Vulnerability · Published Jan 31, 2024 · Assigned by Zscaler
CVE-2023-28807Bypass of ZIA domain fronting detection module through evasion technique
Medium 5.1
In plain English
A medium-severity improper certificate validation in ZIA from Zscaler. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities).
Severity (CVSS 3.1)5.1Medium
Exploit odds (30 days)0.3%top 71.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
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.
Affected products (as reported)
Weakness: CWE-295 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N