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CVE-2023-41973— Lack of input santization on Zscaler Client Connector enables arbitrary code execution

Quick assessment

Affected
Zscaler Client Connector
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Zscaler Client Connector是zscaler的一个应用软件。一种安装在设备上的应用程序，可确保互联网流量和对组织内部应用程序的访问是安全的并符合组织的政策，即使不在公司网络时。 Zscaler Client Connector 4.3.0.121之前版本存在安全漏洞，该漏洞源于允许攻击者通过TrayManageer构造路径并附加previousInstallerName获得exe的完整路径。

CVSS 7.3 · High EPSS 0.31% · P22

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2023-41973

Vulnerability Information
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Vulnerability Title
Lack of input santization on Zscaler Client Connector enables arbitrary code execution
Source: CVE Program / CVE List V5
Vulnerability Description
ZSATray passes the previousInstallerName as a config parameter to TrayManager, and TrayManager constructs the path and appends previousInstallerName to get the full path of the exe. Fixed Version: Win ZApp 4.3.0.121 and later.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Zscaler Client Connector 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zscaler Client Connector是zscaler的一个应用软件。一种安装在设备上的应用程序，可确保互联网流量和对组织内部应用程序的访问是安全的并符合组织的政策，即使不在公司网络时。 Zscaler Client Connector 4.3.0.121之前版本存在安全漏洞，该漏洞源于允许攻击者通过TrayManageer构造路径并附加previousInstallerName获得exe的完整路径。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Zscaler Client Connector 0 ~ 4.3.0.121 -

II. Public POCs for CVE-2023-41973

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III. Intelligence Information for CVE-2023-41973

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Other References for CVE-2023-41973 (1)

Same Patch Batch · Zscaler · 2024-03-26 · 4 CVEs total

CVE-2023-41969 7.3 HIGH ZSATrayManager Arbitrary File Deletion
CVE-2023-41972 7.3 HIGH Revert password check incorrect type validation
CVE-2024-23482 7.0 HIGH ZScalerService Local Privilege Escalation

IV. Related Vulnerabilities

Same product: Client Connector
Same vendor: Zscaler
Same weakness: CWE-22

V. Comments for CVE-2023-41973

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