CVE-2023-4104 — An invalid Polkit Authentication check and missing authentication requirements f
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
Published
2023-09-11T08:02:53.854Z
Last modified
2025-07-03T13:57:22.751Z
01What is this vulnerability?
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).
02Affected products
| Vendor | Product | Versions |
|---|
| Mozilla | Mozilla VPN 2.16.1 | unspecified |
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2023-09-11T08:02:53.854Z
- Last modified: 2025-07-03T13:57:22.751Z
09References
- bugzilla.mozilla.org — https://bugzilla.mozilla.org/show_bug.cgi?id=1831318
- github.com — https://github.com/mozilla-mobile/mozilla-vpn-client/pull/7055
- github.com — https://github.com/mozilla-mobile/mozilla-vpn-client/pull/7110
- github.com — https://github.com/mozilla-mobile/mozilla-vpn-client/pull/7151
- www.mozilla.org — https://www.mozilla.org/security/advisories/mfsa2023-39/
- www.openwall.com — https://www.openwall.com/lists/oss-security/2023/08/03/1
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