Oracle Linux 7 Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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The Oracle Linux operating system must remove all software components after updated versions have been installed.
<VulnDiscussion>Previous versions of software components that are not removed from the information system after updates have been installed m...Rule Low Severity -
SRG-OS-000445-GPOS-00199
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must enable SELinux.
<VulnDiscussion>Without verification of the security functions, security functions may not operate correctly and the failure may go unnoticed...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be configured so that the x86 Ctrl-Alt-Delete key sequence is disabled on the command line.
<VulnDiscussion>A locally logged-on user who presses Ctrl-Alt-Delete when at the console, can reboot the system. If accidentally pressed, as ...Rule High Severity -
SRG-OS-000480-GPOS-00228
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must define default permissions for all authenticated users in such a way that the user can only read and modify their own files.
<VulnDiscussion>Setting the most restrictive default permissions ensures that when new accounts are created, they do not have unnecessary acc...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be a vendor supported release.
<VulnDiscussion>An operating system release is considered "supported" if the vendor continues to provide security patches for the product. Wi...Rule High Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system security patches and updates must be installed and up to date.
<VulnDiscussion>Timely patching is critical for maintaining the operational availability, confidentiality, and integrity of information techn...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must not have unnecessary accounts.
<VulnDiscussion>Accounts providing no operational purpose provide additional opportunities for system compromise. Unnecessary accounts includ...Rule Medium Severity -
SRG-OS-000104-GPOS-00051
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be configured so that all Group Identifiers (GIDs) referenced in the /etc/passwd file are defined in the /etc/group file.
<VulnDiscussion>If a user is assigned the GID of a group not existing on the system, and a group with the GID is subsequently created, the us...Rule Low Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be configured so that the root account must be the only account having unrestricted access to the system.
<VulnDiscussion>If an account other than root also has a User Identifier (UID) of "0", it has root authority, giving that account unrestricte...Rule High Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be configured so that all files and directories have a valid owner.
<VulnDiscussion>Unowned files and directories may be unintentionally inherited if a user is assigned the same User Identifier (UID) as the UI...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be configured so that all files and directories have a valid group owner.
<VulnDiscussion>Files without a valid group owner may be unintentionally inherited if a group is assigned the same Group Identifier (GID) as ...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be configured so that all local interactive user accounts, upon creation, are assigned a home directory.
<VulnDiscussion>If local interactive users are not assigned a valid home directory, there is no place for the storage and control of owned fi...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be configured so that all local interactive users have a home directory assigned and defined in the /etc/passwd file.
<VulnDiscussion>If local interactive users are not assigned a valid home directory, there is no place for the storage and control of files th...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be configured so that all local interactive user home directories have mode 0750 or less permissive.
<VulnDiscussion>Excessive permissions on local interactive user home directories may allow unauthorized access to user files by other users.&...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be configured so that all local interactive user home directories are owned by their respective users.
<VulnDiscussion>If a local interactive user does not own their home directory, unauthorized users could access or modify the user's files, an...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be configured so that all local interactive user home directories are group-owned by the home directory owners primary group.
<VulnDiscussion>If the Group Identifier (GID) of a local interactive user's home directory is not the same as the primary GID of the user, th...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be configured so that all files and directories contained in local interactive user home directories have a valid owner.
<VulnDiscussion>Unowned files and directories may be unintentionally inherited if a user is assigned the same User Identifier "UID" as the UI...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be configured so that all files and directories contained in local interactive user home directories are group-owned by a group of which the home directory owner is a member.
<VulnDiscussion>If a local interactive user's files are group-owned by a group of which the user is not a member, unintended users may be abl...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be configured so that all files and directories contained in local interactive user home directories have a mode of 0750 or less permissive.
<VulnDiscussion>If a local interactive user files have excessive permissions, unintended users may be able to access or modify them.</Vuln...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be configured so that all local initialization files for interactive users are owned by the home directory user or root.
<VulnDiscussion>Local initialization files are used to configure the user's shell environment upon logon. Malicious modification of these fil...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be configured so that all local initialization files for local interactive users are be group-owned by the users primary group or root.
<VulnDiscussion>Local initialization files for interactive users are used to configure the user's shell environment upon logon. Malicious mod...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be configured so that all local initialization files have mode 0740 or less permissive.
<VulnDiscussion>Local initialization files are used to configure the user's shell environment upon logon. Malicious modification of these fil...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be configured so that all local interactive user initialization files executable search paths contain only paths that resolve to the users home directory.
<VulnDiscussion>The executable search path (typically the PATH environment variable) contains a list of directories for the shell to search t...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be configured so that local initialization files do not execute world-writable programs.
<VulnDiscussion>If user start-up files execute world-writable programs, especially in unprotected directories, they could be maliciously modi...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be configured so that all system device files are correctly labeled to prevent unauthorized modification.
<VulnDiscussion>If an unauthorized or modified device is allowed to exist on the system, there is the possibility the system may perform unin...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group
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