| Name | CVE-2022-0547 |
| Description | OpenVPN 2.1 until v2.4.12 and v2.5.6 may enable authentication bypass in external authentication plug-ins when more than one of them makes use of deferred authentication replies, which allows an external user to be granted access with only partially correct credentials. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-2992-1, ELA-601-1 |
| Debian Bugs | 1008015 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| openvpn (PTS) | jessie, jessie (lts) | 2.3.4-5+deb8u3 | fixed |
| stretch (security), stretch (lts), stretch | 2.4.0-6+deb9u4 | fixed |
| buster | 2.4.7-1+deb10u1 | vulnerable |
| bullseye | 2.5.1-3 | vulnerable |
| bookworm (security), bookworm | 2.6.3-1+deb12u2 | fixed |
| sid, trixie | 2.6.12-1 | fixed |
The information below is based on the following data on fixed versions.
Notes
[bullseye] - openvpn <no-dsa> (Minor issue)
[buster] - openvpn <no-dsa> (Minor issue)
https://community.openvpn.net/openvpn/wiki/CVE-2022-0547
https://github.com/OpenVPN/openvpn/commit/58ec3bb4aac77131118dbbc39a65181e7847adee (v2.4.12)
https://github.com/OpenVPN/openvpn/commit/af3e382649d96ae77cc5e42be8270f355e5cfec5 (v2.5.6)