CVE-2022-4149

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.

CVSS v3 7.0 HIGH

7.0^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.0 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.netskope.com/company/security-compliance-and-assurance/security-advisories-and-disclosures/netskope-security-advisory-nskpsa-2023-002	Vendor Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*

cpe:2.3:a:netskope:netskope:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2023-06-15 07:15

Updated : 2023-06-30 00:08

NVD link : CVE-2022-4149

Mitre link : CVE-2022-4149

CVE.ORG link : CVE-2022-4149

JSON object : View

Products Affected

microsoft

windows

netskope

netskope

CWE

CWE-367

Time-of-check Time-of-use (TOCTOU) Race Condition

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