CVE-2023-4996: Local privilege escalation
First published: Mon Nov 06 2023(Updated: )
Netskope was made aware of a security vulnerability in its NSClient product for version 100 & prior where a malicious non-admin user can disable the Netskope client by using a specially-crafted package. The root cause of the problem was a user control code when called by a Windows ServiceController did not validate the permissions associated with the user before executing the user control code. This user control code had permissions to terminate the NSClient service.
Credit: psirt@netskope.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| All of | ||
| Netskope | <101 | |
| Microsoft Windows Operating System |
Remedy
Netskope patched the issue and released a new version. The issue was fixed in Release101. Customers are recommended to upgrade their client to the versions R101 or greater. Netskope download Instructions – Download Netskope Client and Scripts – Netskope Support https://support.netskope.com/s/article/Download-Netskope-Client-and-Scripts
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Frequently Asked Questions
What is CVE-2023-4996?
CVE-2023-4996 is a vulnerability that allows a malicious non-admin user to disable the Netskope client by using a specially-crafted package.
How does CVE-2023-4996 affect Netskope NSClient?
CVE-2023-4996 affects Netskope NSClient version 100 and prior, allowing a malicious non-admin user to disable the client.
What is the root cause of CVE-2023-4996?
The root cause of CVE-2023-4996 is a user control code issue when called by a Windows ServiceController.
Is Microsoft Windows affected by CVE-2023-4996?
No, Microsoft Windows is not vulnerable to CVE-2023-4996.
How severe is CVE-2023-4996?
CVE-2023-4996 has a severity rating of 8.8 (high).
How can I fix CVE-2023-4996?
To fix CVE-2023-4996, update Netskope NSClient to version 101 or later.
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