Medium severity · published Jul 19, 2021
CVE-2020-36421
An issue was discovered in Arm Mbed TLS before 2.23.0
5.3
CVSS
1.5%
EPSS
No
On KEV
Description
An issue was discovered in Arm Mbed TLS before 2.23.0. Because of a side channel in modular exponentiation, an RSA private key used in a secure enclave could be disclosed.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.5% · higher than 75% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
10.0 · source: NVD
MT
Mbed Tls · Arm
before 2.16.7; 2.17.0 before 2.23.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-36421
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-36421
Issue Tracking
https://bugs.gentoo.org/730752
Exploit
https://github.com/ARMmbed/mbedtls/issues/3394
Release Notes
https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.7
Release Notes
https://github.com/ARMmbed/mbedtls/releases/tag/v2.23.0
Mailing List
https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html
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