An issue was discovered in BeyondTrust Privilege Management for Windows through 5.6. An attacker can spawn a process with multiple users as part of the security token (prior to Avecto elevation). When Avecto elevates the process, it removes the user who is launching the process, but not the second user. Therefore this second user still retains access and can give permission to the process back to the first user.

An issue was discovered in BeyondTrust Privilege Management for Windows through 5.6. If the publisher criteria is selected, it defines the name of a publisher that must be present in the certificate (and also requires that the certificate is valid). If an Add Admin token is protected by this criteria, it can be leveraged by a malicious actor to achieve Elevation of Privileges from standard user to administrator.

An issue was discovered in BeyondTrust Privilege Management for Windows through 5.6. When adding the Add Admin token to a process, and specifying that it runs at medium integrity with the user owning the process, this security token can be stolen and applied to arbitrary processes.

An issue was discovered in BeyondTrust Privilege Management for Windows through 5.6. When specifying a program to elevate, it can typically be found within the Program Files (x86) folder and therefore uses the %ProgramFiles(x86)% environment variable. However, when this same policy gets pushed to a 32bit machine, this environment variable does not exist. Therefore, since the standard user can create a user level environment variable, they can repoint this variable to any folder the user has full control of. Then, the folder structure can be created in such a way that a rule matches and arbitrary code runs elevated.