SB2019111220 - Multiple privilege escalation vulnerabilities in Microsoft Windows

Description

This security bulletin contains information about 3 vulnerabilities.

1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2019-1420)

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

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 the way the dssvc.dll handles file creation. A local user can use a specially crafted application and execute arbitrary code on the target system with elevated privileges.

2) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2019-1422)

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

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 the way the iphlpsvc.dll handles file creation. A local user can use a specially crafted application and execute arbitrary code on the target system with elevated permissions.

3) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2019-1423)

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

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 the StartTileData.dll handles file creation in protected locations. A local user can use a specially crafted application and execute arbitrary code on the target system with elevated permissions.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1420
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1422
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1423