SB2023080891 - Privilege escalation in Microsoft Windows Common Log File System Driver
Published: August 8, 2023 Updated: May 13, 2024
Security Bulletin ID
SB2023080891
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Incorrect conversion between numeric types (CVE-ID: CVE-2023-36900)
CWE-ID: CWE-681 - Incorrect Conversion between Numeric Types
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to incorrect integer conversion in Windows Common Log File System driver (clfs.sys). A local user can create a specially crafted BLF file to trigger an incorrect integer calculation before allocating a buffer and execute arbitrary code on the system.
Remediation
Install update from vendor's website.