SB2018121111 - Multiple vulnerabilities in Microsoft Windows kernel
Published: December 11, 2018
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 7 secuirty vulnerabilities.
1) Buffer overflow (CVE-ID: CVE-2018-8649)
The vulnerability allows a local user to perform denial of service (DoS) attack.
The vulnerability exists due to a boundary error n Windows kernel. A local unprivileged user can cause the Windows kernel to crash.
2) Buffer overflow (CVE-ID: CVE-2018-8641)
The vulnerability allows a local user to execute arbitrary code with escalated privileges.
The vulnerability exists due to a boundary error in Windows kernel-mode driver win32k.sys. A local user can use a specially crafted application to execute arbitrary code with SYSTEM privileges.
3) Memory corruption (CVE-ID: CVE-2018-8639)
The vulnerability allows a local user to gain elevated privileges on the target system.
The vulnerability exists due to a boundary error in Windows kernel-mode driver win32k.sys. A local user can use a specially crafted application to execute arbitrary code with SYSTEM privileges.4) Out-of-bounds read (CVE-ID: CVE-2018-8637)
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition Windows kernel. A local user can run a specially crafted application to read contests from kernel memory and use the information to bypass Kernel Address Space Layout Randomization (KASLR) protection.
5) Out-of-bounds read (CVE-ID: CVE-2018-8622)
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition in Windows kernel. A local user can read contents of kernel memory.
6) Out-of-bounds read (CVE-ID: CVE-2018-8621)
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition in Windows kernel. A local user can read contents of kernel memory.
7) Out-of-bounds read (CVE-ID: CVE-2018-8477)
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition in Windows kernel. A local user can read contents of kernel memory.
Remediation
Install update from vendor's website.
References
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8649
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8641
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8639
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8637
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8622
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8621
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8477