You can check if the version of the RPM is identical in all 5 boxes and then you can check the MD5 of the mount file against the RPM database.
The following is an example of the commands involved:
jluis@Asterix:~> rpm -qf /bin/mount
jluis@Asterix:~> rpm -q --dump util-linux-2.12r+2.13rc2+git20070725-24.2|grep bin/mount
/bin/mount 74720 1192207682 11498e66ecf039a5262b9564369f87af 0104755 root root 0 0 0 X
jluis@Asterix:~> md5sum /bin/mount
As you can see, the MD5 from my mount file matches the RPM database for that file. If you see diferent MD5 hashes between the RPM database and the file, then you could have a security issue.