SB2020051231 - Multiple vulnerabilities in Microsoft Windows Kernel

Description

This security bulletin contains information about 3 vulnerabilities.

1) Buffer overflow (CVE-ID: CVE-2020-1114)

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 when processing objects in memory within the Windows kernel. A local user can create a malicious application, launch it on the system and execute arbitrary code with SYSTEM privileges.

2) Out-of-bounds read (CVE-ID: CVE-2020-1072)

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

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/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 Windows kernel. A local user can use a specially crafted application to trigger out-of-bounds read error and read contents of memory on the system.

3) Buffer overflow (CVE-ID: CVE-2020-1087)

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 privilege so the system.

The vulnerability exists due to a boundary error in the Windows Kernel when handling objects in memory. A local user can create a specially crafted application, trigger memory corruption and execute arbitrary code on the target system with elevated privileges.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1114
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1072
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1087