CVE-2023-28807: Bypass of ZIA domain fronting detection module through evasion technique
First published: Wed Jan 31 2024(Updated: )
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.
Credit: cve@zscaler.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Zscaler Secure Internet And Saas Access | <6.2r.290 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2023-28807?
CVE-2023-28807 is classified as a high severity vulnerability due to its potential to allow attackers to evade security controls.
How do I fix CVE-2023-28807?
To remediate CVE-2023-28807, ensure that you are using a version of Zscaler Internet Access above 6.2r.290 and properly configure the Connect Host and SNI settings.
What impact does CVE-2023-28807 have on an organization?
CVE-2023-28807 can lead to unauthorized access and data exfiltration by hiding malicious traffic within legitimate communications.
Which software versions are affected by CVE-2023-28807?
CVE-2023-28807 affects Zscaler Secure Internet and SaaS Access versions up to but not including 6.2r.290.
How can I identify exploitation of CVE-2023-28807 in my network?
Monitor your network traffic for unusual patterns that suggest legitimate traffic is being used to conceal malicious activities related to CVE-2023-28807.
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