{"id":"CVE-2019-9971","url":"https://www.cyber-defence.io/tools/cve/CVE-2019-9971","generatedAt":"2026-10-27T23:36:27.124Z","title":"PhoneSystem Terminal in 3CX Phone System (Debian based installation) 16.0.0.1570 allows an attacker to gain root privileges by using sudo with the tcpdump command, without a password.","description":"PhoneSystem Terminal in 3CX Phone System (Debian based installation) 16.0.0.1570 allows an attacker to gain root privileges by using sudo with the tcpdump command, without a password. This occurs because the -z (aka postrotate-command) option to tcpdump can be unsafe when used in conjunction with sudo.","published":"2022-06-07T18:15:10.000Z","lastModified":"2026-06-17T02:44:57.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-269"],"affected":["3cx/phone system firmware","debian/debian linux"],"epss":{"score":0.0169,"percentile":0.76906,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (1.69%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://www.gosecure.net/blog","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://www.gosecure.net/blog/2022/05/31/security-advisory-multiple-vulnerabilities-impact-3cx-phone-system/","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://www.securusglobal.com/community/2014/03/17/how-i-got-root-with-sudo/","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://www.gosecure.net/blog","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.gosecure.net/blog/2022/05/31/security-advisory-multiple-vulnerabilities-impact-3cx-phone-system/","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.securusglobal.com/community/2014/03/17/how-i-got-root-with-sudo/","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2019-9971","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}