Finding ID | Version | Rule ID | IA Controls | Severity |
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V-221741 | OL07-00-021000 | SV-221741r603801_rule | Medium |
Description |
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The "nosuid" mount option causes the system not to execute setuid and setgid files with owner privileges. This option must be used for mounting any file system not containing approved setuid and setguid files. Executing files from untrusted file systems increases the opportunity for unprivileged users to attain unauthorized administrative access. |
STIG | Date |
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Oracle Linux 7 Security Technical Implementation Guide | 2023-12-01 |
Check Text ( C-23456r622265_chk ) |
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Verify file systems that contain user home directories are mounted with the "nosuid" option. Find the file system(s) that contain the user home directories with the following command: Note: If a separate file system has not been created for the user home directories (user home directories are mounted under "/"), this is not a finding as the "nosuid" option cannot be used on the "/" system. # awk -F: '($3>=1000)&&($7 !~ /nologin/){print $1, $3, $6}' /etc/passwd smithj 1001 /home/smithj thomasr 1002 /home/thomasr Check the file systems mounted at boot time with the following command: # more /etc/fstab UUID=a411dc99-f2a1-4c87-9e05-184977be8539 /home ext4 rw,relatime,discard,data=ordered,nosuid 0 2 If a file system found in "/etc/fstab" refers to the user home directory file system and it does not have the "nosuid" option set, this is a finding. |
Fix Text (F-23445r419296_fix) |
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Configure the "/etc/fstab" to use the "nosuid" option on file systems that contain user home directories. |