Improper Authentication vulnerability in B&R Industrial Automation B&R VC4 (VNC-Server modules).  This vulnerability may allow an unauthenticated network-based attacker to bypass the authentication mechanism of the VC4 visualization on affected devices. The impact of this vulnerability depends on the functionality provided in the visualization. This issue affects B&R VC4: from 3.* through 3.96.7, from 4.0* through 4.06.7, from 4.1* through 4.16.3, from 4.2* through 4.26.8, from 4.3* through 4.34.6, from 4.4* through 4.45.1, from 4.5* through 4.45.3, from 4.7* through 4.72.9.

A reflected cross-site scripting (XSS) vulnerability exists in System Diagnostics Manager of B&R Automation Runtime versions >=3.00 and <=C4.93 that enables a remote attacker to execute arbitrary JavaScript in the context of the users browser session.

B&R APROL versions < R 4.2-07 doesn’t process correctly specially formatted data packages sent to port 55502/tcp, which may allow a network based attacker to cause an application Denial-of-Service.

Insufficient validation of input parameters when changing configuration on Tbase server in B&R APROL versions < R 4.2-07 could result in buffer overflow. This may lead to Denial-of-Service conditions or execution of arbitrary code.

Insufficient check of preconditions could lead to Denial of Service conditions when calling commands on the Tbase server of B&R APROL versions < R 4.2-07.

 Lack of verification in B&R APROL Tbase server versions < R 4.2-07 may lead to memory leaks when receiving messages

Missing authentication when creating and managing the B&R APROL database in versions < R 4.2-07 allows reading and changing the system configuration. 

Improper Input Validation vulnerability in the project upload mechanism in B&R Automation Studio version >=4.0 may allow an unauthenticated network attacker to execute code.

Buffer Overflow vulnerability in B&R Automation Runtime webserver allows an unauthenticated network-based attacker to stop the cyclic program on the device and cause a denial of service.

An issue was discovered in B&R Industrial Automation APROL before R4.2 V7.08. An attacker can get information from the AprolSqlServer DBMS by bypassing authentication, a different vulnerability than CVE-2019-16356 and CVE-2019-9983.