II - Mission Support Public
Rules and Groups employed by this XCCDF Profile
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SRG-OS-000480
<GroupDescription></GroupDescription>Group -
The operating system must use cryptographic mechanisms to protect and restrict access to information on portable digital media.
<VulnDiscussion>When data is written to portable digital media, such as thumb drives, floppy diskettes, compact disks, and magnetic tape, etc...Rule Medium Severity -
SRG-OS-000185
<GroupDescription></GroupDescription>Group -
The operating system must protect the confidentiality and integrity of information at rest.
<VulnDiscussion>When data is written to digital media, such as hard drives, mobile computers, external/removable hard drives, personal digita...Rule Low Severity -
SRG-OS-000216
<GroupDescription></GroupDescription>Group -
The operating system must use cryptographic mechanisms to protect the integrity of audit information.
<VulnDiscussion>Protection of audit records and audit data is of critical importance. Cryptographic mechanisms are the industry established s...Rule Low Severity -
SRG-OS-000480
<GroupDescription></GroupDescription>Group -
The sticky bit must be set on all world writable directories.
<VulnDiscussion>Files in directories that have had the "sticky bit" enabled can only be deleted by users that have both write permissions for...Rule Medium Severity -
SRG-OS-000480
<GroupDescription></GroupDescription>Group -
Permissions on user home directories must be 750 or less permissive.
<VulnDiscussion>Group-writable or world-writable user home directories may enable malicious users to steal or modify other users' data or to ...Rule Medium Severity -
SRG-OS-000480
<GroupDescription></GroupDescription>Group -
Permissions on user . (hidden) files must be 750 or less permissive.
<VulnDiscussion>Group-writable or world-writable user configuration files may enable malicious users to steal or modify other users' data or ...Rule Medium Severity -
SRG-OS-000480
<GroupDescription></GroupDescription>Group -
Permissions on user .netrc files must be 750 or less permissive.
<VulnDiscussion>.netrc files may contain unencrypted passwords that can be used to attack other systems.</VulnDiscussion><FalsePosit...Rule Medium Severity -
SRG-OS-000480
<GroupDescription></GroupDescription>Group -
There must be no user .rhosts files.
<VulnDiscussion>Even though the .rhosts files are ineffective if support is disabled in /etc/pam.conf, they may have been brought over from o...Rule High Severity -
SRG-OS-000480
<GroupDescription></GroupDescription>Group -
Groups assigned to users must exist in the /etc/group file.
<VulnDiscussion>Groups defined in passwd but not in group file pose a threat to system security since group permissions are not properly mana...Rule Medium Severity -
SRG-OS-000480
<GroupDescription></GroupDescription>Group -
Users must have a valid home directory assignment.
<VulnDiscussion>All users must be assigned a home directory in the passwd file. Failure to have a home directory may result in the user being...Rule Low Severity -
SRG-OS-000480
<GroupDescription></GroupDescription>Group -
All user accounts must be configured to use a home directory that exists.
<VulnDiscussion>If the user's home directory does not exist, the user will be placed in "/" and will not be able to write any files or have l...Rule Low Severity -
SRG-OS-000480
<GroupDescription></GroupDescription>Group -
All home directories must be owned by the respective user assigned to it in /etc/passwd.
<VulnDiscussion>Since the user is accountable for files stored in the user's home directory, the user must be the owner of the directory.<...Rule Medium Severity -
SRG-OS-000104
<GroupDescription></GroupDescription>Group -
Duplicate User IDs (UIDs) must not exist for users within the organization.
<VulnDiscussion>Users within the organization must be assigned unique UIDs for accountability and to ensure appropriate access protections.&l...Rule Medium Severity -
SRG-OS-000121
<GroupDescription></GroupDescription>Group -
Duplicate UIDs must not exist for multiple non-organizational users.
<VulnDiscussion>Non-organizational users must be assigned unique UIDs for accountability and to ensure appropriate access protections.</Vu...Rule Medium Severity -
SRG-OS-000480
<GroupDescription></GroupDescription>Group -
Duplicate Group IDs (GIDs) must not exist for multiple groups.
<VulnDiscussion>User groups must be assigned unique GIDs for accountability and to ensure appropriate access protections.</VulnDiscussion&...Rule Medium Severity -
SRG-OS-000480
<GroupDescription></GroupDescription>Group -
Reserved UIDs 0-99 must only be used by system accounts.
<VulnDiscussion>If a user is assigned a UID that is in the reserved range, even if it is not presently in use, security exposures can arise i...Rule Medium Severity -
SRG-OS-000480
<GroupDescription></GroupDescription>Group -
Duplicate user names must not exist.
<VulnDiscussion>If a user is assigned a duplicate user name, it will create and have access to files with the first UID for that username in ...Rule Medium Severity -
SRG-OS-000480
<GroupDescription></GroupDescription>Group -
Duplicate group names must not exist.
<VulnDiscussion>If a group is assigned a duplicate group name, it will create and have access to files with the first GID for that group in g...Rule Medium Severity -
SRG-OS-000480
<GroupDescription></GroupDescription>Group -
User .netrc files must not exist.
<VulnDiscussion>The .netrc file presents a significant security risk since it stores passwords in unencrypted form.</VulnDiscussion><...Rule Medium Severity -
SRG-OS-000480
<GroupDescription></GroupDescription>Group -
The system must not allow users to configure .forward files.
<VulnDiscussion>Use of the .forward file poses a security risk in that sensitive data may be inadvertently transferred outside the organizati...Rule Medium Severity -
SRG-OS-000480
<GroupDescription></GroupDescription>Group -
World-writable files must not exist.
<VulnDiscussion>Data in world-writable files can be read, modified, and potentially compromised by any user on the system. World-writable fil...Rule Medium Severity -
SRG-OS-000480
<GroupDescription></GroupDescription>Group -
All valid SUID/SGID files must be documented.
<VulnDiscussion>There are valid reasons for SUID/SGID programs, but it is important to identify and review such programs to ensure they are l...Rule Low Severity -
SRG-OS-000480
<GroupDescription></GroupDescription>Group -
The operating system must have no unowned files.
<VulnDiscussion>A new user who is assigned a deleted user's user ID or group ID may then end up owning these files, and thus have more access...Rule Medium Severity -
SRG-OS-000480
<GroupDescription></GroupDescription>Group -
The operating system must have no files with extended attributes.
<VulnDiscussion>Attackers or malicious users could hide information, exploits, etc. in extended attribute areas. Since extended attributes ar...Rule Low Severity -
SRG-OS-000480
<GroupDescription></GroupDescription>Group -
The root account must be the only account with GID of 0.
<VulnDiscussion>All accounts with a GID of 0 have root group privileges and must be limited to the group account only.</VulnDiscussion>...Rule Medium Severity
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