CVE-2023-4104

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-09-11 · updated 2026-06-17
Weakness: CWE-862

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).

Affected products

Mozilla VPN 2.16.1: before 2.16.1 — fixed in 2.16.1

How to fix

Upgrade to a fixed version: Mozilla VPN 2.16.1 2.16.1. Check the vendor advisory for mitigations.

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
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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