Phison PS3111-S11 controller firmware versions through SBFQT1.3 expose privileged vendor unique commands over the ATA interface with absent or defeatable authentication mechanisms. Attackers can bypass the weak CRC-16 based unlock handshake or exploit builds with no VUC lock to read and write controller memory and raw flash, persisting implants across power cycles.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
High
Admin privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products
phison electronics corporation:ps3111-s11 controller firmware
References 4
https://github.com/trulycrisp/disksec
disclosure@vulncheck.com
https://github.com/trulycrisp/psychite
disclosure@vulncheck.com
https://trulycrisp.github.io/drivefirmware/phison_s11/
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/phison-ps3111-s11-controller-firmware-miss…
disclosure@vulncheck.com