High severity · published May 21, 2021
CVE-2020-27212
STMicroelectronics STM32L4 devices through 2020-10-19 have incorrect access control
7.0
CVSS
0.3%
EPSS
No
On KEV
Description
STMicroelectronics STM32L4 devices through 2020-10-19 have incorrect access control. The flash read-out protection (RDP) can be degraded from RDP level 2 (no access via debug interface) to level 1 (limited access via debug interface) by injecting a fault during the boot phase.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 28% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SF
Stm32cubel4 Firmware · ST
through 1.16.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-27212
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-27212
Third Party Advisory
https://eprint.iacr.org/2021/640
Third Party Advisory
https://www.aisec.fraunhofer.de/de/das-institut/wissenschaftliche-exzellenz/security-and-trust-in-open-source-security-tokens.html
Third Party Advisory
https://www.aisec.fraunhofer.de/en/FirmwareProtection.html
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6.1
CVE-2021-29414
STMicroelectronics STM32L4 devices through 2021-03-29 have incorrect physical access control