Full Report
Cleartext Storage of Sensitive Information vulnerability (CVE-2025-4053) has been found in Be-Tech Mifare Classic cards software.
Analysis Summary
# Vulnerability: Cleartext Storage of Sensitive Information in Be-Tech Mifare Classic Cards Software
## CVE Details
- CVE ID: CVE-2025-4053
- CVSS Score: Information not explicitly provided in the text; marked as high impact due to bypass capability. (Severity estimation based on impact: Critical)
- CWE: CWE-312 (Cleartext Storage of Sensitive Information)
## Affected Systems
- Products: Be-Tech Mifare Classic cards software and associated systems.
- Versions: All versions are affected.
- Configurations: Any system utilizing Be-Tech Mifare Classic card technology.
## Vulnerability Description
The vulnerability stems from the storage of sensitive data in cleartext on Be-Tech Mifare Classic cards. An attacker gaining access to a standard hotel guest card can leverage this flaw to derive the necessary information to create a "master key card." This master card grants unauthorized access to all locks secured by the vulnerable system within the building.
## Exploitation
- Status: Not explicitly stated as exploited in the wild; however, PoC capability exists implicitly through the described attack scenario.
- Complexity: Implied Low/Medium, as the attacker needs physical access to a card but the resulting key creation is highly impactful.
- Attack Vector: Physical (requires access to at least one legitimate card, but final impact is widespread physical access).
## Impact
- Confidentiality: High (Sensitive access credentials are leaked).
- Integrity: Critical (Ability to completely bypass physical security controls).
- Availability: Low (No direct impact on system uptime, but operational integrity is compromised).
## Remediation
### Patches
- The fix requires a comprehensive upgrade pathway: Replacement of the software, the encoder hardware, the Mifare cards themselves, and the Printed Circuit Boards (PCBs) within the door locks. No simple patch is sufficient.
### Workarounds
- No specific temporary workarounds were provided in the source material other than the comprehensive replacement steps. Migration to a more secure, non-cleartext storage system is implicitly required.
## Detection
- Detection methods related to this vulnerability are generally not applicable until physical evidence of unauthorized key cloning or penetration is found.
- Detection should focus on auditing system logs for unauthorized master key creation events, though this detection is contingent on the new, patched system having better logging capabilities.
## References
- Vendor advisory: N/A (Information sourced from CERT Polska report).
- Relevant links:
- CVE Record: hxxps://www.cve.org/CVERecord?id=CVE-2025-4053
- CERT Polska CVD Policy: hxxps://cert.pl/en/cvd/