CVE-2022-0547

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
OpenVPNCNA
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CVEADP
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CISA-ADPADP
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 68%
VendorProductVersion
openvpnopenvpn
2.1.0 ≤
𝑥
< 2.4.12
openvpnopenvpn
2.5.0 ≤
𝑥
< 2.5.6
debiandebian_linux
9.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
openvpn
bullseye
no-dsa
buster
no-dsa
bookworm
2.6.3-1+deb12u2
fixed
bookworm (security)
2.6.3-1+deb12u2
fixed
sid
2.6.12-1
fixed
trixie
2.6.12-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
openvpn
noble
Fixed 2.5.5-1ubuntu3
released
mantic
Fixed 2.5.5-1ubuntu3
released
lunar
Fixed 2.5.5-1ubuntu3
released
kinetic
Fixed 2.5.5-1ubuntu3
released
jammy
Fixed 2.5.5-1ubuntu3
released
impish
Fixed 2.5.1-3ubuntu1.1
released
focal
Fixed 2.4.7-1ubuntu2.20.04.4
released
bionic
Fixed 2.4.4-2ubuntu1.7
released
xenial
Fixed 2.3.10-1ubuntu2.2+esm1
released
trusty
Fixed 2.3.2-7ubuntu3.2+esm1
released