Multiple vulnerabilities in Siemens SIMATIC CN 4100
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2023-49251 CVE-2023-49252 CVE-2023-49621 |
| CWE-ID | CWE-639 CWE-20 CWE-1392 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
SIMATIC CN 4100 Hardware solutions / Firmware |
| Vendor |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Authorization bypass through user-controlled key
EUVDB-ID: #VU85248
Risk: Medium
CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2023-49251
CWE-ID:
CWE-639 - Authorization Bypass Through User-Controlled Key
Exploit availability: No
DescriptionThe 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.
MitigationInstall updates from vendor's website.
Vulnerable software versionsSIMATIC CN 4100: before 2.7
External linkshttp://cert-portal.siemens.com/productcert/pdf/ssa-777015.pdf
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Input validation error
EUVDB-ID: #VU85249
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2023-49252
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe 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.
MitigationInstall updates from vendor's website.
Vulnerable software versionsSIMATIC CN 4100: before 2.7
External linkshttp://cert-portal.siemens.com/productcert/pdf/ssa-777015.pdf
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Use of default credentials
EUVDB-ID: #VU85250
Risk: High
CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2023-49621
CWE-ID:
CWE-1392 - Use of Default Credentials
Exploit availability: No
DescriptionThe 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.
MitigationInstall updates from vendor's website.
Vulnerable software versionsSIMATIC CN 4100: before 2.7
External linkshttp://cert-portal.siemens.com/productcert/pdf/ssa-777015.pdf
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
