CVE-2020-36478

An issue was discovered in Mbed TLS before 2.25.0 (and before 2.16.9 LTS and before 2.7.18 LTS). A NULL algorithm parameters entry looks identical to an array of REAL (size zero) and thus the certificate is considered valid. However, if the parameters do not match in any way, then the certificate should be considered invalid.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 48%
VendorProductVersion
armmbed_tls
𝑥
< 2.7.18
armmbed_tls
2.8.0 ≤
𝑥
< 2.16.9
armmbed_tls
2.17.0 ≤
𝑥
< 2.25.0
siemenslogo\!_cmr2020_firmware
𝑥
< 2.2
siemenslogo\!_cmr2040_firmware
𝑥
< 2.2
siemenssimatic_rtu3031c_firmware
*
siemenssimatic_rtu3041c_firmware
*
siemenssimatic_rtu3030c_firmware
*
siemenssimatic_rtu3000c_firmware
*
debiandebian_linux
9.0
debiandebian_linux
10.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
mbedtls
bullseye
2.16.9-0.1
fixed
bookworm
2.28.3-1
fixed
trixie
2.28.8-1
fixed
sid
3.6.2-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
mbedtls
noble
not-affected
mantic
not-affected
lunar
not-affected
kinetic
not-affected
jammy
not-affected
impish
not-affected
hirsute
not-affected
focal
needs-triage
bionic
needs-triage
xenial
needs-triage
trusty
dne