SB2022040121 - Improper preservation of permissions in Linux kernel
Published: April 1, 2022
Security Bulletin ID
SB2022040121
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper preservation of permissions (CVE-ID: CVE-2021-3847)
The vulnerability allows a local user to execute arbitrary code.
An unauthorized access to the execution of the setuid file with capabilities flaw in the Linux kernel OverlayFS subsystem was found in the way user copying a capable file from a nosuid mount into another mount. A local user could use this flaw to escalate their privileges on the system.
Remediation
Install update from vendor's website.