CVE-2021-43393 — MEDIUM (6.2)

Vulnerability Description

STMicroelectronics STSAFE-J 1.1.4, J-SAFE3 1.2.5, and J-SIGN sometimes allow attackers to abuse signature verification. This is associated with the ECDSA signature algorithm on the Java Card J-SAFE3 and STSAFE-J platforms exposing a 3.0.4 Java Card API. It is exploitable for STSAFE-J in closed configuration and J-SIGN (when signature verification is activated) but not for J-SAFE3 EPASS BAC and EAC products. It might also impact other products based on the J-SAFE-3 Java Card platform.

CVSS Score

6.2

MEDIUM

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

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

HIGH

Availability

NONE

Affected Products

Vendor	Product	Versions
St	Stsafe-J Firmware	1.1.4
St	Stsafe-J	-
St	J-Safe3 Firmware	1.2.5
St	J-Safe3	-

Related Weaknesses (CWE)

CWE-347

References

https://community.st.com/s/toparticlesVendor Advisory
https://www.cert.ssi.gouv.fr/avis/CERTFR-2022-AVI-169/Third Party Advisory
https://community.st.com/s/toparticlesVendor Advisory
https://www.cert.ssi.gouv.fr/avis/CERTFR-2022-AVI-169/Third Party Advisory

FAQ

What is CVE-2021-43393?

CVE-2021-43393 is a vulnerability with a CVSS score of 6.2 (MEDIUM). STMicroelectronics STSAFE-J 1.1.4, J-SAFE3 1.2.5, and J-SIGN sometimes allow attackers to abuse signature verification. This is associated with the ECDSA signature algorithm on the Java Card J-SAFE3 a...

How severe is CVE-2021-43393?

CVE-2021-43393 has been rated MEDIUM with a CVSS base score of 6.2/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-43393?

Check the references section above for vendor advisories and patch information. Affected products include: St Stsafe-J Firmware, St Stsafe-J, St J-Safe3 Firmware, St J-Safe3.