Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC Service Port 102 access control

Summaryinfo

A vulnerability marked as critical has been reported in Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC, SIMATIC ET 200SP Open Controller CPU 1515SP PC2, SIMATIC S7-1200 CPU, SIMATIC S7-1500 CPU, SIMATIC S7-1500 Software Controller and SIMATIC S7-PLCSIM Advanced. This affects an unknown function of the component Service Port 102. Performing a manipulation results in access control. This vulnerability was named CVE-2019-10943. The attack may be initiated remotely. There is no available exploit. It is suggested to use restrictive firewalling.

Detailsinfo

A vulnerability was found in Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC, SIMATIC ET 200SP Open Controller CPU 1515SP PC2, SIMATIC S7-1200 CPU, SIMATIC S7-1500 CPU, SIMATIC S7-1500 Software Controller and SIMATIC S7-PLCSIM Advanced (SCADA Software). It has been classified as critical. This affects an unknown code of the component Service Port 102. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

A vulnerability has been identified in SIMATIC ET 200SP Open Controller CPU 1515SP PC (All versions), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (All versions), SIMATIC S7-1200 CPU family (All versions >= V4.0), SIMATIC S7-1500 CPU family (All versions), SIMATIC S7-1500 Software Controller (All versions), SIMATIC S7-PLCSIM Advanced (All versions). An attacker with network access to port 102/tcp could potentially modify the user program on the PLC in a way that the running code is different from the source code which is stored on the device. An attacker must have network access to affected devices and must be able to perform changes to the user program. The vulnerability could impact the perceived integrity of the user program stored on the CPU. An engineer that tries to obtain the code of the user program running on the device, can receive different source code that is not actually running on the device. No public exploitation of the vulnerability was known at the time of advisory publication.

The weakness was presented 08/13/2019. This vulnerability is uniquely identified as CVE-2019-10943 since 04/08/2019. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 11/25/2023). The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

It is possible to mitigate the weakness by firewalling tcp/102.

See VDB-139981 for similar entry. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• SCADA Software

Vendor

• Siemens

Name

• SIMATIC ET 200SP Open Controller CPU 1515SP PC
• SIMATIC ET 200SP Open Controller CPU 1515SP PC2
• SIMATIC S7-1200 CPU
• SIMATIC S7-1500 CPU
• SIMATIC S7-1500 Software Controller
• SIMATIC S7-PLCSIM Advanced

License

• commercial

Website

• Vendor: https://www.siemens.com/

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