{"id":"CVE-2020-13849","aliases":["EUVD-2020-6060","GHSA-cx2v-x9qw-9rgc","openSUSE-SU-2024:11575-1"],"status":"published","title":"The MQTT protocol 3.1.1 requires a server to set a timeout value of 1.5 times the Keep-Alive...","description":"The MQTT protocol 3.1.1 requires a server to set a timeout value of 1.5 times the Keep-Alive value specified by a client, which allows remote attackers to cause a denial of service (loss of the ability to establish new connections), as demonstrated by SlowITe.","severity":{"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","from":"nvd"},"epss":{"day":"2026-11-09","score":0.02051,"percentile":0.81384,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-400"],"published":"2020-06-04T20:16:26Z","modified":"2026-06-17T02:53:46Z","products":[{"vendor":"mqtt","product":"mqtt"}],"references":[{"url":"https://www.mdpi.com/1424-8220/20/10/2932","tags":["x_refsource_MISC","x_transferred","Technical Description","Third Party Advisory"]},{"url":"https://doi.org/10.3390/s20102932","tags":["x_refsource_MISC","x_transferred","Technical Description","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-13849"},{"url":"https://github.com/advisories/GHSA-cx2v-x9qw-9rgc"},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2020-13849","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-34434","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2020-13849","description":"The MQTT protocol 3.1.1 requires a server to set a timeout value of 1.5 times the Keep-Alive value specified by a client, which allows remote attackers to cause a denial of service (loss of the ability to establish new connections), as demonstrated by SlowITe.","status":"published","published":"2020-06-04T20:16:26Z","modified":"2024-08-04T12:32:13.091Z","updated_at":"2026-11-02T14:35:54.170199Z"}],"euvd":[{"id":"EUVD-2020-6060","description":"The MQTT protocol 3.1.1 requires a server to set a timeout value of 1.5 times the Keep-Alive value specified by a client, which allows remote attackers to cause a denial of service (loss of the ability to establish new connections), as demonstrated by SlowITe.","status":"published","published":"2020-06-04T20:16:26Z","modified":"2024-08-04T12:32:13Z","updated_at":"2026-11-03T03:07:36.182524Z"}],"ghsa":[{"id":"GHSA-cx2v-x9qw-9rgc","title":"The MQTT protocol 3.1.1 requires a server to set a timeout value of 1.5 times the Keep-Alive...","description":"The MQTT protocol 3.1.1 requires a server to set a timeout value of 1.5 times the Keep-Alive value specified by a client, which allows remote attackers to cause a denial of service (loss of the ability to establish new connections), as demonstrated by SlowITe.","status":"published","published":"2022-05-24T17:19:21Z","modified":"2023-01-29T05:02:51Z","updated_at":"2026-11-02T14:45:10.945052Z"}],"nvd":[{"id":"CVE-2020-13849","description":"The MQTT protocol 3.1.1 requires a server to set a timeout value of 1.5 times the Keep-Alive value specified by a client, which allows remote attackers to cause a denial of service (loss of the ability to establish new connections), as demonstrated by SlowITe.","status":"published","published":"2020-06-04T21:15:11.547Z","modified":"2026-06-17T02:53:46.48Z","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":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:06:05.962132Z"}],"osv":[{"id":"openSUSE-SU-2024:11575-1","title":"libmosquitto1-2.0.12-1.1 on GA media","description":"These are all security issues fixed in the libmosquitto1-2.0.12-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T03:25:40.712752Z","updated_at":"2026-11-02T16:58:35.195147Z"}]}}