{"id":"USN-6723-1","summary":"bind9 vulnerabilities","details":"Elias Heftrig, Haya Schulmann, Niklas Vogel, and Michael Waidner discovered\nthat Bind icorrectly handled validating DNSSEC messages. A remote attacker\ncould possibly use this issue to cause Bind to consume resources, leading\nto a denial of service. (CVE-2023-50387)\n\nIt was discovered that Bind incorrectly handled preparing an NSEC3 closest\nencloser proof. A remote attacker could possibly use this issue to cause\nBind to consume resources, leading to a denial of service. (CVE-2023-50868)\n","modified":"2026-04-27T17:06:05.913883Z","published":"2024-04-09T12:07:28Z","related":["UBUNTU-CVE-2023-50387","UBUNTU-CVE-2023-50868"],"upstream":["CVE-2023-50387","CVE-2023-50868","UBUNTU-CVE-2023-50387","UBUNTU-CVE-2023-50868"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6723-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-50387"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-50868"}],"affected":[{"package":{"name":"bind9","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/bind9@1:9.9.5.dfsg-3ubuntu0.19+esm12?arch=source&distro=trusty/esm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.9.5.dfsg-3ubuntu0.19+esm12"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_name":"bind9","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm12"},{"binary_name":"bind9-host","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm12"},{"binary_name":"bind9utils","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm12"},{"binary_name":"dnsutils","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm12"},{"binary_name":"host","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm12"},{"binary_name":"libbind9-90","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm12"},{"binary_name":"libdns100","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm12"},{"binary_name":"libisc95","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm12"},{"binary_name":"libisccc90","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm12"},{"binary_name":"libisccfg90","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm12"},{"binary_name":"liblwres90","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm12"},{"binary_name":"lwresd","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm12"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2023-50387","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-2023-50868","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","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"}]}],"ecosystem":"Ubuntu:Pro:14.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6723-1.json"}},{"package":{"name":"bind9","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/bind9@1:9.10.3.dfsg.P4-8ubuntu1.19+esm8?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm8"}]}],"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","1:9.10.3.dfsg.P4-8ubuntu1.19+esm1","1:9.10.3.dfsg.P4-8ubuntu1.19+esm2","1:9.10.3.dfsg.P4-8ubuntu1.19+esm3","1:9.10.3.dfsg.P4-8ubuntu1.19+esm5","1:9.10.3.dfsg.P4-8ubuntu1.19+esm6","1:9.10.3.dfsg.P4-8ubuntu1.19+esm7"],"ecosystem_specific":{"binaries":[{"binary_name":"bind9","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm8"},{"binary_name":"bind9-host","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm8"},{"binary_name":"bind9utils","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm8"},{"binary_name":"dnsutils","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm8"},{"binary_name":"host","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm8"},{"binary_name":"libbind9-140","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm8"},{"binary_name":"libdns-export162","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm8"},{"binary_name":"libdns162","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm8"},{"binary_name":"libirs-export141","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm8"},{"binary_name":"libirs141","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm8"},{"binary_name":"libisc-export160","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm8"},{"binary_name":"libisc160","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm8"},{"binary_name":"libisccc-export140","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm8"},{"binary_name":"libisccc140","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm8"},{"binary_name":"libisccfg-export140","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm8"},{"binary_name":"libisccfg140","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm8"},{"binary_name":"liblwres141","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm8"},{"binary_name":"lwresd","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm8"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2023-50387","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-2023-50868","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","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"}]}],"ecosystem":"Ubuntu:Pro:16.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6723-1.json"}},{"package":{"name":"bind9","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/bind9@1:9.11.3+dfsg-1ubuntu1.19+esm3?arch=source&distro=esm-infra/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.11.3+dfsg-1ubuntu1.19+esm3"}]}],"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","1:9.11.3+dfsg-1ubuntu1.16","1:9.11.3+dfsg-1ubuntu1.17","1:9.11.3+dfsg-1ubuntu1.18","1:9.11.3+dfsg-1ubuntu1.19+esm1","1:9.11.3+dfsg-1ubuntu1.19+esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"bind9","binary_version":"1:9.11.3+dfsg-1ubuntu1.19+esm3"},{"binary_name":"bind9-host","binary_version":"1:9.11.3+dfsg-1ubuntu1.19+esm3"},{"binary_name":"bind9utils","binary_version":"1:9.11.3+dfsg-1ubuntu1.19+esm3"},{"binary_name":"dnsutils","binary_version":"1:9.11.3+dfsg-1ubuntu1.19+esm3"},{"binary_name":"libbind9-160","binary_version":"1:9.11.3+dfsg-1ubuntu1.19+esm3"},{"binary_name":"libdns-export1100","binary_version":"1:9.11.3+dfsg-1ubuntu1.19+esm3"},{"binary_name":"libdns1100","binary_version":"1:9.11.3+dfsg-1ubuntu1.19+esm3"},{"binary_name":"libirs-export160","binary_version":"1:9.11.3+dfsg-1ubuntu1.19+esm3"},{"binary_name":"libirs160","binary_version":"1:9.11.3+dfsg-1ubuntu1.19+esm3"},{"binary_name":"libisc-export169","binary_version":"1:9.11.3+dfsg-1ubuntu1.19+esm3"},{"binary_name":"libisc169","binary_version":"1:9.11.3+dfsg-1ubuntu1.19+esm3"},{"binary_name":"libisccc-export160","binary_version":"1:9.11.3+dfsg-1ubuntu1.19+esm3"},{"binary_name":"libisccc160","binary_version":"1:9.11.3+dfsg-1ubuntu1.19+esm3"},{"binary_name":"libisccfg-export160","binary_version":"1:9.11.3+dfsg-1ubuntu1.19+esm3"},{"binary_name":"libisccfg160","binary_version":"1:9.11.3+dfsg-1ubuntu1.19+esm3"},{"binary_name":"liblwres160","binary_version":"1:9.11.3+dfsg-1ubuntu1.19+esm3"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2023-50387","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-2023-50868","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","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"}]}],"ecosystem":"Ubuntu:Pro:18.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6723-1.json"}}],"schema_version":"1.7.5"}