CVE-2023-28807

high

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.

References

https://help.zscaler.com/zia/configuring-advanced-settings#domain-fronting

https://help.zscaler.com/zia/configuring-advanced-settings#dns-optimization

Details

Source: Mitre, NVD

Published: 2024-01-31

Updated: 2024-02-09

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:C/A:N

Severity: High

CVSS v3

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N