Multiple vulnerabilities in Siemens SIMATIC MV400
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2020-25241 CVE-2020-27632 |
| CWE-ID | CWE-20 CWE-330 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
SIMATIC MV400 Hardware solutions / Security hardware applicances |
| Vendor | Siemens |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Input validation error
EUVDB-ID: #VU51379
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-2020-25241
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 underlying TCP stack of the affected products does not correctly validate the sequence number for incoming TCP RST packages. 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 MV400: before 7.0.6
External linkshttp://ics-cert.us-cert.gov/advisories/icsa-21-068-07
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.
2) Use of insufficiently random values
EUVDB-ID: #VU50596
Risk: Medium
CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-27632
CWE-ID:
CWE-330 - Use of Insufficiently Random Values
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to the ISN generator is initialized with a constant value and has constant increments. A remote attacker can interfere with traffic, spoof the connection and gain access to sensitive information.
MitigationInstall updates from vendor's website.
Vulnerable software versionsSIMATIC MV400: before 7.0.6
External linkshttp://ics-cert.us-cert.gov/advisories/icsa-21-068-07
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.
