Vulnerability identifier: #VU28932

Vulnerability risk: High

CVSSv3.1: 8.2 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-7589

CWE-ID: CWE-306

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
LOGO!8 BM
Hardware solutions / Other hardware appliances

Vendor: Siemens

Description

The vulnerability allows a remote attacker to bypass authentication checks.

The vulneability exists due to the affected product is missing authentication in the TDE service functionality in "NFSAccess" and "DELETEPROG" functions. A remote attacker with access to Port 135/TCP can read and modify the device configuration and obtain project files from the devices. 

Mitigation
Install updates from vendor's website.

Vulnerable software versions

LOGO!8 BM: All versions

---

External links
http://ics-cert.us-cert.gov/advisories/icsa-20-161-03
http://cert-portal.siemens.com/productcert/pdf/ssa-817401.pdf
http://talosintelligence.com/vulnerability_reports/TALOS-2020-1026
http://talosintelligence.com/vulnerability_reports/TALOS-2020-1025
http://talosintelligence.com/vulnerability_reports/TALOS-2020-1024

---

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.