#VU31922 Improper Authorization in Linux kernel - CVE-2020-15780
Published: July 27, 2020 / Updated: December 28, 2023
Vulnerability identifier: #VU31922
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear
CVE-ID: CVE-2020-15780
CWE-ID: CWE-285
Exploitation vector: Local access
Exploit availability:
Public exploit is available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to bypass authorization checks.
The vulnerability exists due to improper authorization in "in drivers/acpi/acpi_configfs.c". A local administrator can inject malicious ACPI tables via configfs to bypass lockdown and secure boot restrictions.
Remediation
Install updates from vendor's website.
External links
- http://www.openwall.com/lists/oss-security/2020/07/20/7
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7.7
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=75b0cea7bf307f362057cc778efe89af4c615354
- https://git.zx2c4.com/american-unsigned-language/tree/american-unsigned-language-2.sh
- https://www.openwall.com/lists/oss-security/2020/06/15/3