CVE-2023-28807 Bypass of ZIA domain fronting detection module through evasion technique
Attackers can bypass Zscaler Internet Access security controls by mismatching Connect Host and SNI to hide malicious traffic.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-28807?
CVE-2023-28807 is a medium-severity vulnerability in Zscaler ZIA, published on 31 Jan 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In Zscaler Internet Access (ZIA) a mismatch between Connect Host and Client Hello's Server Name Indication (SNI) enables attackers to evade network security controls by hiding their communications within legitimate traffic.
Weakness: CWE-295
Which versions are affected by CVE-2023-28807?
It affects 1 product.
Products include Zscaler Secure Internet and Saas Access.
How do I fix CVE-2023-28807?
No fix has been published for CVE-2023-28807 yet. Limit exposure of the affected software until one is available.
Is CVE-2023-28807 being exploited?
There is no known exploitation of CVE-2023-28807 in the wild and no public exploit code.
Sources
Also known as GHSA-p774-6cp5-x7cj.