Vulnerability in St J-Safe3
CVE-2021-43393
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.
EPSS: 0.002 (4.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
Affected products
- St J-safe3
- St J-safe3_firmware — versions 1.2.5
- St Stsafe-j
- St Stsafe-j_firmware — versions 1.1.4
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (x_refsource_MISC, Vendor Advisory)
- cve@mitre.org (Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-43393?
- CVE-2021-43393 is a medium-severity vulnerability in St J-Safe3, classified under Improper Verification of Cryptographic Signature. CVSS score: 6.2/10. Published 2022-03-04.
- How severe is CVE-2021-43393?
- Medium severity. CVSS v3 base score is 6.2 out of 10.