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

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

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

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)

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/