Title

RHEL 9 must prevent code from being executed on file systems that are used with removable media. (Cat II impact)

Discussion

The "noexec" mount option causes the system not to execute binary files. This option must be used for mounting any file system not containing approved binary files, as they may be incompatible. Executing files from untrusted file systems increases the opportunity for nonprivileged users to attain unauthorized administrative access.

Check Content

Verify file systems that are used for removable media are mounted with the "noexec" option with the following command: $ more /etc/fstab UUID=2bc871e4-e2a3-4f29-9ece-3be60c835222 /mnt/usbflash vfat noauto,owner,ro,nosuid,nodev,noexec 0 0 If a file system found in "/etc/fstab" refers to removable media and it does not have the "noexec" option set, this is a finding.

Fix Text

Configure the "/etc/fstab" to use the "noexec" option on file systems that are associated with removable media.

Additional Identifiers

Rule ID: SV-257857r925558_rule

Vulnerability ID: V-257857

Group Title: SRG-OS-000480-GPOS-00227

Expert Comments

CCIs tied to check.

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