{"id":"CVE-2020-18976","aliases":["DEBIAN-CVE-2020-18976","EUVD-2020-10887","GHSA-v6p2-879w-fx47","UBUNTU-CVE-2020-18976"],"status":"published","title":"Buffer Overflow in Tcpreplay v4.3.2 allows attackers to cause a Denial of Service via the ...","description":"Buffer Overflow in Tcpreplay v4.3.2 allows attackers to cause a Denial of Service via the 'do_checksum' function in 'checksum.c'. It can be triggered by sending a crafted pcap file to the 'tcpreplay-edit' binary. This issue is different than CVE-2019-8381.","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00665,"percentile":0.52097,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-120"],"published":"2021-08-25T15:54:05Z","modified":"2026-10-26T12:02:29Z","fixes":[{"ecosystem":"Debian:12","package":"tcpreplay","fixed_in":["4.3.3-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"tcpreplay","fixed_in":["4.3.3-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"tcpreplay","fixed_in":["4.3.3-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"tcpreplay","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.3-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"tcpreplay","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.3-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"tcpreplay","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.3-1"}]}]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"tcpreplay","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.4.4-2","3.4.4-2+deb8u1build0.16.04.1","3.4.4-2+deb8u1ubuntu0.1~esm1","3.4.4-2+deb8u1ubuntu0.1~esm2","3.4.4-2+deb8u1ubuntu0.1~esm3"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"tcpreplay","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.2.6-1","4.2.6-1ubuntu0.1~esm1","4.2.6-1ubuntu0.1~esm2","4.2.6-1ubuntu0.1~esm3","4.2.6-1ubuntu0.1~esm4","4.2.6-1ubuntu0.1~esm5"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"tcpreplay","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.3.2-1build1","4.3.2-1ubuntu0.1~esm1","4.3.2-1ubuntu0.1~esm2","4.3.2-1ubuntu0.1~esm3"]}],"products":[{"vendor":"broadcom","product":"tcpreplay"}],"references":[{"url":"https://github.com/appneta/tcpreplay/issues/556","tags":["x_refsource_MISC","x_transferred","Exploit","Issue Tracking","Patch","Third Party Advisory","fix","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-18976"},{"url":"https://github.com/advisories/GHSA-v6p2-879w-fx47"},{"url":"https://security-tracker.debian.org/tracker/CVE-2020-18976","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2020-18976","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-18976","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2020-18976","description":"Buffer Overflow in Tcpreplay v4.3.2 allows attackers to cause a Denial of Service via the 'do_checksum' function in 'checksum.c'. It can be triggered by sending a crafted pcap file to the 'tcpreplay-edit' binary. This issue is different than CVE-2019-8381.","status":"published","published":"2021-08-25T15:54:05Z","modified":"2024-08-04T14:08:30.547Z","updated_at":"2026-11-02T14:35:59.434367Z"}],"euvd":[{"id":"EUVD-2020-10887","description":"Buffer Overflow in Tcpreplay v4.3.2 allows attackers to cause a Denial of Service via the 'do_checksum' function in 'checksum.c'. It can be triggered by sending a crafted pcap file to the 'tcpreplay-edit' binary. This issue is different than CVE-2019-8381.","status":"published","published":"2021-08-25T15:54:05Z","modified":"2024-08-04T14:08:30Z","updated_at":"2026-11-03T03:07:25.877716Z"}],"ghsa":[{"id":"GHSA-v6p2-879w-fx47","title":"Buffer Overflow in Tcpreplay v4.3.2 allows attackers to cause a Denial of Service via the ...","description":"Buffer Overflow in Tcpreplay v4.3.2 allows attackers to cause a Denial of Service via the 'do_checksum' function in 'checksum.c'. It can be triggered by sending a crafted pcap file to the 'tcpreplay-edit' binary. This issue is different than CVE-2019-8381.","status":"published","published":"2022-05-24T19:12:11Z","modified":"2023-01-30T05:01:48Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T14:46:29.327755Z"}],"nvd":[{"id":"CVE-2020-18976","description":"Buffer Overflow in Tcpreplay v4.3.2 allows attackers to cause a Denial of Service via the 'do_checksum' function in 'checksum.c'. It can be triggered by sending a crafted pcap file to the 'tcpreplay-edit' binary. This issue is different than CVE-2019-8381.","status":"published","published":"2021-08-25T16:15:08.687Z","modified":"2026-06-17T02:59:31.873Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-120"],"updated_at":"2026-11-02T14:06:45.704484Z"}],"osv":[{"id":"CVE-2020-18976","description":"Buffer Overflow in Tcpreplay v4.3.2 allows attackers to cause a Denial of Service via the 'do_checksum' function in 'checksum.c'. It can be triggered by sending a crafted pcap file to the 'tcpreplay-edit' binary. This issue is different than CVE-2019-8381.","status":"published","published":"2021-08-25T16:15:08.687Z","modified":"2026-10-20T10:52:04.255435169Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:15.212689Z"},{"id":"DEBIAN-CVE-2020-18976","description":"Buffer Overflow in Tcpreplay v4.3.2 allows attackers to cause a Denial of Service via the 'do_checksum' function in 'checksum.c'. It can be triggered by sending a crafted pcap file to the 'tcpreplay-edit' binary. This issue is different than CVE-2019-8381.","status":"published","published":"2021-08-25T16:15:08.687Z","modified":"2026-10-26T12:02:29.147801263Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:33.384087Z"},{"id":"UBUNTU-CVE-2020-18976","description":"Buffer Overflow in Tcpreplay v4.3.2 allows attackers to cause a Denial of Service via the 'do_checksum' function in 'checksum.c'. It can be triggered by sending a crafted pcap file to the 'tcpreplay-edit' binary. This issue is different than CVE-2019-8381.","status":"published","published":"2021-08-25T16:15:00Z","modified":"2025-09-08T16:46:16Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:54:23.344108Z"}]}}