Information disclosure in Siemens SIMATIC S7-300 and S7-400 CPUs
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2020-15791 |
| CWE-ID | CWE-522 |
| Exploitation vector | Local network |
| Public exploit | N/A |
| Vulnerable software |
SIMATIC S7-300 Hardware solutions / Firmware SIMATIC S7-400 Hardware solutions / Firmware |
| Vendor | Siemens |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) Insufficiently protected credentials
EUVDB-ID: #VU46521
Risk: Low
CVSSv4.0: 2.3 [CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2020-15791
CWE-ID:
CWE-522 - Insufficiently Protected Credentials
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain access to sensitive information on the system.
The vulnerability exists due to the authentication protocol between a client and a PLC via Port 102/TCP (ISO-TSAP) insufficiently protects the transmitted password. A remote attacker on the local network can obtain valid PLC credentials.
MitigationInstall updates from vendor's website.
Vulnerable software versionsSIMATIC S7-300: All versions
SIMATIC S7-400: All versions
CPE2.3 External linkshttps://ics-cert.us-cert.gov/advisories/icsa-20-252-02
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
