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CVE-2024-23456— Signature validation issue leads to Anti-Tampering bypass

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公司的一个轻量级代理。 Zscaler Client Connector 4.2.0.190之前版本存在安全漏洞，该漏洞源于无需签名验证即可禁用防篡改功能。

CVSS 7.8 · High EPSS 0.23% · P14

Possible ATT&CK Techniques 1 AI

T1562.001
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I. Basic Information for CVE-2024-23456

Vulnerability Information
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Vulnerability Title
Signature validation issue leads to Anti-Tampering bypass
Source: CVE Program / CVE List V5
Vulnerability Description
Anti-tampering can be disabled under certain conditions without signature validation. This affects Zscaler Client Connector <4.2.0.190 with anti-tampering enabled.
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:H
Source: CVE Program / CVE List V5
Vulnerability Type
密码学签名的验证不恰当
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公司的一个轻量级代理。 Zscaler Client Connector 4.2.0.190之前版本存在安全漏洞，该漏洞源于无需签名验证即可禁用防篡改功能。
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 ~ 4.2.0.190 -

II. Public POCs for CVE-2024-23456

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III. Intelligence Information for CVE-2024-23456

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Other References for CVE-2024-23456 (1)

Same Patch Batch · Zscaler · 2024-08-06 · 6 CVEs total

CVE-2024-23458 7.3 HIGH Local Privilege Escalation on Zscaler Client Connector on Windows
CVE-2024-23464 7.2 HIGH Zscaler bypass with administrative privileges on Windows
CVE-2024-23483 7.0 HIGH Local Privilege Escalation via lack of input validation
CVE-2024-23460 6.4 MEDIUM Incorrect signature validation of package
CVE-2023-28806 5.7 MEDIUM Signature validation error in DLL allows disabling anti-tampering protection

IV. Related Vulnerabilities

Same product: Client Connector
Same vendor: Zscaler
Same weakness: CWE-347

V. Comments for CVE-2024-23456

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