PT-2021-9423 · Zscaler · Zscaler Client Connector

Published 2021-07-15 · Updated 2021-07-27 · CVE-2020-11633

Positive Technologies (AI Summary)

CVSS v2.0

10

Critical

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Zscaler Client Connector for Windows versions prior to 2.1.2.74

Description The issue is related to a stack-based buffer overflow that occurs when connecting to misconfigured TLS servers. This could potentially allow an adversary to execute arbitrary code with system privileges.

Recommendations For versions prior to 2.1.2.74, update to version 2.1.2.74 or later to resolve the issue.

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2020-11633

Affected Products

Zscaler Client Connector

References · 3

• https://osv.dev/vulnerability/CVE-2020-11633 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-11633 · Security Note
• https://help.zscaler.com/zscaler-client-connector/client-connector-app-release-summary-2020?applicable_category=Windows&applicable_version=2.1.2.81 · Vendor Advisory