{"id":"USN-5126-2","summary":"bind9 vulnerability","details":"USN-5126-1 fixed a vulnerability in Bind. This update provides\nthe corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.\n\nOriginal advisory details:\n\n Kishore Kumar Kothapalli discovered that Bind incorrectly handled the lame\n cache when processing responses. A remote attacker could possibly use this\n issue to cause Bind to consume resources, resulting in a denial of service.\n","modified":"2026-02-10T04:42:22Z","published":"2021-10-28T18:25:41Z","related":["UBUNTU-CVE-2021-25219"],"upstream":["CVE-2021-25219","UBUNTU-CVE-2021-25219"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5126-2"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-25219"}],"affected":[{"package":{"name":"bind9","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/bind9@1:9.9.5.dfsg-3ubuntu0.19+esm5?arch=source&distro=trusty/esm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.9.5.dfsg-3ubuntu0.19+esm5"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_name":"bind9","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm5"},{"binary_name":"bind9-host","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm5"},{"binary_name":"bind9utils","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm5"},{"binary_name":"dnsutils","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm5"},{"binary_name":"host","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm5"},{"binary_name":"libbind-dev","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm5"},{"binary_name":"libbind9-90","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm5"},{"binary_name":"libdns100","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm5"},{"binary_name":"libisc95","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm5"},{"binary_name":"libisccc90","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm5"},{"binary_name":"libisccfg90","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm5"},{"binary_name":"liblwres90","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm5"},{"binary_name":"lwresd","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm5"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5126-2.json","cves_map":{"cves":[{"id":"CVE-2021-25219","severity":[{"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":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:Pro:14.04:LTS"}}},{"package":{"name":"bind9","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/bind9@1:9.10.3.dfsg.P4-8ubuntu1.19+esm1?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm1"}]}],"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","1:9.10.3.dfsg.P4-8ubuntu1.19"],"ecosystem_specific":{"binaries":[{"binary_name":"bind9","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm1"},{"binary_name":"bind9-host","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm1"},{"binary_name":"bind9utils","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm1"},{"binary_name":"dnsutils","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm1"},{"binary_name":"host","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm1"},{"binary_name":"libbind-dev","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm1"},{"binary_name":"libbind-export-dev","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm1"},{"binary_name":"libbind9-140","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm1"},{"binary_name":"libdns-export162","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm1"},{"binary_name":"libdns162","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm1"},{"binary_name":"libirs-export141","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm1"},{"binary_name":"libirs141","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm1"},{"binary_name":"libisc-export160","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm1"},{"binary_name":"libisc160","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm1"},{"binary_name":"libisccc-export140","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm1"},{"binary_name":"libisccc140","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm1"},{"binary_name":"libisccfg-export140","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm1"},{"binary_name":"libisccfg140","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm1"},{"binary_name":"liblwres141","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm1"},{"binary_name":"lwresd","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm1"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5126-2.json","cves_map":{"cves":[{"id":"CVE-2021-25219","severity":[{"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":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:Pro:16.04:LTS"}}}],"schema_version":"1.7.3"}