{"id":"USN-5126-1","summary":"bind9 vulnerability","details":"Kishore Kumar Kothapalli discovered that Bind incorrectly handled the lame\ncache when processing responses. A remote attacker could possibly use this\nissue to cause Bind to consume resources, resulting in a denial of service.\n","modified":"2026-02-10T04:42:22Z","published":"2021-10-28T10:52:18Z","related":["UBUNTU-CVE-2021-25219"],"upstream":["CVE-2021-25219","UBUNTU-CVE-2021-25219"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5126-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-25219"}],"affected":[{"package":{"name":"bind9","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/bind9@1:9.11.3+dfsg-1ubuntu1.16?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.11.3+dfsg-1ubuntu1.16"}]}],"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","1:9.11.3+dfsg-1ubuntu1.15"],"ecosystem_specific":{"binaries":[{"binary_version":"1:9.11.3+dfsg-1ubuntu1.16","binary_name":"bind9"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.16","binary_name":"bind9-host"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.16","binary_name":"bind9utils"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.16","binary_name":"dnsutils"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.16","binary_name":"libbind-dev"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.16","binary_name":"libbind-export-dev"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.16","binary_name":"libbind9-160"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.16","binary_name":"libdns-export1100"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.16","binary_name":"libdns1100"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.16","binary_name":"libirs-export160"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.16","binary_name":"libirs160"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.16","binary_name":"libisc-export169"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.16","binary_name":"libisc169"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.16","binary_name":"libisccc-export160"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.16","binary_name":"libisccc160"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.16","binary_name":"libisccfg-export160"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.16","binary_name":"libisccfg160"},{"binary_version":"1:9.11.3+dfsg-1ubuntu1.16","binary_name":"liblwres160"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5126-1.json","cves_map":{"cves":[{"id":"CVE-2021-25219","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:18.04:LTS"}}},{"package":{"name":"bind9","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/bind9@1:9.16.1-0ubuntu2.9?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.16.1-0ubuntu2.9"}]}],"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","1:9.16.1-0ubuntu2.8"],"ecosystem_specific":{"binaries":[{"binary_version":"1:9.16.1-0ubuntu2.9","binary_name":"bind9"},{"binary_version":"1:9.16.1-0ubuntu2.9","binary_name":"bind9-dnsutils"},{"binary_version":"1:9.16.1-0ubuntu2.9","binary_name":"bind9-host"},{"binary_version":"1:9.16.1-0ubuntu2.9","binary_name":"bind9-libs"},{"binary_version":"1:9.16.1-0ubuntu2.9","binary_name":"bind9-utils"},{"binary_version":"1:9.16.1-0ubuntu2.9","binary_name":"bind9utils"},{"binary_version":"1:9.16.1-0ubuntu2.9","binary_name":"dnsutils"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5126-1.json","cves_map":{"cves":[{"id":"CVE-2021-25219","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:20.04:LTS"}}}],"schema_version":"1.7.3"}