2020-20741 | Beckhoff CX9020 CE Remote Display Tool improper authentication (advisory-2019-006)
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A vulnerability was found in Beckhoff CX9020 CX9020_CB3011_WEC7_HPS_v602_TC31_B4016.6. It has been declared as critical. Affected by this vulnerability is an unknown code block of the component CE Remote Display Tool. The manipulation with an unknown input leads to a weak authentication vulnerability. The CWE definition for the vulnerability is CWE-287. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:
Incorrect Access Control in Beckhoff Automation GmbH & Co. KG CX9020 with firmware version CX9020_CB3011_WEC7_HPS_v602_TC31_B4016.6 allows remote attackers to bypass authentication via the “CE Remote Display Tool” as it does not close the incoming connection on the Windows CE side if the credentials are incorrect.
The weakness was released 07/24/2021 as advisory-2019-006. It is possible to read the advisory at download.beckhoff.com. This vulnerability is known as CVE-2020-20741 since 08/13/2020. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn’t need any form of authentication. 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 07/28/2021).
There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.
VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.3
Status: Not defined
0-Day Time: 🔒
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