Disable Zscaler using machine tunnel restart

An Improper Validation of Integrity Check Value in Zscaler Client Connector on Windows allows an authenticated user to disable ZIA/ZPA by interrupting the service restart from Zscaler Diagnostics. This issue affects Client Connector: before 4.2.0.149.

ZSATrayManager Arbitrary File Deletion

An arbitrary file deletion in ZSATrayManager where it protects the temporary encrypted ZApp issue reporting file from the unprivileged end user access and modification. Fixed version: Win ZApp 4.3.0 and later.

Revert password check incorrect type validation

In some rare cases, there is a password type validation missing in Revert Password check and for some features it could be disabled. Fixed Version: Win ZApp 4.3.0.121 and later.

Lack of input santization on Zscaler Client Connector enables arbitrary code execution

ZSATray passes the previousInstallerName as a config parameter to TrayManager, and TrayManager constructs the path and appends previousInstallerName to get the full path of the exe. Fixed Version: Win ZApp 4.3.0.121 and later.

ZScalerService Local Privilege Escalation

The ZScaler service is susceptible to a local privilege escalation vulnerability found in the ZScalerService process. Fixed Version: Mac ZApp 4.2.0.241 and later.

Untrusted Search Path While Executing REG DELETE by Uninstaller

The Zscaler Client Connector Installer and Unsintallers for Windows prior to 3.6 had an unquoted search path vulnerability. A local adversary may be able to execute code with SYSTEM privileges.

ZApp Installer Privilege Escalation Vulnerabilities

Multiple vulnerabilities in the Zscaler Client Connector Installer and Uninstaller for Windows prior to 3.6 allowed execution of binaries from a low privileged path. A local adversary may be able to execute code with SYSTEM privileges.

Privilege Escalation for ZCC macOS via PATH Variable

Zscaler Client Connector for macOS prior to 3.7 had an unquoted search path vulnerability via the PATH variable. A local adversary may be able to execute code with root privileges.

Heap Based Buffer Overflow in Library

Buffer overflow vulnerability in the signelf library used by Zscaler Client Connector on Linux allows Code Injection. This issue affects Zscaler Client Connector for Linux: before 1.3.1.6.

Client IPC validation bypass

Origin Validation Error vulnerability in Zscaler Client Connector on Linux allows Inclusion of Code in Existing Process. This issue affects Zscaler Client Connector for Linux: before 1.3.1.6.

IPC Bypass Through PLT Section in ELF

Improper Verification of Cryptographic Signature vulnerability in Zscaler Client Connector on Linux allows Code Injection. This issue affects Zscaler Client Connector for Linux: before 1.3.1.6.

LPE using arbitrary file delete with Symlinks

Zscaler Client Connector for Windows before 4.1 writes/deletes a configuration file inside specific folders on the disk. A malicious user can replace the folder and execute code as a privileged user.

ZCC on Linux privilege escalation

An Improper Input Validation vulnerability in Zscaler Client Connector on Linux allows Privilege Escalation. This issue affects Client Connector: before 1.4.0.105

DHCP routing options can manipulate interface-based VPN traffic

DHCP can add routes to a client’s routing table via the classless static route option (121). VPN-based security solutions that rely on routes to redirect traffic can be forced to leak traffic over the physical interface. An attacker on the same local network can read, disrupt, or possibly modify network traffic that was expected to be protected by the VPN.

Output encoding missing in redrurl parameter

When using local accounts for administration, the redirect url parameter was not encoded correctly, allowing for an XSS attack providing admin login.

A URL parameter during login flow was vulnerable to injection. An attacker could insert a malicious domain in this parameter, which would redirect the user after auth and send the authorization token to the redirected domain.

Linux ZCC allows unsigned updates, allowing elevated Code Execution

An Improper Verification of Cryptographic Signature vulnerability in Zscaler Client Connector on Linux allows replacing binaries.This issue affects Linux Client Connector: before 1.4.0.105

Traffic being bypassed by ZCC by configuring synthetic IP range as local network

An authentication bypass by spoofing of a device with a synthetic IP address is possible in Zscaler Client Connector on Windows, allowing a functionality bypass. This issue affects Client Connector: before 3.9.

PAC Files Exposed to Internet Websites

Origin Validation Error vulnerability in Zscaler Client Connector on Linux allows Privilege Abuse. This issue affects Zscaler Client Connector for Linux: before 1.3.1.6.

Privilege Escalation Using PID Reuse in ZCC macOS

The Zscaler Client Connector for macOS prior to 3.6 did not sufficiently validate RPC clients. A local adversary without sufficient privileges may be able to shutdown the Zscaler tunnel by exploiting a race condition.