CVE-2020-28397 Missing authorization in SIMATIC Drive Controller family
An attacker can extract protected PLC program variables via port 102/tcp due to incorrect authorization checks in Siemens SIMATIC devices.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-28397?
CVE-2020-28397 is a medium-severity missing authorization vulnerability in Siemens SIMATIC Drive Controller family, published on 10 Aug 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability has been identified in SIMATIC Drive Controller family (All versions < V2.9.2), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions < V21.9), SIMATIC S7 PLCSIM Advanced (All versions > V2 < V4), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (Version V4.4), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions > V2.5 < V2.9.2), SIMATIC S7-1500 Software Controller (All versions > V2.5 < V21.9), TIM 1531 IRC (incl. SIPLUS NET variants) (Version V2.1). Due to an incorrect authorization check in the affected component, an attacker could extract information about access protected PLC program variables over port 102/tcp from an affected device when reading multiple attributes at once.
Weakness: CWE-863
Which versions are affected by CVE-2020-28397?
It affects 56 products.
Products include Siemens Cpu1510sp F-1 Firmware, Siemens Cpu 1211c Firmware, Siemens Cpu 1212c Firmware, Siemens Cpu 1212fc Firmware, Siemens Cpu 1214c Firmware, Siemens Cpu 1214fc Firmware and 50 more.
How do I fix CVE-2020-28397?
No fix has been published for CVE-2020-28397 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2020-28397 being exploited?
There is no known exploitation of CVE-2020-28397 in the wild and no public exploit code.
Sources
Also known as GHSA-wg3f-fv3w-mw54.