#VU46526 Improper Restriction of Excessive Authentication Attempts in Siemens products - CVE-2020-15786

Vulnerability identifier: #VU46526

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-15786

CWE-ID: CWE-307

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SIMATIC HMI Basic Panels 2nd Generation
Server applications / SCADA systems
SIMATIC HMI Comfort Panels
Server applications / SCADA systems
SIMATIC HMI Mobile Panels
Server applications / SCADA systems

Vendor: Siemens

Description

The vulnerability allows a remote attacker to gain access to the system.

The vulnerability exists due to the authentication mechanism has no brute-force prevention. A remote attacker can launch a brute-force authentication attack to discover user passwords and obtain access to the Sm@rt Server.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

SIMATIC HMI Basic Panels 2nd Generation: All versions

SIMATIC HMI Comfort Panels: All versions

SIMATIC HMI Mobile Panels: All versions

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External links
https://ics-cert.us-cert.gov/advisories/icsa-20-252-06

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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.