SB2018111319 - Multiple vulnerabilities in Microsoft Windows win32k component

Description

This security bulletin contains information about 2 vulnerabilities.

1) Information disclosure (CVE-ID: CVE-2018-8565)

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 attacker to gain access to potentially sensitive information.

The vulnerability exists due to component improper providing of kernel information by the win32k component. A local attacker can run a specially crafted application and gain unauthorized access to sensitive information on the system.

2) Privilege escalation (CVE-ID: CVE-2018-8562)

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 attacker to gain elevated privileges on the target system.

The vulnerability exists due to improper handling of objects in memory by the win32k component. A local attacker can run a specially crafted application and execute arbitrary code with elevated privileges

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8565
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8562