Oracle Linux 7 Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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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 -
The Oracle Linux operating system must be configured so that file systems containing user home directories are mounted to prevent files with the setuid and setgid bit set from being executed.
<VulnDiscussion>The "nosuid" mount option causes the system not to execute setuid and setgid files with owner privileges. This option must be...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must prevent files with the setuid and setgid bit set from being executed on file systems that are used with removable media.
<VulnDiscussion>The "nosuid" mount option causes the system not to execute "setuid" and "setgid" files with owner privileges. This option mus...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must prevent files with the setuid and setgid bit set from being executed on file systems that are being imported via Network File System (NFS).
<VulnDiscussion>The "nosuid" mount option causes the system not to execute "setuid" and "setgid" files with owner privileges. This option mus...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must prevent binary files from being executed on file systems that are being imported via Network File System (NFS).
<VulnDiscussion>The "noexec" mount option causes the system not to execute binary files. This option must be used for mounting any file syste...Rule Medium Severity -
SRG-OS-000368-GPOS-00154
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must disable Kernel core dumps unless needed.
<VulnDiscussion>Kernel core dumps may contain the full contents of system memory at the time of the crash. Kernel core dumps may consume a co...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must mount /dev/shm with secure options.
<VulnDiscussion>The "noexec" mount option causes the system to not execute binary files. This option must be used for mounting any file syste...Rule Low Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be configured so that all world-writable directories are group-owned by root, sys, bin, or an application group.
<VulnDiscussion>If a world-writable directory is not group-owned by root, sys, bin, or an application Group Identifier (GID), unauthorized us...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must set the umask value to 077 for all local interactive user accounts.
<VulnDiscussion>The umask controls the default access mode assigned to newly created files. A umask of 077 limits new files to mode 700 or le...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must have cron logging implemented.
<VulnDiscussion>Cron logging can be used to trace the successful or unsuccessful execution of cron jobs. It can also be used to spot intrusio...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be configured so that the cron.allow file, if it exists, is owned by root.
<VulnDiscussion>If the owner of the "cron.allow" file is not set to root, the possibility exists for an unauthorized user to view or to edit ...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be configured so that the cron.allow file, if it exists, is group-owned by root.
<VulnDiscussion>If the group owner of the "cron.allow" file is not set to root, sensitive information could be viewed or edited by unauthoriz...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be configured so that a separate file system is used for user home directories (such as /home or an equivalent).
<VulnDiscussion>The use of separate file systems for different paths can protect the system from failures resulting from a file system becomi...Rule Low Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must use a separate file system for /var.
<VulnDiscussion>The use of separate file systems for different paths can protect the system from failures resulting from a file system becomi...Rule Low Severity -
SRG-OS-000341-GPOS-00132
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must use a separate file system for the system audit data path large enough to hold at least one week of audit data.
<VulnDiscussion>The use of separate file systems for different paths can protect the system from failures resulting from a file system becomi...Rule Low Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must use a separate file system for /tmp (or equivalent).
<VulnDiscussion>The use of separate file systems for different paths can protect the system from failures resulting from a file system becomi...Rule Low Severity -
SRG-OS-000033-GPOS-00014
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must implement NIST FIPS-validated cryptography for the following: to provision digital signatures, to generate cryptographic hashes, and to protect data requiring data-at-rest protections in accordance with applicable federal laws, Executive Orders, directives, policies, regulations, and standards.
<VulnDiscussion>Use of weak or untested encryption algorithms undermines the purposes of using encryption to protect data. The operating syst...Rule High Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
The Oracle Linux operating system must be configured so that the file integrity tool is configured to verify Access Control Lists (ACLs).
<VulnDiscussion>ACLs can provide permissions beyond those permitted through the file mode and must be verified by file integrity tools.</V...Rule Low Severity
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