Zscaler Client Connector up to 4.2.0 on Windows Repair App toctou

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.4$0-$5k0.00

Summaryinfo

A vulnerability has been found in Zscaler Client Connector up to 4.2.0 on Windows and classified as very critical. This affects an unknown part of the component Repair App. The manipulation leads to toctou. This vulnerability is uniquely identified as CVE-2024-23463. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Zscaler Client Connector up to 4.2.0 on Windows and classified as very critical. This issue affects an unknown part of the component Repair App. The manipulation with an unknown input leads to a toctou vulnerability. Using CWE to declare the problem leads to CWE-367. The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Anti-tampering protection of the Zscaler Client Connector can be bypassed under certain conditions when running the Repair App functionality. This affects Zscaler Client Connector on Windows prior to 4.2.1

The advisory is shared at help.zscaler.com. The identification of this vulnerability is CVE-2024-23463 since 01/17/2024. The exploitation is known to be easy. The attack may be initiated remotely. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 03/02/2026).

Upgrading to version 4.2.1 eliminates this vulnerability. The upgrade is hosted for download at help.zscaler.com.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.6
VulDB Meta Temp Score: 8.4

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.1
NVD Vector: 🔍

CNA Base Score: 8.8
CNA Vector (Zscaler, Inc.): 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Toctou
CWE: CWE-367 / CWE-362
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Client Connector 4.2.1

Timelineinfo

01/17/2024 🔍
04/30/2024 +103 days 🔍
04/30/2024 +0 days 🔍
03/02/2026 +671 days 🔍

Sourcesinfo

Advisory: help.zscaler.com
Status: Confirmed

CVE: CVE-2024-23463 (🔍)
GCVE (CVE): GCVE-0-2024-23463
GCVE (VulDB): GCVE-100-262517

Entryinfo

Created: 04/30/2024 20:31
Updated: 03/02/2026 23:46
Changes: 04/30/2024 20:31 (65), 03/02/2026 23:46 (13)
Complete: 🔍
Cache ID: 216::103

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