#VU63923 Improper access control


Published: 2022-06-02

Vulnerability identifier: #VU63923

Vulnerability risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-4037

CWE-ID: CWE-284

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a local user to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions in the fs/inode.c:inode_init_owner() function logic of the Linux kernel. A local user can create files for the XFS file-system with an unintended group ownership and with group execution and SGID permission bits set to bypass implemented security restrictions and gain unauthorized access to the application.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: All versions


CPE

External links
http://access.redhat.com/errata/RHSA-2022:4814
http://bugzilla.redhat.com/show_bug.cgi?id=2027239


Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?


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