SB2024011014 - Multiple vulnerabilities in Siemens SIMATIC CN 4100
Published: January 10, 2024
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 vulnerabilities.
1) Authorization bypass through user-controlled key (CVE-ID: CVE-2023-49251)
CWE-ID: CWE-639 - Authorization Bypass Through User-Controlled Key
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to authentication bypass in the "intermediate installation" system. A remote user can login as root and take control of the device even after the affected device is fully set up.
2) Input validation error (CVE-ID: CVE-2023-49252)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to the IP configuration change without authentication to the device. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.
3) Use of default credentials (CVE-ID: CVE-2023-49621)
CWE-ID: CWE-1392 - Use of Default Credentials
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to the usage of default passwords in the "intermediate installation" system state. A remote attacker can use the credentials to gain complete control of the target device.
Remediation
Install update from vendor's website.