Library files must be owned by a system account.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-50785	OL6-00-000046	SV-64991r4_rule		Medium

Description
Files from shared library directories are loaded into the address space of processes (including privileged ones) or of the kernel itself at runtime. Proper ownership is necessary to protect the integrity of the system.

STIG	Date
Oracle Linux 6 Security Technical Implementation Guide	2016-12-20

Details

Check Text ( C-53257r4_chk )
System-wide shared library files, which are linked to executables during process load time or run time, are stored in the following directories by default: /lib /lib64 /usr/lib /usr/lib64 /usr/local/lib /usr/local/lib64 Kernel modules, which can be added to the kernel during runtime, are stored in "/lib/modules". All files in these directories should not be group-writable or world-writable. To find shared libraries that are not owned by "root" and do not match what is expected by the RPM, run the following command: for i in /lib /lib64 /usr/lib /usr/lib64 /usr/local/lib /usr/local/lib64 do for j in `find -L $i \! -user root` do rpm -V -f $j \| grep '^.....U' done done If the command returns any results, this is a finding.

Check Text ( C-53257r4_chk )

System-wide shared library files, which are linked to executables during process load time or run time, are stored in the following directories by default:

/lib
/lib64
/usr/lib
/usr/lib64
/usr/local/lib
/usr/local/lib64

Kernel modules, which can be added to the kernel during runtime, are stored in "/lib/modules". All files in these directories should not be group-writable or world-writable. To find shared libraries that are not owned by "root" and do not match what is expected by the RPM, run the following command:

for i in /lib /lib64 /usr/lib /usr/lib64 /usr/local/lib /usr/local/lib64
do
for j in `find -L $i \! -user root`
do
rpm -V -f $j | grep '^.....U'
done
done

If the command returns any results, this is a finding.

Fix Text (F-55579r4_fix)
System-wide shared library files, which are linked to executables during process load time or run time, are stored in the following directories by default: /lib /lib64 /usr/lib /usr/lib64 /usr/local/lib /usr/local/lib64 If any file in these directories is found to be owned by a user other than “root” and does not match what is expected by the RPM, correct its ownership by running one of the following commands: # rpm --setugids [PACKAGE_NAME] Or # chown root [FILE]

Fix Text (F-55579r4_fix)

System-wide shared library files, which are linked to executables during process load time or run time, are stored in the following directories by default:

/lib
/lib64
/usr/lib
/usr/lib64
/usr/local/lib
/usr/local/lib64

If any file in these directories is found to be owned by a user other than “root” and does not match what is expected by the RPM, correct its ownership by running one of the following commands:

# rpm --setugids [PACKAGE_NAME]

Or

# chown root [FILE]