CVE-2022-0547 — Authentication Bypass by Primary Weakness in Openvpn

CWE-305 — Authentication Bypass by Primary WeaknessCWE-287 — Improper Authentication9 documents8 sources
Severity
9.8CRITICALNVD
EPSS
0.6%
top 31.28%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
OpenvpnDebian OpenvpnDebian Linux+1 more
Timeline
PublishedMar 18
Latest updateJun 26

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9

Affected Packages4 packages

▶debiandebian/openvpn< openvpn 2.5.6-1 (bookworm)
▶NVDopenvpn/openvpn2.1.0 — 2.4.12+1
▶Debianopenvpn/openvpn< 2.5.1-3+deb11u1+3
▶CVEListV5openvpn/openvpnversion 2.1 until version 2.4.12 and 2.5.6.

Also affects: Debian Linux 9.0, Fedora 34, 36

Patches

Patch: openvpn.net ↗Patch: openvpn.net ↗

🔴Vulnerability Details

3
GHSA
GHSA-g28r-w65r-h89m: OpenVPN 2↗2022-03-19
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CVEList
CVE-2022-0547: OpenVPN 2↗2022-03-18
▶
OSV
CVE-2022-0547: OpenVPN 2↗2022-03-18
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📋Vendor Advisories

4
Ubuntu
OpenVPN vulnerability↗2024-06-26
▶
CISA ICS
​Siemens SINAMICS Medium Voltage Products↗2023-06-15
▶
CISA ICS
Siemens SCALANCE, RUGGEDCOM Third-Party↗2023-03-16
▶
Debian
CVE-2022-0547: openvpn - OpenVPN 2.1 until v2.4.12 and v2.5.6 may enable authentication bypass in externa...↗2022
▶

🕵️Threat Intelligence

1
Zscaler
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