{"id":"CVE-2021-38425","aliases":["DEBIAN-CVE-2021-38425","EUVD-2021-24877","GHSA-6x94-8g2r-qg72","UBUNTU-CVE-2021-38425","USN-6306-1"],"status":"published","title":"eProsima Fast DDS Network Amplification","description":"eProsima Fast DDS versions prior to 2.4.0 (#2269) are susceptible to exploitation when an attacker sends a specially crafted packet to flood a target device with unwanted traffic, which may result in a denial-of-service condition and information exposure.","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":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.05022,"percentile":0.92365,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-406"],"published":"2022-05-05T15:24:24Z","modified":"2026-10-23T18:05:22Z","fixes":[{"ecosystem":"Debian:12","package":"fastdds","fixed_in":["2.6.1+ds-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"fastdds","fixed_in":["2.6.1+ds-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:22.04:LTS","package":"fastdds","fixed_in":["2.5.0+ds-3ubuntu0.1~esm1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"fastdds","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.1+ds-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"fastdds","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.1+ds-1"}]}]},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"fastdds","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.5.0+ds-3ubuntu0.1~esm1"}]}],"versions":["2.1.0+ds-9","2.4.1+ds-1","2.5.0+ds-3"]},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"fastdds","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.5.0+ds-3ubuntu0.1~esm1"}]}],"versions":["2.1.0+ds-9","2.4.1+ds-1","2.5.0+ds-3"],"bundled":7}],"products":[{"vendor":"eprosima","product":"fast dds"},{"vendor":"eprosima","product":"fast_dds"}],"references":[{"url":"https://www.cisa.gov/uscert/ics/advisories/icsa-21-315-02","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","US Government Resource","advisory","report"]},{"url":"https://github.com/eProsima/Fast-DDS","tags":["x_refsource_CONFIRM","x_transferred","Product","Third Party Advisory","package"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-38425"},{"url":"https://github.com/advisories/GHSA-6x94-8g2r-qg72"},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-38425","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-38425","tags":["report"]},{"url":"https://github.com/eProsima/Fast-DDS/issues/2267","tags":["report"]},{"url":"https://github.com/eProsima/Fast-DDS/pull/2269","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-6306-1","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-38425","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2023-39534","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2023-39945","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2023-39946","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2023-39947","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2023-39948","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2023-39949","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-38425","title":"eProsima Fast DDS Network Amplification","description":"eProsima Fast DDS versions prior to 2.4.0 (#2269) are susceptible to exploitation when an attacker sends a specially crafted packet to flood a target device with unwanted traffic, which may result in a denial-of-service condition and information exposure.","status":"published","published":"2022-05-05T15:24:24Z","modified":"2025-04-16T16:23:11.495Z","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":"cna"}],"cwes":["CWE-406"],"updated_at":"2026-11-02T14:33:07.349244Z"}],"euvd":[{"id":"EUVD-2021-24877","description":"eProsima Fast DDS versions prior to 2.4.0 (#2269) are susceptible to exploitation when an attacker sends a specially crafted packet to flood a target device with unwanted traffic, which may result in a denial-of-service condition and information exposure.","status":"published","published":"2022-05-05T15:24:24Z","modified":"2025-04-16T16:23:11Z","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":"2026-11-02T20:52:24.329168Z"}],"ghsa":[{"id":"GHSA-6x94-8g2r-qg72","title":"eProsima Fast DDS versions prior to 2.4.0 (#2269) are susceptible to exploitation when an...","description":"eProsima Fast DDS versions prior to 2.4.0 (#2269) are susceptible to exploitation when an attacker sends a specially crafted packet to flood a target device with unwanted traffic, which may result in a denial-of-service condition and information exposure.","status":"published","published":"2022-05-06T00:00:47Z","modified":"2023-02-01T05:02:04Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"cwes":["CWE-406"],"updated_at":"2026-11-02T14:49:50.068333Z"}],"nvd":[{"id":"CVE-2021-38425","description":"eProsima Fast DDS versions prior to 2.4.0 (#2269) are susceptible to exploitation when an attacker sends a specially crafted packet to flood a target device with unwanted traffic, which may result in a denial-of-service condition and information exposure.","status":"published","published":"2022-05-05T17:15:09.06Z","modified":"2026-06-17T04:02:04.453Z","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":"secondary"},{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":6.4,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-406"],"updated_at":"2026-11-02T14:07:06.029737Z"}],"osv":[{"id":"CVE-2021-38425","description":"eProsima Fast DDS versions prior to 2.4.0 (#2269) are susceptible to exploitation when an attacker sends a specially crafted packet to flood a target device with unwanted traffic, which may result in a denial-of-service condition and information exposure.","status":"published","published":"2022-05-05T17:15:09.06Z","modified":"2026-10-20T10:53:52.587688892Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:20.843843Z"},{"id":"DEBIAN-CVE-2021-38425","description":"eProsima Fast DDS versions prior to 2.4.0 (#2269) are susceptible to exploitation when an attacker sends a specially crafted packet to flood a target device with unwanted traffic, which may result in a denial-of-service condition and information exposure.","status":"published","published":"2022-05-05T17:15:09.06Z","modified":"2026-10-23T18:05:22.97137273Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"updated_at":"2026-11-02T15:45:35.521549Z"},{"id":"UBUNTU-CVE-2021-38425","description":"eProsima Fast DDS versions prior to 2.4.0 (#2269) are susceptible to exploitation when an attacker sends a specially crafted packet to flood a target device with unwanted traffic, which may result in a denial-of-service condition and information exposure.","status":"published","published":"2022-05-05T17:15:00Z","modified":"2026-04-22T12:59:22.958548Z","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":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"updated_at":"2026-11-02T15:54:28.526929Z"},{"id":"USN-6306-1","title":"fastdds vulnerabilities","description":"It was discovered that Fast DDS incorrectly handled certain inputs.\nA remote attacker could possibly use this issue to cause a denial of\nservice and information exposure. This issue only affected Ubuntu\n22.04 LTS. (CVE-2021-38425)\n\nIt was discovered that Fast DDS incorrectly handled certain inputs.\nAn attacker could possibly use this issue to cause a crash.\n(CVE-2023-39534, CVE-2023-39945, CVE-2023-39946, CVE-2023-39947,\nCVE-2023-39948, CVE-2023-39949)\n","status":"published","published":"2023-08-24T17:34:36Z","modified":"2026-04-27T16:48:01.28927Z","updated_at":"2026-11-02T16:58:17.305935Z"}]}}