CVE-2023-4996 Explained : Impact and Mitigation

This CVE-2023-4996 affects Netskope Client versions prior to 100. The vulnerability allows a malicious non-admin user to disable the Netskope client using a specially-crafted package, due to improper validation of permissions in the user control code. This can lead to the termination of the NSClient service.

Understanding CVE-2023-4996

This section delves into the details and impact of the CVE-2023-4996 vulnerability.

What is CVE-2023-4996?

CVE-2023-4996 is a local privilege escalation vulnerability in Netskope Client versions prior to 100. It stems from a flaw in the user control code, which can be exploited by a malicious non-admin user to disable the Netskope client.

The Impact of CVE-2023-4996

The impact of this vulnerability is categorized under CAPEC-554 Functionality Bypass. It has a CVSSv3.1 base score of 6.6, with a medium severity level. The availability impact is high, while confidentiality and integrity impacts are low. The attack complexity is low, and privileges required are also low.

Technical Details of CVE-2023-4996

This section provides a technical overview of the vulnerability, including the vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability exists in Netskope Client versions prior to 100 due to improper validation of permissions in the user control code, allowing a non-admin user to disable the Netskope client by using a specially-crafted package.

Affected Systems and Versions

The affected system is the Netskope Client, specifically versions prior to 100.

Exploitation Mechanism

The exploitation of CVE-2023-4996 involves a non-admin user leveraging the improper validation of permissions in the user control code to disable the Netskope client.

Mitigation and Prevention

Here are the steps to mitigate and prevent the exploitation of CVE-2023-4996.

Immediate Steps to Take

Netskope has patched the vulnerability in version Release101. Users are advised to upgrade their Netskope Client to version R101 or greater. This will address the security issue and ensure protection against exploitation.

Long-Term Security Practices

Implementing proper user control validation and regular security updates can help prevent similar vulnerabilities in the future. It is crucial to stay informed about security advisories and apply patches promptly.

Patching and Updates

Netskope has released a new version to fix the vulnerability. Customers can download the patched version from Netskope Support to secure their systems against potential attacks.