CVE-2021-43393

MediumCVSS 6.2/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 6.2/10CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-347

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

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

Timeline

Published: Mar 4, 2022
Last modified: Jun 17, 2026
NVD status: Modified

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