Vulnerability in Zscaler Secure Internet And Saas Access
CVE-2023-28807
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.
Vulnerability class: Improper Certificate Validation
EPSS: 0.003 (26.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.
Affected products
- Zscaler Secure_internet_and_saas_access
- Zscaler Zia — versions 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@zscaler.com (Product)
- cve@zscaler.com (Product)
Frequently asked questions
- What is CVE-2023-28807?
- CVE-2023-28807 is a medium-severity vulnerability in Zscaler Secure Internet And Saas Access, classified under Improper Certificate Validation. CVSS score: 5.1/10. Published 2024-01-31.
- How severe is CVE-2023-28807?
- Medium severity. CVSS v3 base score is 5.1 out of 10.
- Is CVE-2023-28807 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.