{"id":"UBUNTU-CVE-2021-43612","details":"In lldpd before 1.0.13, when decoding SONMP packets in the sonmp_decode function, it's possible to trigger an out-of-bounds heap read via short SONMP packets.","modified":"2026-05-20T16:05:19.002040476Z","published":"2023-04-15T22:15:00Z","upstream":["CVE-2021-43612"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-43612"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-43612"}],"affected":[{"package":{"name":"lldpd","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/lldpd?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.7.16-1","0.7.19-1"],"ecosystem_specific":{"binaries":[{"binary_name":"lldpd","binary_version":"0.7.19-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-43612.json"}},{"package":{"name":"lldpd","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/lldpd?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.8-1","0.9.9-1","0.9.9-1ubuntu0.1"],"ecosystem_specific":{"binaries":[{"binary_name":"lldpd","binary_version":"0.9.9-1ubuntu0.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-43612.json"}},{"package":{"name":"lldpd","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/lldpd?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.4-1","1.0.4-1build1","1.0.4-1build2"],"ecosystem_specific":{"binaries":[{"binary_name":"lldpd","binary_version":"1.0.4-1build2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-43612.json"}},{"package":{"name":"lldpd","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/lldpd?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.11-1","1.0.12-1","1.0.13-1"],"ecosystem_specific":{"binaries":[{"binary_name":"lldpd","binary_version":"1.0.13-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-43612.json"}},{"package":{"name":"lldpd","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/lldpd?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.17-1","1.0.18-1","1.0.18-1build1","1.0.18-1build3"],"ecosystem_specific":{"binaries":[{"binary_name":"lldpd","binary_version":"1.0.18-1build3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-43612.json"}},{"package":{"name":"lldpd","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/lldpd?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.18-1build3","1.0.18-1build4"],"ecosystem_specific":{"binaries":[{"binary_name":"lldpd","binary_version":"1.0.18-1build4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-43612.json"}},{"package":{"name":"lldpd","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/lldpd?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.18-1build4","1.0.19-1"],"ecosystem_specific":{"binaries":[{"binary_name":"lldpd","binary_version":"1.0.19-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-43612.json"}}],"schema_version":"1.7.5","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"}]}