{"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":"2026-04-10T04:25:56.205007Z","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":"0"},{"last_affected":"cabb6b49230f2f3ff25cbc14a992191004c05fad"},{"fixed":"874fc1a9b01045ebe8a340f0bb01ed19e8256e60"},{"fixed":"f996bb0c6c85281b5658f59ff09db1b4a73db453"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"3.9.0"}]}}],"versions":["0.1.0","0.10.0","0.10.1","0.11.0","0.12.0","0.12.1","0.12.2","0.12.3","0.12.4","0.12.5","0.13.0","0.13.1","0.13.2","0.13.3","0.14.0","0.14.1","0.15.0","0.15.1","0.16.0","0.16.1","0.17.0","0.17.1","0.17.2","0.18.0","0.19.0","0.19.1","0.19.2","0.2.0","0.2.1","0.20.0","0.20.1","0.21.0","0.22.0","0.22.1","0.23.0","0.23.1","0.23.2","0.23.3","0.24.0","0.24.1","0.24.2","0.24.3","0.25.0","0.25.1","0.26.0","0.26.1","0.26.2","0.26.3","0.3.0","0.3.1","0.4.0","0.4.1","0.5.0","0.5.1","0.6.0","0.6.1","0.7.0","0.8.0","0.8.1","0.8.2","0.9.0","0.9.1","0.9.2","v1.0.0","v1.0.1","v2.0.0","v2.0.0-alpha.1","v2.0.0-test.1","v2.0.1","v2.0.2","v2.1.0","v2.2.0","v2.3.0","v2.4.0","v2.4.1","v2.5.0","v2.6.0","v2.6.0-test1","v2.6.1","v2.7.0","v2.8.0","v3.0.0","v3.0.0-test.1","v3.0.0-test.2","v3.0.0-test.3","v3.0.1","v3.0.2","v3.0.2-test.1","v3.1.0","v3.10.0","v3.10.0-test.1","v3.10.0-test.2","v3.10.0-test.3","v3.2.0","v3.2.1","v3.2.1-test.1","v3.3.0","v3.3.0-test.1","v3.3.0-test.2","v3.4.0","v3.4.1","v3.5.0","v3.5.0-test.1","v3.6.0","v3.7.0","v3.7.0-test.1","v3.8.0","v3.8.1","v3.9.0","v3.9.0-test.1"],"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"}]}