SB2017071117 - Multiple vulnerabilities in Windows kernel

Description

This security bulletin contains information about 2 vulnerabilities.

1) Memory corruption (CVE-ID: CVE-2017-8561)

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 improper handling of object in memory in Windows kernel. A local user can execute arbitrary code on the target system with elevated privileges.

2) Information disclosure (CVE-ID: CVE-2017-8564)

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:P/U:Clear

The vulnerability allows a local user to obtain potentially sensitive information.

The vulnerability exists due to Windows kernel fails to properly initialize a memory address. A local user can obtain information that could lead to a Kernel Address Space Layout Randomization (KASLR) bypass.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8561
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8564