The Netskope client service (prior to R96) 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.
References
History
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MITRE Information
Status: PUBLISHED
Assigner: Netskope
Published: 2023-06-15T06:44:25.434Z
Updated: 2023-06-15T06:44:27.310Z
Reserved: 2022-11-28T12:19:11.243Z
Link: CVE-2022-4149
JSON object: View
NVD Information
Status : Analyzed
Published: 2023-06-15T07:15:08.710
Modified: 2023-06-30T00:08:31.660
Link: CVE-2022-4149
JSON object: View
Redhat Information
No data.
CWE