CVE-2023-28807 - Vulnerability Details - OpenCVE

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.

Published: 2024-01-31

Score: 5.1 Medium

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

No analysis available yet.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Zscaler

ZIA

unaffected

Version	Status	Constraints
`0`	affected	< 6.2r.290

Configuration 1 [-]

cpe:2.3:a:zscaler:secure_internet_and_saas_access:*:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No remediation available yet.

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-2023-32442	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.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00038.

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://help.zscaler.com/zia/configuring-advanced-settings#dns-optimization
https://help.zscaler.com/zia/configuring-advanced-settings#domain-fronting

History

Tue, 17 Jun 2025 22:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Subscriptions

Zscaler Secure Internet And Saas Access

MITRE

Status: PUBLISHED

Assigner: Zscaler

Published: 2024-01-31T19:16:59.806Z

Updated: 2025-06-17T21:29:19.136Z

Reserved: 2023-03-23T18:29:15.803Z

Link: CVE-2023-28807

Vulnrichment

Updated: 2024-08-02T13:51:38.890Z

NVD

Status : Modified

Published: 2024-01-31T20:15:44.903

Modified: 2024-11-21T07:56:03.310

Link: CVE-2023-28807

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-295

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