Siemens SIMATIC S7-1200 up to 4.2.2 Web Interface cross-site request forgery

Summaryinfo

A vulnerability marked as problematic has been reported in Siemens SIMATIC S7-1200 up to 4.2.2. This vulnerability affects unknown code of the component Web Interface. This manipulation causes cross-site request forgery. This vulnerability is tracked as CVE-2018-13800. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability classified as problematic was found in Siemens SIMATIC S7-1200 up to 4.2.2 (SCADA Software). Affected by this vulnerability is an unknown code of the component Web Interface. The manipulation with an unknown input leads to a cross-site request forgery vulnerability. The CWE definition for the vulnerability is CWE-352. The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request. As an impact it is known to affect integrity. The summary by CVE is:

A vulnerability has been identified in SIMATIC S7-1200 CPU family version 4 (All versions < V4.2.3). The web interface could allow a Cross-Site Request Forgery (CSRF) attack if an unsuspecting user is tricked into accessing a malicious link. Successful exploitation requires user interaction by a legitimate user, who must be authenticated to the web interface. A successful attack could allow an attacker to trigger actions via the web interface that the legitimate user is allowed to perform. This could allow the attacker to read or modify parts of the device configuration.

The bug was discovered 10/09/2018. The weakness was disclosed 10/10/2018 (Website). It is possible to read the advisory at cert-portal.siemens.com. This vulnerability is known as CVE-2018-13800 since 07/10/2018. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/25/2023).

The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $5k-$25k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 105542†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• SCADA Software

Vendor

• Siemens

Name

• SIMATIC S7-1200

Version

• 4.2.0
• 4.2.1
• 4.2.2

License

• commercial

Website

• Vendor: https://www.siemens.com/

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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