Vulnerability CVE-2019-10943


Published: 2019-08-13

Description:
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.

Type:

CWE-284

(Improper Access Control)

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None
Affected software
Siemens -> Simatic s7-1500 
Siemens -> Simatic s7-plcsim advanced 
Siemens -> Simatic et 200sp open controller cpu 1515sp pc2 firmware 
Siemens -> Simatic et 200sp open controller cpu 1515sp pc firmware 
Siemens -> Simatic s7-1200 cpu 1211c firmware 
Siemens -> Simatic s7-1200 cpu 1212c firmware 
Siemens -> Simatic s7-1200 cpu 1214c firmware 
Siemens -> Simatic s7-1200 cpu 1215c firmware 
Siemens -> Simatic s7-1200 cpu 1217c firmware 
Siemens -> Simatic s7-1500 cpu 1511c firmware 
Siemens -> Simatic s7-1500 cpu 1512c firmware 
Siemens -> Simatic s7-1500 cpu 1518 firmware 

 References:
https://cert-portal.siemens.com/productcert/pdf/ssa-232418.pdf

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