CVE Vulnerabilities

CVE-2020-0668

Incorrect Permission Assignment for Critical Resource

Published: Feb 11, 2020 | Modified: Jan 01, 2022
CVSS 3.x
7.8
HIGH
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
7.2 HIGH
AV:L/AC:L/Au:N/C:C/I:C/A:C
RedHat/V2
RedHat/V3
Ubuntu

An elevation of privilege vulnerability exists in the way that the Windows Kernel handles objects in memory, aka ‘Windows Kernel Elevation of Privilege Vulnerability’. This CVE ID is unique from CVE-2020-0669, CVE-2020-0670, CVE-2020-0671, CVE-2020-0672.

Weakness

The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors.

Affected Software

Name Vendor Start Version End Version
Windows_10 Microsoft - -
Windows_10 Microsoft 1607 1607
Windows_10 Microsoft 1709 1709
Windows_10 Microsoft 1803 1803
Windows_10 Microsoft 1809 1809
Windows_10 Microsoft 1903 1903
Windows_10 Microsoft 1909 1909
Windows_7 Microsoft - -
Windows_8.1 Microsoft - -
Windows_rt_8.1 Microsoft - -
Windows_server_2008 Microsoft - -
Windows_server_2008 Microsoft r2 r2
Windows_server_2008 Microsoft r2 r2
Windows_server_2012 Microsoft - -
Windows_server_2012 Microsoft r2 r2
Windows_server_2016 Microsoft - -
Windows_server_2016 Microsoft 1803 1803
Windows_server_2016 Microsoft 1903 1903
Windows_server_2016 Microsoft 1909 1909
Windows_server_2019 Microsoft - -

Potential Mitigations

  • Run the code in a “jail” or similar sandbox environment that enforces strict boundaries between the process and the operating system. This may effectively restrict which files can be accessed in a particular directory or which commands can be executed by the software.
  • OS-level examples include the Unix chroot jail, AppArmor, and SELinux. In general, managed code may provide some protection. For example, java.io.FilePermission in the Java SecurityManager allows the software to specify restrictions on file operations.
  • This may not be a feasible solution, and it only limits the impact to the operating system; the rest of the application may still be subject to compromise.
  • Be careful to avoid CWE-243 and other weaknesses related to jails.

References