CVE-2023-28803

Traffic being bypassed by ZCC by configuring synthetic IP range as local network

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Published Oct 23, 2023 CVSS 3.1 · 5.9 Medium EPSS < 1% KEV · Not listed

Description

An authentication bypass by spoofing of a device with a synthetic IP address is possible in Zscaler Client Connector on Windows, allowing a functionality bypass. This issue affects Client Connector: before 3.9.

Affected Products

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

Client Connector

unaffected

Version	Status	Constraints
`0`	affected	< 3.9

Configuration 1 [-]

cpe:2.3:a:zscaler:client_connector:*:*:*:*:*:windows:*:*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-2023-32438	An authentication bypass by spoofing of a device with a synthetic IP address is possible in Zscaler Client Connector on Windows, allowing a functionality bypass. This issue affects Client Connector: before 3.9.

Metrics

No CVSS v4.0

Attack Vector Adjacent Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.292% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://help.zscaler.com/client-connector/client-connector-app-release-summary-2023

History

No history.

Subscriptions

Zscaler Client Connector

Weaknesses

CWE-290

Sources

CVE record Updated: Sep 11, 2024, 2:31 PM

Status: PUBLISHED
Assigner: Zscaler
Published: Oct 23, 2023, 1:32 PM
Updated: Sep 11, 2024, 2:31 PM
Reserved: Mar 23, 2023, 6:29 PM

View source JSON

Vulnrichment Updated: Aug 2, 2024, 1:51 PM

Updated: Aug 2, 2024, 1:51 PM

NVD Updated: Jun 17, 2026, 5:48 AM

Status: Modified
Published: Oct 23, 2023, 2:15 PM
Modified: Jun 17, 2026, 5:48 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

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