Verify that System Executables Have Restrictive Permissions
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Description
System executables are stored in the following directories by default:
/bin
/sbin
/usr/bin
/usr/libexec
/usr/local/bin
/usr/local/sbin
/usr/sbin
All files in these directories should not be group-writable or world-writable.
If any file FILE in these directories is found
to be group-writable or world-writable, correct its permission with the
following command:
Rationale
System binaries are executed by privileged users, as well as system services,
and restrictive permissions are necessary to ensure execution of these programs
cannot be co-opted.
Shell script
The following script can be run on the host to remediate the issue.
#!/bin/bash
DIRS="/bin /usr/bin /usr/local/bin /sbin /usr/sbin /usr/local/sbin /usr/libexec"
for dirPath in $DIRS; do
find "$dirPath" -perm /022 -exec chmod go-w '{}' \;
done
