CVE-2020-36425

moderate-risk
Published 2021-07-19

An issue was discovered in Arm Mbed TLS before 2.24.0. It incorrectly uses a revocationDate check when deciding whether to honor certificate revocation via a CRL. In some situations, an attacker can exploit this by changing the local clock.

Do I need to act?

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0.59% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.3/10 Medium
NETWORK / LOW complexity

Affected Products (2)

Affected Vendors

Debian Arm

References (14)

Issue Tracking https://bugs.gentoo.org/740108
Exploit https://github.com/ARMmbed/mbedtls/issues/3340
Third Party Advisory https://github.com/ARMmbed/mbedtls/pull/3433
Release Notes https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.8
Release Notes https://github.com/ARMmbed/mbedtls/releases/tag/v2.24.0
Release Notes https://github.com/ARMmbed/mbedtls/releases/tag/v2.7.17
Mailing List https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html
Issue Tracking https://bugs.gentoo.org/740108
Exploit https://github.com/ARMmbed/mbedtls/issues/3340
Third Party Advisory https://github.com/ARMmbed/mbedtls/pull/3433
Release Notes https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.8
Release Notes https://github.com/ARMmbed/mbedtls/releases/tag/v2.24.0
Release Notes https://github.com/ARMmbed/mbedtls/releases/tag/v2.7.17
Mailing List https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html
30
/ 100
moderate-risk
Severity 21/34 · High
Exploitability 2/34 · Minimal
Exposure 7/34 · Low