{"id":"CVE-2021-43612","aliases":["ALPINE-CVE-2021-43612","ALSA-2024:9158","CLSA-2025-1758823952","DEBIAN-CVE-2021-43612","DLA-3389-1","EUVD-2021-30526","GHSA-x6gw-c547-cwm7","RHSA-2024:9158","RLSA-2024:9158","UBUNTU-CVE-2021-43612","openSUSE-SU-2024:11635-1"],"status":"published","title":"In lldpd before 1.0.13, when decoding SONMP packets in the sonmp_decode function, it's possible...","description":"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 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Party Advisory","fix"]},{"url":"https://github.com/lldpd/lldpd/commit/73d42680fce8598324364dbb31b9bc3b8320adf7","tags":["x_transferred","Patch","fix"]},{"url":"https://github.com/lldpd/lldpd/compare/1.0.12...1.0.13","tags":["x_transferred","Patch","Release Notes","fix"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JYA4AMJXCNF6UPFG36L2TPPT32C242SP/","tags":["vendor-advisory","x_transferred","web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3T5XHPOGIPWCRRPJUE6P3HVC5PTSD5JS/","tags":["vendor-advisory","x_transferred","web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SKQWHG2SZJZSGC7PXVDAEJYBN7ESDR7D/","tags":["vendor-advisory","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-43612","tags":["advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3T5XHPOGIPWCRRPJUE6P3HVC5PTSD5JS"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JYA4AMJXCNF6UPFG36L2TPPT32C242SP"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SKQWHG2SZJZSGC7PXVDAEJYBN7ESDR7D"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3T5XHPOGIPWCRRPJUE6P3HVC5PTSD5JS"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JYA4AMJXCNF6UPFG36L2TPPT32C242SP"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SKQWHG2SZJZSGC7PXVDAEJYBN7ESDR7D"},{"url":"https://github.com/advisories/GHSA-x6gw-c547-cwm7"},{"url":"https://security.alpinelinux.org/vuln/CVE-2021-43612","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2024:9158","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2020-27827","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2021-43612","tags":["report"]},{"url":"https://access.redhat.com/security/cve/CVE-2023-41910","tags":["report"]},{"url":"https://bugzilla.redhat.com/1921438","tags":["report"]},{"url":"https://bugzilla.redhat.com/2040388","tags":["report"]},{"url":"https://bugzilla.redhat.com/2237411","tags":["report"]},{"url":"https://errata.almalinux.org/9/ALSA-2024-9158.html","tags":["advisory"]},{"url":"https://errata.tuxcare.com/els_os/almalinux9.2esu/CLSA-2025-1758823952.html","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-43612","tags":["advisory"]},{"url":"https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/9/html/9.5_release_notes/index","tags":["article"]},{"url":"https://access.redhat.com/security/updates/classification/#moderate","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1921438","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2040388","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2237411","tags":["report"]},{"url":"https://issues.redhat.com/browse/RHEL-22127","tags":["article"]},{"url":"https://issues.redhat.com/browse/RHEL-25990","tags":["article"]},{"url":"https://issues.redhat.com/browse/RHEL-5787","tags":["article"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2024/rhsa-2024_9158.json","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-27827","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-27827","tags":["advisory"]},{"url":"https://mail.openvswitch.org/pipermail/ovs-dev/2021-January/379471.html","tags":["article"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-43612","tags":["advisory","report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-41910","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-41910","tags":["advisory"]},{"url":"https://errata.rockylinux.org/RLSA-2024:9158","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-43612","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2021-43612","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2021-43612","description":"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.","status":"published","published":"2023-04-15T00:00:00Z","modified":"2025-02-13T16:28:43.689Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:32:56.689433Z"}],"euvd":[{"id":"EUVD-2021-30526","description":"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.","status":"published","published":"2023-04-15T00:00:00Z","modified":"2025-02-13T16:28:43Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-03T00:03:52.752782Z"}],"ghsa":[{"id":"GHSA-x6gw-c547-cwm7","title":"In