close
magnifying glass
Get Started
magnifying glass
chevron
Support Language
close
Your Network of Tomorrow
Your Network of Tomorrow
Plan your path toward a faster, more secure, and more resilient network designed for the applications and users that you support.
chevron Get the white paper
            Experience Netskope
            Get Hands-on With the Netskope Platform
            Here's your chance to experience the Netskope One single-cloud platform first-hand. Sign up for self-paced, hands-on labs, join us for monthly live product demos, take a free test drive of Netskope Private Access, or join us for a live, instructor-led workshops.
            chevron Experience Netskope
              A Leader in SSE. Now a Leader in Single-Vendor SASE.
              Netskope is recognized as a Leader Furthest in Vision for both SSE and SASE Platforms
              2X a Leader in the Gartner® Magic Quadrant for SASE Platforms
              One unified platform built for your journey
              chevron Get the report
                ""
                Netskope One AI Security
                Organizations need secure AI to move their business forward, but controls and guardrails must not require sacrifices in speed or user experience. Netskope can help you say yes to the AI advantage.
                chevron Learn about Netskope One AI Security
                  ""
                  Netskope One AI Security
                  Organizations need secure AI to move their business forward, but controls and guardrails must not require sacrifices in speed or user experience. Netskope can help you say yes to the AI advantage.
                  chevron Learn about Netskope One AI Security
                    Modern data loss prevention (DLP) for Dummies eBook
                    Modern Data Loss Prevention (DLP) for Dummies
                    Get tips and tricks for transitioning to a cloud-delivered DLP.
                    chevron Get the eBook
                      Modern SD-WAN for SASE Dummies Book
                      Modern SD-WAN for SASE Dummies
                      Stop playing catch up with your networking architecture
                      chevron Get the eBook
                        Understanding where the risk lies
                        Advanced Analytics transforms the way security operations teams apply data-driven insights to implement better policies. With Advanced Analytics, you can identify trends, zero in on areas of concern and use the data to take action.
                        chevron Watch the demo
                            2025-10-UZTNA-ebook
                            6 Reasons Universal ZTNA is a Smart Escape from VPN and NAC Chaos
                            Ditch the complexity of VPNs and NAC. Learn how Universal ZTNA secures every user and device with one consistent framework.
                            chevron Get the eBook
                              Colgate-Palmolive Safeguards its "Intellectual Property” with Smart and Adaptable Data Protection
                              Colgate-Palmolive Safeguards its "Intellectual Property” with Smart and Adaptable Data Protection
                              chevron Read the case study
                                Netskope GovCloud
                                Netskope achieves FedRAMP High Authorization
                                Choose Netskope GovCloud to accelerate your agency’s transformation.
                                chevron Learn about Netskope GovCloud
                                    Netskope Technical Support
                                    Netskope Technical Support
                                    Our qualified support engineers are located worldwide and have diverse backgrounds in cloud security, networking, virtualization, content delivery, and software development, ensuring timely and quality technical assistance
                                    chevron Technical Support
                                      Netskope video
                                      Netskope Training
                                      Netskope training will help you become a cloud security expert. We are here to help you secure your digital transformation journey and make the most of your cloud, web, and private applications.
                                      chevron Explore Netskope Training
                                        ""
                                        Maximize your SASE ROI with Netskope Business Value Services
                                        Start proving ROI. Netskope BVS is a complimentary consulting service that quantifies the financial and strategic impact of your SASE transformation.
                                        chevron Request a consultation
                                          Let's do great things together
                                          ""
                                          Netskope’s partner-centric go-to-market strategy enables our partners to maximize their growth and profitability while transforming enterprise security.
                                          chevron Netskope Partners
                                            Netskope Security Advisory

                                            NSKPSA-2023-002

                                            Local privilege escalation using log files in Netskope Client

                                            The Netskope client service on Windows runs as NT AUTHORITY\SYSTEM which writes log files to a writable directory (C:\Users\Public\netSkope) for a standard user. The files are created and written with a SYSTEM account except one file (logplaceholder) which inherits permission giving all users full access control list. Netskope client restricts access to this file by allowing only read permissions as a standard user. Whenever the Netskope client service restarts, it deletes the logplaceholder and recreates, creating a race condition, which can be exploited by a malicious local user to create the file and set ACL permissions on the file. Once the file is created by a malicious user with proper ACL permissions, all files within C:\Users\Public\netSkope\ becomes modifiable by the unprivileged user. By using Windows pseudo-symlink, these files can be pointed to other places in the system and thus malicious users will be able to elevate privileges.

