OpenSC is an open source smart card tools and middleware. Prior to version 0.27.0, an attacker with physical access to the computer at the time user or administrator uses a token can cause a stack-buffer-overflow WRITE in card-oberthur. The attack requires crafted USB device or smart card that would present the system with specially crafted responses to the APDUs.
This issue has been patched in version 0.27.0.
Attack Parameters
Attack Vector
Physical
Requires physical access
Attack Complexity
High
Difficult to exploit
Privileges Required
None
No privileges needed
User Interaction
Required
User action required
Impact Assessment
Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
Low
Partial disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 4
https://github.com/OpenSC/OpenSC/commit/efd1d479832141bcf705c2f47655ada4d5f92f5d
security-advisories@github.com
https://github.com/OpenSC/OpenSC/pull/3436
security-advisories@github.com
https://github.com/OpenSC/OpenSC/security/advisories/GHSA-q5fc-cw56-hwp2
security-advisories@github.com
https://github.com/OpenSC/OpenSC/wiki/CVE-2025-66215
security-advisories@github.com