SB2023091252 - Multiple vulnerabilities in Microsoft Windows Common Log File System Driver

Description

This security bulletin contains information about 2 vulnerabilities.

1) Out-of-bounds read (CVE-ID: CVE-2023-38144)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to a boundary condition within the clfs.sys driver. A local user can open a specially crafted BLF file, trigger an out-of-bounds read error and read contents of memory on the system or perform a denial of service (DoS) attack.

2) Out-of-bounds read (CVE-ID: CVE-2023-38143)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition within the clfs.sys driver. A local user can trigger an out-of-bounds read error and read contents of memory on the system.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-38144
• https://www.zerodayinitiative.com/advisories/ZDI-23-1405/
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-38143
• https://www.zerodayinitiative.com/advisories/ZDI-23-1404/