CVE-2023-28803 Traffic being bypassed by ZCC by configuring synthetic IP range as local network

What is CVE-2023-28803?

CVE-2023-28803 is a medium-severity authentication bypass 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

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.

Weakness: CWE-290

Which versions are affected by CVE-2023-28803?

It affects 1 product.

Products include Zscaler Client Connector.

How do I fix CVE-2023-28803?

No fix has been published for CVE-2023-28803 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2023-28803 being exploited?

There is no known exploitation of CVE-2023-28803 in the wild and no public exploit code.

Other vulnerabilities in Zscaler Client Connector

• CVE-2020-11633 Memory corruption in n/a Critical 9.8
• CVE-2024-23463 Anti-Tampering bypass via Repair App functionality High 8.8
• CVE-2023-28804 Linux ZCC allows unsigned updates, allowing elevated Code Execution High 8.2
• CVE-2023-28799 Open redirect in Client Connector High 8.2
• CVE-2023-28800 Output encoding missing in redrurl parameter High 8.1

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-mwvw-6ggj-fhv5.