PT-2023-21979 · Zscaler · Zscaler Client Connector

Published 2023-10-23 · Updated 2023-10-27 · CVE-2023-28803

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Zscaler Client Connector versions prior to 3.9

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.

Recommendations For versions prior to 3.9, update to version 3.9 or later to resolve the issue. As a temporary workaround, consider restricting access to sensitive functionalities that could be exploited through the authentication bypass until a patch is applied.

Fix

Authentication Bypass by Spoofing

Weakness Enumeration

CWE-290

Related Identifiers

CVE-2023-28803

Affected Products

Zscaler Client Connector

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2023-28803 · Security Note
• https://osv.dev/vulnerability/CVE-2023-28803 · Vendor Advisory
• https://help.zscaler.com/client-connector/client-connector-app-release-summary-2023 · Note
• https://t.me/cibsecurity/72776 · Telegram Post
• https://twitter.com/VulmonFeeds/status/1716494872364876034 · Twitter Post
• https://twitter.com/CVEnew/status/1716448938713026887 · Twitter Post