CVE-2023-28796 IPC Bypass Through PLT Section in ELF

High 7.1 Published 23 Oct 2023 Updated 27 Feb 2025

An attacker can inject code into the Zscaler Client Connector on Linux by bypassing signature verification via the PLT section.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-28796?

CVE-2023-28796 is a high-severity code injection vulnerability in Zscaler Client Connector, published on 23 Oct 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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.

Weakness: CWE-347, CWE-94

Which versions are affected by CVE-2023-28796?

It affects 1 product.

Products include Zscaler Client Connector.

How do I fix CVE-2023-28796?

No fix has been published for CVE-2023-28796 yet. Limit exposure of the affected software until one is available.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2023-28796 being exploited?

There is no known exploitation of CVE-2023-28796 in the wild and no public exploit code.

Sources

Also known as GHSA-4pxq-qc65-2pqq.