Missing Authentication for Critical Function in Siemens LOGO!8 BM



Published: 2020-06-10
Risk High
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-7589
CWE-ID CWE-306
Exploitation vector Network
Public exploit N/A
Vulnerable software
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LOGO!8 BM
Hardware solutions / Other hardware appliances

Vendor Siemens

Security Bulletin

This security bulletin contains one high risk vulnerability.

1) Missing Authentication for Critical Function

EUVDB-ID: #VU28932

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 - Missing Authentication for Critical Function

Exploit availability: No

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.



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