SB2022101214 - Multiple vulnerabilities in Microsoft Windows DHCP Client

Description

This security bulletin contains information about 2 vulnerabilities.

1) Buffer overflow (CVE-ID: CVE-2022-37980)

CWE-ID: CWE-119 - Memory corruption

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 a boundary error within the Windows DHCP Client service. A local user can send a specially crafted RPC call to the DHCP service, trigger memory corruption and execute arbitrary code with SYSTEM privileges.

2) Information disclosure (CVE-ID: CVE-2022-38026)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/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 excessive data output in Windows DHCP Client. A local user can read User Mode Service Memory.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-37980
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-38026