CVE-2020-36478

2021-08-2300:00:00

ubuntu.com

mbed tls

invalid certificates

null algorithm parameters

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:L/Au:N/C:N/I:P/A:N

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS

0.003

Percentile

71.2%

JSON

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.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchmbedtls< anyUNKNOWN
ubuntu20.04noarchmbedtls< anyUNKNOWN
ubuntu16.04noarchmbedtls< anyUNKNOWN