{"id":"CVE-2020-28349","details":"An inaccurate frame deduplication process in ChirpStack Network Server 3.9.0 allows a malicious gateway to perform uplink Denial of Service via malformed frequency attributes in CollectAndCallOnceCollect in internal/uplink/collect.go. NOTE: the vendor's position is that there are no \"guarantees that allowing untrusted LoRa gateways to the network should still result in a secure network.","modified":"2026-07-08T20:30:17.985229Z","published":"2020-11-09T01:15:13.710Z","references":[{"type":"FIX","url":"https://github.com/brocaar/chirpstack-network-server/commit/874fc1a9b01045ebe8a340f0bb01ed19e8256e60"},{"type":"FIX","url":"https://github.com/brocaar/chirpstack-network-server/commit/f996bb0c6c85281b5658f59ff09db1b4a73db453"},{"type":"EVIDENCE","url":"https://www.cyberark.com/resources/threat-research-blog/lorawan-mqtt-what-to-know-when-securing-your-iot-network"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/brocaar/chirpstack-network-server","events":[{"introduced":"cabb6b49230f2f3ff25cbc14a992191004c05fad"},{"last_affected":"cabb6b49230f2f3ff25cbc14a992191004c05fad"},{"fixed":"874fc1a9b01045ebe8a340f0bb01ed19e8256e60"},{"fixed":"f996bb0c6c85281b5658f59ff09db1b4a73db453"}],"database_specific":{"cpe":"cpe:2.3:a:chirpstack:network_server:3.9.0:*:*:*:*:*:*:*","extracted_events":[{"introduced":"3.9.0"},{"last_affected":"3.9.0"}],"source":["CPE_STRING","REFERENCES"]}}],"versions":["3.9.0","v3.10.0","v3.10.0-test.3","v3.10.0-test.2","v3.10.0-test.1","v3.9.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-28349.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}