SB2022081005 - Multiple vulnerabilities in Microsoft Windows Partition Management Driver

Description

This security bulletin contains information about 2 vulnerabilities.

1) Integer overflow (CVE-ID: CVE-2022-34703)

CWE-ID: CWE-190 - Integer overflow

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:U/U:Clear

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to integer overflow within the partmgr.sys Windows partition management driver. A local user can trigger an integer overflow and execute arbitrary code with SYSTEM privileges.

2) Improper Authorization (CVE-ID: CVE-2022-33670)

CWE-ID: CWE-285 - Improper Authorization

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:U/U:Clear

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to improper authorization logic in partmgr.sys driver when accessing SCSI file handles. A local user can can execute arbitrary code with SYSTEM privileges.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-34703
• https://www.zerodayinitiative.com/advisories/ZDI-22-1072/
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-33670
• https://www.zerodayinitiative.com/advisories/ZDI-22-1071/