Quantum Secular Labs / Blog / Advisories

CVE-2023-6448: Unitronics Vision PLC and HMI Insecure Default Password Vulnerability

CVE-2023-6448 is rated critical with a CVSS v3.1 base score of 9.8 and affects Unitronics Vision PLC and HMI, along with 16 other products in NVD’s configuration data. Per its scoring, it can be exploited over the network, without authentication, without any user interaction. The scored impact on confidentiality, integrity and availability is the highest available. CISA added it to its Known Exploited Vulnerabilities catalog on 2023-12-11, which means exploitation in the wild has been observed.

Vulnerability description

Unitronics VisiLogic before version 9.9.00, used in Vision and Samba PLCs and HMIs, uses a default administrative password. An unauthenticated attacker with network access can take administrative control of a vulnerable system.

Severity breakdown

CVSS v3.1 9.8: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
  • Attack complexity: Low. No special conditions; the attack can be repeated reliably.
  • Privileges required: None. No account or prior access is needed.
  • User interaction: None. No action from any user is needed.
  • Scope: Unchanged. Impact stays within the vulnerable component.
  • Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
  • Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
  • Availability impact: High. Total loss of availability; the component can be shut down.

Underlying weakness

CWE-1188: Initialization of a Resource with an Insecure Default

The product initializes or sets a resource with a default that is intended to be changed by the product's installer, administrator, or maintainer, but the default is not secure.

CWE-798: Use of Hard-coded Credentials

The product contains hard-coded credentials, such as a password or cryptographic key.

Affected products

  • Unitronics Visilogic: before 9.9.00
  • Unitronics Vision1210 Firmware: before 12.38
  • Unitronics Vision1040 Firmware: before 12.38
  • Unitronics Vision700 Firmware: before 12.38
  • Unitronics Vision570 Firmware: before 12.38
  • Unitronics Vision560 Firmware: before 12.38
  • Unitronics Vision430 Firmware: before 12.38
  • Unitronics Vision350 Firmware: before 12.38
  • Unitronics Vision130 Firmware: before 12.38
  • Unitronics Vision230 Firmware: before 12.38
  • Unitronics Vision280 Firmware: before 12.38
  • Unitronics Vision290 Firmware: before 12.38
  • Unitronics Vision530 Firmware: before 12.38
  • Unitronics Vision120 Firmware: before 12.38
  • Unitronics Samba 3.5 Firmware: before 12.38

References