Junction Delete leading to elevation of privilege

Zscaler Client Connector Installer on Windows before version 3.4.0.124 improperly handled directory junctions during uninstallation. A local adversary may be able to delete folders in an elevated context.

The Zscaler Client Connector prior to 3.1.0 did not sufficiently validate RPC clients, which allows a local adversary to execute code with system privileges or perform limited actions for which they did not have privileges.

The Zscaler Client Connector for Windows prior to 2.1.2.105 had a DLL hijacking vulnerability caused due to the configuration of OpenSSL. A local adversary may be able to execute arbitrary code in the SYSTEM context.

The Zscaler Client Connector for Windows prior to 2.1.2.74 had a stack based buffer overflow when connecting to misconfigured TLS servers. An adversary would potentially have been able to execute arbitrary code with system privileges.

The Zscaler Client Connector prior to 2.1.2.150 did not quote the search path for services, which allows a local adversary to execute code with system privileges.

Signature validation issue leads to Anti-Tampering bypass

Anti-tampering can be disabled under certain conditions without signature validation. This affects Zscaler Client Connector <4.2.0.190 with anti-tampering enabled.

Signature validation error in DLL allows disabling anti-tampering protection

An Improper Validation of signature in Zscaler Client Connector on Windows allows an authenticated user to disable anti-tampering. This issue affects Client Connector on Windows <4.2.0.190.

Local Privilege Escalation on Zscaler Client Connector on Windows

While copying individual autoupdater log files, reparse point check was missing which could result into crafted attacks, potentially leading to a local privilege escalation. This issue affects Zscaler Client Connector on Windows <4.2.0.190.

Incorrect signature validation of package

The Zscaler Updater process does not validate the digital signature of the installer before execution, allowing arbitrary code to be locally executed. This affects Zscaler Client Connector on MacOS <4.2.

Zscaler bypass with administrative privileges on Windows

In certain cases, Zscaler Internet Access (ZIA) can be disabled by PowerShell commands with admin rights. This affects Zscaler Client Connector on Windows <4.2.1

Local Privilege Escalation via lack of input validation

An Improper Input Validation vulnerability in Zscaler Client Connector on MacOS allows OS Command Injection. This issue affects Zscaler Client Connector on MacOS <4.2.