PT-2020-6153 · Linux+7 · Linux Kernel+7
Published
2020-06-05
·
Updated
2022-10-25
·
CVE-2020-24394
CVSS v3.1
7.1
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 5.7.8
Description
The issue is related to insufficient permission assignment checks for a critical resource in the fs/nfsd/vfs.c component of the Linux kernel. This can allow an attacker to gain unauthorized access to protected information. The problem arises because the current umask is not considered when setting permissions on new filesystem objects, particularly when the filesystem lacks ACL support.
Recommendations
For Linux kernel versions prior to 5.7.8, update to version 5.7.8 or later to resolve the issue. As a temporary workaround, consider restricting access to the fs/nfsd/vfs.c component until a patch is available. Additionally, ensure that filesystems have ACL support enabled to minimize the risk of exploitation.
Exploit
Fix
Incorrect Permission
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Almalinux
Centos
Linuxmint
Linux Kernel
Red Hat
Suse
Ubuntu