                                            Download the Security Advisory
                                            Share via Tags
                                            Netskope Resources
                                            Change the language
                                            English

                                            Security Advisory ID: NSKPSA-2023-002
                                            Severity Rating: High
                                            First Communicated: May 10, 2023
                                            Overall CVSS Score: 7.0
                                            Version: 1.0

                                             

                                            Description
                                            The Netskope client service on Windows runs as NT AUTHORITY\SYSTEM which writes log files to a writable directory (C:\Users\Public\netSkope) for a standard user. The files are created and written with a SYSTEM account except one file (logplaceholder) which inherits permission giving all users full access control list. Netskope client restricts access to this file by allowing only read permissions as a standard user. Whenever the Netskope client service restarts, it deletes the logplaceholder and recreates, creating a race condition, which can be exploited by a malicious local user to create the file and set ACL permissions on the file. Once the file is created by a malicious user with proper ACL permissions, all files within C:\Users\Public\netSkope\ becomes modifiable by the unprivileged user. By using Windows pseudo-symlink, these files can be pointed to other places in the system and thus malicious users will be able to elevate privileges.

                                             

                                            Affected Product(s) and Version(s)
                                            Netskope Client for Windows v95 & prior

                                             

                                            CVE-ID(s)
                                            CVE-2022-4149

                                             

                                            Remediation
                                            Netskope has patched the vulnerability and released a binary with a fix. Customers are recommended to upgrade their Netskope clients to v100 or later. Netskope download Instructions – Download Netskope Client and Scripts – Netskope Support

                                             

                                            Workaround
                                            Netskope has provided a documented guide on hardening Netskope Client with additional security features which will further strengthen security of the product. Here are the guidelines – https://docs.netskope.com/en/netskope-client-hardening.html

                                             

                                            General Security Best Practices
                                            Following are the security best practices recommended for Netskope products:

                                             

                                            Special Notes and Acknowledgement
                                            Netskope credits Dawson Medin from Mandiant for reporting this flaw.

                                             

                                            Exploitation and Public Disclosures
                                            Netskope is not aware of any public disclosure and exploitation of this vulnerability at the time of publication.

                                             

                                            Revision History

                                            VersionDateSectionNotes
                                            1.0May 10, 2023Initial release

                                             

                                             

                                            Legal Disclaimer
                                            To the maximum extent permitted by applicable law, information provided in this notice is provided “as is” without warranty of any kind. Your use of the information in this notice or materials linked herein are at your own risk. This notice and all aspects of the Netskope Product Security Incident Response Policy are subject to change without notice. Response is not guaranteed for any specific issue or class of issues. Your entitlements regarding warranties, support and maintenance, including vulnerabilities in any Netskope software or service, are governed solely by the applicable master agreement between Netskope and you. The statements in this notice do not modify, enlarge or otherwise amend any of your rights under the applicable master agreement, or create any additional warranties or commitments.

                                             

                                            About Netskope
                                            Netskope, the SASE leader, safely and quickly connects users directly to the internet, any application, and their infrastructure from any device, on or off the network. With CASB, SWG, and ZTNA built natively in a single platform, the Netskope Security Cloud provides the most granular context, via patented technology, to enable conditional access and user awareness while enforcing zero trust principles across data protection and threat prevention everywhere. Unlike others who force tradeoffs between security and networking, Netskope’s global security private cloud provides full compute capabilities at the edge.

                                            Netskope is fast everywhere, data-centric, and cloud-smart, all while enabling good digital citizenship and providing a lower total-cost-of-ownership.