Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2023-28803— Traffic being bypassed by ZCC by configuring synthetic IP range as local network

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 3.9之前版本存在安全漏洞，该漏洞源于允许攻击者使用合成的IP地址欺骗设备来绕过身份验证。

CVSS 5.9 · Medium EPSS 0.26% · P16

Possible ATT&CK Techniques 1 AI

T1199 · Trusted Relationship
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2023-28803

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Traffic being bypassed by ZCC by configuring synthetic IP range as local network
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用欺骗进行的认证绕过
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 3.9之前版本存在安全漏洞，该漏洞源于允许攻击者使用合成的IP地址欺骗设备来绕过身份验证。
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 ~ 3.9 -

II. Public POCs for CVE-2023-28803

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2023-28803

请登录查看更多情报信息。

Other References for CVE-2023-28803 (1)

Same Patch Batch · Zscaler · 2023-10-23 · 12 CVEs total

CVE-2023-28804 8.2 HIGH Linux ZCC allows unsigned updates, allowing elevated Code Execution
CVE-2021-26738 7.8 HIGH Privilege Escalation for ZCC macOS via PATH Variable
CVE-2023-28793 7.8 HIGH Heap Based Buffer Overflow in Library
CVE-2023-28795 7.8 HIGH Client IPC validation bypass
CVE-2023-28796 7.1 HIGH IPC Bypass Through PLT Section in ELF
CVE-2021-26735 6.7 MEDIUM Untrusted Search Path While Executing REG DELETE by Uninstaller
CVE-2021-26736 6.7 MEDIUM ZApp Installer Privilege Escalation Vulnerabilities
CVE-2023-28805 6.7 MEDIUM ZCC on Linux privilege escalation
CVE-2023-28797 6.3 MEDIUM LPE using arbitrary file delete with Symlinks
CVE-2021-26737 5.5 MEDIUM Privilege Escalation Using PID Reuse in ZCC macOS
CVE-2021-26734 4.4 MEDIUM Junction Delete leading to elevation of privilege

IV. Related Vulnerabilities

Same product: Client Connector
Same vendor: Zscaler
Same weakness: CWE-290

V. Comments for CVE-2023-28803

No comments yet

Leave a comment