Zscaler Client Connector up to 4.0 on Windows Configuration File link following

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Zscaler Client Connector up to 4.0 on Windows. This impacts an unknown function of the component Configuration File Handler. Such manipulation leads to link following. This vulnerability is traded as CVE-2023-28797. An attack has to be approached locally. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Zscaler Client Connector up to 4.0 on Windows. Affected by this issue is an unknown code block of the component Configuration File Handler. The manipulation with an unknown input leads to a link following vulnerability. Using CWE to declare the problem leads to CWE-59. The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Zscaler Client Connector for Windows before 4.1 writes/deletes a configuration file inside specific folders on the disk. A malicious user can replace the folder and execute code as a privileged user.

The weakness was shared 10/23/2023. The advisory is shared for download at help.zscaler.com. This vulnerability is handled as CVE-2023-28797 since 03/23/2023. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available.

Upgrading to version 4.1 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.7

VulDB Base Score: 6.7
VulDB Temp Score: 6.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.3
NVD Vector: 🔍

CNA Base Score: 6.3
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: Link following
CWE: CWE-59
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

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 4.1

Timelineinfo

03/23/2023 🔍
10/23/2023 +213 days 🔍
10/23/2023 +0 days 🔍
11/12/2023 +20 days 🔍

Sourcesinfo

Advisory: help.zscaler.com
Status: Confirmed

CVE: CVE-2023-28797 (🔍)
GCVE (CVE): GCVE-0-2023-28797
GCVE (VulDB): GCVE-100-243164

Entryinfo

Created: 10/23/2023 16:49
Updated: 11/12/2023 17:58
Changes: 10/23/2023 16:49 (51), 11/12/2023 17:58 (11)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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