lldpd before 1.0.13, when decoding SONMP packets in the sonmp_decode function, it's possible...","description":"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.","status":"published","published":"2023-04-16T00:30:25Z","modified":"2024-04-04T03:30:14Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:56:15.423381Z"}],"nvd":[{"id":"CVE-2021-43612","description":"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.","status":"published","published":"2023-04-15T22:15:07.033Z","modified":"2026-06-17T04:11:11.71Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:07:07.764332Z"}],"osv":[{"id":"ALPINE-CVE-2021-43612","description":"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.","status":"published","published":"2023-04-15T22:15:07.033Z","modified":"2026-11-03T06:32:41.551011477Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-03T07:17:02.90744Z"},{"id":"CVE-2021-43612","description":"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.","status":"published","published":"2023-04-15T22:15:07.033Z","modified":"2026-10-20T14:34:28.184880311Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:21.877444Z"},{"id":"DEBIAN-CVE-2021-43612","description":"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.","status":"published","published":"2023-04-15T22:15:07.033Z","modified":"2026-10-23T18:04:16.425697353Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:35.799676Z"},{"id":"RHSA-2024:9158","title":"Red Hat Security Advisory: lldpd security update","status":"published","published":"2024-11-15T07:39:57Z","modified":"2026-08-07T10:16:34Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:14.610978Z"},{"id":"UBUNTU-CVE-2021-43612","description":"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.","status":"published","published":"2023-04-15T22:15:00Z","modified":"2026-10-21T10:15:35.205478328Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:29.220315Z"},{"id":"ALSA-2024:9158","title":"Moderate: lldpd security update","description":"LLDP is an industry standard protocol designed to supplant proprietary Link-Layer protocols such as EDP or CDP. The goal of LLDP is to provide an inter-vendor compatible mechanism to deliver Link-Layer notifications to adjacent network devices.  \n\nSecurity Fix(es):  \n\n  * lldp/openvswitch: denial of service via externally triggered memory leak (CVE-2020-27827)\n  * lldpd: out-of-bounds read when decoding SONMP packets (CVE-2021-43612)\n  * lldpd: CDP PDU Packet cdp.c out-of-bounds read (CVE-2023-41910)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.  \n\nAdditional Changes:  \n\nFor detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.\n","status":"published","published":"2024-11-12T00:00:00Z","modified":"2026-10-29T11:31:51.958917501Z","updated_at":"2026-11-02T15:27:53.030731Z"},{"id":"CLSA-2025-1758823952","title":"lldpd: Fix of CVE-2021-43612","description":"- CVE-2021-43612: fix out-of-bounds heap read in sonmp_decode function","status":"published","published":"2025-09-25T18:12:38Z","modified":"2026-06-01T00:31:00.363454429Z","updated_at":"2026-11-02T15:43:42.427288Z"},{"id":"DLA-3389-1","title":"lldpd - security update","status":"published","published":"2023-04-10T00:00:00Z","modified":"2026-03-09T01:22:53.970132Z","updated_at":"2026-11-02T15:46:11.734021Z"},{"id":"openSUSE-SU-2024:11635-1","title":"liblldpctl4-1.0.13-1.1 on GA media","description":"These are all security issues fixed in the liblldpctl4-1.0.13-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T02:25:21.925665Z","updated_at":"2026-11-02T16:58:35.195147Z"},{"id":"RLSA-2024:9158","title":"Moderate: lldpd security update","description":"LLDP is an industry standard protocol designed to supplant proprietary Link-Layer protocols such as EDP or CDP. The goal of LLDP is to provide an inter-vendor compatible mechanism to deliver Link-Layer notifications to adjacent network devices.\n\nSecurity Fix(es):\n\n* lldp/openvswitch: denial of service via externally triggered memory leak (CVE-2020-27827)\n\n* lldpd: out-of-bounds read when decoding SONMP packets (CVE-2021-43612)\n\n* lldpd: CDP PDU Packet cdp.c out-of-bounds read (CVE-2023-41910)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\nAdditional Changes:\n\nFor detailed information on changes in this release, see the Rocky Linux 9.5 Release Notes linked from the References section.","status":"published","published":"2025-03-17T20:16:49.937392Z","modified":"2026-02-05T07:30:11.672413Z","updated_at":"2026-11-02T15:53:24.923365Z"}]}}