CVE-2020-12510

Published: Nov 19, 2020 Last Modified: Nov 21, 2024 EU-VD ID: EUVD-2020-4812 Aliases: GSD-2020-12510
ExploitDB:
Other exploit source:
Google Dorks:
HIGH 7,3
Source: [email protected]
Attack Vector: local
Attack Complexity: low
Privileges Required: low
User Interaction: required
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
MEDIUM 6,0
Source: [email protected]
Access Vector: network
Access Complexity: medium
Authentication: single
Confidentiality: partial
Integrity: partial
Availability: partial

Description

AI Translation Available

The default installation path of the TwinCAT XAR 3.1 software in all versions is underneath C:\TwinCAT. If the directory does not exist it and further subdirectories are created with permissions which allow every local user to modify the content. The default installation registers TcSysUI.exe for automatic execution upon log in of a user. If a less privileged user has a local account he or she can replace TcSysUI.exe. It will be executed automatically by another user during login. This is also true for users with administrative access. Consequently, a less privileged user can trick a higher privileged user into executing code he or she modified this way. By default Beckhoff’s IPCs are shipped with TwinCAT software installed this way and with just a single local user configured. Thus the vulnerability exists if further less privileged users have been added.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0021
Percentile
0,4th
Updated

EPSS Score Trend (Last 90 Days)

276

Incorrect Default Permissions

Draft
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Confidentiality Integrity
Potential Impacts:
Read Application Data Modify Application Data
Applicable Platforms
Technologies: Not Technology-Specific, ICS/OT
Likelihood of Exploit: Medium
View CWE Details
Application

Twincat Extended Automation Runtime by Beckhoff

Product Information
Vendor Beckhoff
Product Twincat Extended Automation Runtime
Version 3.1
cpe:2.3:a:beckhoff:twincat_extended_automation_runtime:3.1:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
https://cert.vde.com/en-us/advisories/vde-2020-037
Third Party Advisory
https://cert.vde.com/en-us/advisories/vde-2020-037
https://cert.vde.com/en-us/advisories/vde-2020-037
Third Party Advisory
https://cert.vde.com/en-us/advisories/vde-2020-037