{"id":"UBUNTU-CVE-2023-38406","details":"bgpd/bgp_flowspec.c in FRRouting (FRR) before 8.4.3 mishandles an nlri length of zero, aka a \"flowspec overflow.\"","modified":"2026-02-04T03:31:40.164910Z","published":"2023-11-06T06:15:00Z","related":["USN-6498-1","USN-6807-1"],"upstream":["CVE-2023-38406"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-38406"},{"type":"REPORT","url":"https://github.com/FRRouting/frr/compare/frr-8.4.2...frr-8.4.3"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6498-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2023-38406"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6807-1"}],"affected":[{"package":{"name":"frr","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/frr@7.2.1-1ubuntu0.2+esm2?arch=source&distro=esm-apps/focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.2.1-1ubuntu0.2+esm2"}]}],"versions":["6.0.2-2build2","7.2-1ubuntu1","7.2-1ubuntu2","7.2.1-1","7.2.1-1ubuntu0.1","7.2.1-1ubuntu0.2","7.2.1-1ubuntu0.2+esm1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"frr","binary_version":"7.2.1-1ubuntu0.2+esm2"},{"binary_name":"frr-pythontools","binary_version":"7.2.1-1ubuntu0.2+esm2"},{"binary_name":"frr-rpki-rtrlib","binary_version":"7.2.1-1ubuntu0.2+esm2"},{"binary_version":"7.2.1-1ubuntu0.2+esm2","binary_name":"frr-snmp"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-38406.json"}},{"package":{"name":"frr","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/frr@8.1-1ubuntu1.8?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.1-1ubuntu1.8"}]}],"versions":["7.5.1-1.1","8.1-1","8.1-1ubuntu1","8.1-1ubuntu1.1","8.1-1ubuntu1.2","8.1-1ubuntu1.3","8.1-1ubuntu1.4","8.1-1ubuntu1.5","8.1-1ubuntu1.6","8.1-1ubuntu1.7"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"frr","binary_version":"8.1-1ubuntu1.8"},{"binary_name":"frr-pythontools","binary_version":"8.1-1ubuntu1.8"},{"binary_version":"8.1-1ubuntu1.8","binary_name":"frr-rpki-rtrlib"},{"binary_version":"8.1-1ubuntu1.8","binary_name":"frr-snmp"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2023/UBUNTU-CVE-2023-38406.json"}}],"schema_version":"1.7.3","severity":[{"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"}]}