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 vulnerabilities.
1) Buffer overflow (CVE-ID: CVE-2018-8649)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
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)
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 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)
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:A/U:Clear
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)
CWE-ID: CWE-125 - Out-of-bounds read
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 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)
CWE-ID: CWE-125 - Out-of-bounds read
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 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)
CWE-ID: CWE-125 - Out-of-bounds read
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 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)
CWE-ID: CWE-125 - Out-of-bounds read
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 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