"bind9-libs"},{"binary_version":"1:9.16.1-0ubuntu2.8","binary_name":"bind9-utils"},{"binary_version":"1:9.16.1-0ubuntu2.8","binary_name":"bind9utils"},{"binary_version":"1:9.16.1-0ubuntu2.8","binary_name":"dnsutils"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4929-1.json","cves_map":{"cves":[{"severity":[{"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":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2021-25214"},{"severity":[{"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":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2021-25215"},{"severity":[{"type":"CVSS_V3","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":"Ubuntu","score":"medium"}],"id":"CVE-2021-25216"}],"ecosystem":"Ubuntu:20.04:LTS"}}}],"schema_version":"1.7.5"}