#VU21193 Cross-site request forgery in SINEMA Remote Connect Server - CVE-2019-13920

Vulnerability identifier: #VU21193

Vulnerability risk: Low

CVSSv4.0: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-13920

CWE-ID: CWE-352

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SINEMA Remote Connect Server
Server applications / SCADA systems

Vendor: Siemens

Description

The vulnerability allows a remote attacker to perform cross-site request forgery attacks.

The vulnerability exists due to insufficient validation of the HTTP request origin in some parts of the web application. A remote attacker who is able to trigger requests of a logged-in user to the application can trick the victim to visit a specially crafted web page and perform arbitrary actions on behalf of the victim on the vulnerable website, such as switching the connectivity state of a user or a device.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SINEMA Remote Connect Server: before 2.0 SP1

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External links
https://cert-portal.siemens.com/productcert/pdf/ssa-884497.pdf
https://www.us-cert.gov/ics/advisories/icsa-19-260-02

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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.