2020-20741 | Beckhoff CX9020 CE Remote Display Tool improper authentication (advisory-2019-006)
| CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system. |
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack. |
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability. |
|---|---|---|
| 7.3 | $0-$5k | 0.21 |
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.
Vendor
Name
VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.3
VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔒
VulDB Reliability: 🔍
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| Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
Class: Weak authentication
CWE: CWE-287
ATT&CK: Unknown
Local: No
Remote: Yes
Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒
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Threat Intelligence
Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍Recommended: no mitigation known
Status: 🔍
0-Day Time: 🔒
08/13/2020 CVE assigned
07/24/2021 Advisory disclosed
07/24/2021 VulDB entry created
07/28/2021 VulDB last updateAdvisory: advisory-2019-006
Status: Confirmed
CVE: CVE-2020-20741 (🔒)
Created: 07/24/2021 08:30
Updated: 07/28/2021 14:19
Changes: (2) source_cve_assigned source_cve_nvd_summary
Complete: 🔍
Comments
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