{"id":"USN-6642-1","summary":"bind9 vulnerabilities","details":"Shoham Danino, Anat Bremler-Barr, Yehuda Afek, and Yuval Shavitt discovered\nthat Bind incorrectly handled parsing large DNS messages. A remote attacker\ncould possibly use this issue to cause Bind to consume resources, leading\nto a denial of service. (CVE-2023-4408)\n\nElias 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\nIt was discovered that Bind incorrectly handled reverse zone queries when\nnxdomain-redirect is enabled. A remote attacker could possibly use this\nissue to cause Bind to crash, leading to a denial of service.\n(CVE-2023-5517)\n\nIt was discovered that Bind incorrectly handled certain specific recursive\nquery patterns. A remote attacker could possibly use this issue to cause\nBind to consume memory, leading to a denial of service. (CVE-2023-6516)\n\nBind has been updated to 9.6.48. In addition to security fixes, the updated\npackages contain bug fixes, new features, and possibly incompatible\nchanges.\n\nPlease see the following for more information:\nhttps://downloads.isc.org/isc/bind9/9.16.48/doc/arm/html/notes.html\n","modified":"2026-04-27T17:17:24.433308328Z","published":"2024-02-19T14:00:14Z","related":["UBUNTU-CVE-2023-4408","UBUNTU-CVE-2023-50387","UBUNTU-CVE-2023-50868","UBUNTU-CVE-2023-5517","UBUNTU-CVE-2023-6516"],"upstream":["CVE-2023-4408","CVE-2023-50387","CVE-2023-50868","CVE-2023-5517","CVE-2023-6516","UBUNTU-CVE-2023-4408","UBUNTU-CVE-2023-50387","UBUNTU-CVE-2023-50868","UBUNTU-CVE-2023-5517","UBUNTU-CVE-2023-6516"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6642-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-4408"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-5517"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-6516"},{"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:20.04:LTS","purl":"pkg:deb/ubuntu/bind9@1:9.16.48-0ubuntu0.20.04.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.16.48-0ubuntu0.20.04.1"}]}],"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","1:9.16.1-0ubuntu2.9","1:9.16.1-0ubuntu2.10","1:9.16.1-0ubuntu2.11","1:9.16.1-0ubuntu2.12","1:9.16.1-0ubuntu2.14","1:9.16.1-0ubuntu2.15","1:9.16.1-0ubuntu2.16"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"bind9","binary_version":"1:9.16.48-0ubuntu0.20.04.1"},{"binary_name":"bind9-dnsutils","binary_version":"1:9.16.48-0ubuntu0.20.04.1"},{"binary_name":"bind9-host","binary_version":"1:9.16.48-0ubuntu0.20.04.1"},{"binary_name":"bind9-libs","binary_version":"1:9.16.48-0ubuntu0.20.04.1"},{"binary_name":"bind9-utils","binary_version":"1:9.16.48-0ubuntu0.20.04.1"},{"binary_name":"bind9utils","binary_version":"1:9.16.48-0ubuntu0.20.04.1"},{"binary_name":"dnsutils","binary_version":"1:9.16.48-0ubuntu0.20.04.1"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:20.04:LTS","cves":[{"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":"Ubuntu","score":"medium"}],"id":"CVE-2023-4408"},{"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":"Ubuntu","score":"medium"}],"id":"CVE-2023-5517"},{"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":"Ubuntu","score":"medium"}],"id":"CVE-2023-6516"},{"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-2023-50387"},{"severity":[{"type":"CVSS_V3","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":"Ubuntu","score":"medium"}],"id":"CVE-2023-50868"}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6642-1.json"}}],"schema_version":"1.7.5"}