CVE-2021-43392

MEDIUM
6.2
CVSS Score
Published: March 4, 2022 at 12:54 PM UTC
Updated: June 17, 2026 at 04:10 AM UTC
4 products affected across 1 vendorJ SAFE3 FirmwareStsafe J FirmwareStsafe-J

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Severity
MEDIUM6.2
Exploit prediction
EPSS 0.2%

Description

STMicroelectronics STSAFE-J 1.1.4, J-SAFE3 1.2.5, and J-SIGN sometimes allow attackers to obtain information on cryptographic secrets. 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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

st-j-safe3 (same device)
st-stsafe-j (same device)
80%
All versions
80%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-347

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