Red Hat Enterprise Linux 8 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 -
All RHEL 8 local files and directories must 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 -
All RHEL 8 local files and directories must 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 -
A separate RHEL 8 filesystem must be 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 Medium Severity -
SRG-OS-000480-GPOS-00229
<GroupDescription></GroupDescription>Group -
Unattended or automatic logon via the RHEL 8 graphical user interface must not be allowed.
<VulnDiscussion>Failure to restrict system access to authenticated users negatively impacts operating system security.</VulnDiscussion>...Rule High Severity -
SRG-OS-000480-GPOS-00229
<GroupDescription></GroupDescription>Group -
RHEL 8 must not allow users to override SSH environment variables.
<VulnDiscussion>SSH environment options potentially allow users to bypass access restriction in some configurations.</VulnDiscussion>&l...Rule Medium Severity -
SRG-OS-000002-GPOS-00002
<GroupDescription></GroupDescription>Group -
RHEL 8 temporary user accounts must be provisioned with an expiration time of 72 hours or less.
<VulnDiscussion>If temporary user accounts remain active when no longer needed or for an excessive period, these accounts may be used to gain...Rule Medium Severity -
SRG-OS-000021-GPOS-00005
<GroupDescription></GroupDescription>Group -
RHEL 8 must automatically lock an account when three unsuccessful logon attempts occur.
<VulnDiscussion>By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise...Rule Medium Severity -
SRG-OS-000021-GPOS-00005
<GroupDescription></GroupDescription>Group -
RHEL 8 must automatically lock an account when three unsuccessful logon attempts occur.
<VulnDiscussion>By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise...Rule Medium Severity -
SRG-OS-000021-GPOS-00005
<GroupDescription></GroupDescription>Group -
RHEL 8 must automatically lock an account when three unsuccessful logon attempts occur during a 15-minute time period.
<VulnDiscussion>By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise...Rule Medium Severity -
SRG-OS-000021-GPOS-00005
<GroupDescription></GroupDescription>Group -
RHEL 8 must automatically lock an account when three unsuccessful logon attempts occur during a 15-minute time period.
<VulnDiscussion>By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise...Rule Medium Severity -
SRG-OS-000021-GPOS-00005
<GroupDescription></GroupDescription>Group -
RHEL 8 must automatically lock an account until the locked account is released by an administrator when three unsuccessful logon attempts occur during a 15-minute time period.
<VulnDiscussion>By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise...Rule Medium Severity -
SRG-OS-000021-GPOS-00005
<GroupDescription></GroupDescription>Group -
RHEL 8 must automatically lock an account until the locked account is released by an administrator when three unsuccessful logon attempts occur during a 15-minute time period.
<VulnDiscussion>By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise...Rule Medium Severity -
SRG-OS-000021-GPOS-00005
<GroupDescription></GroupDescription>Group -
RHEL 8 must ensure account lockouts persist.
<VulnDiscussion>By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise...Rule Medium Severity -
SRG-OS-000021-GPOS-00005
<GroupDescription></GroupDescription>Group -
RHEL 8 must ensure account lockouts persist.
<VulnDiscussion>By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise...Rule Medium Severity -
SRG-OS-000021-GPOS-00005
<GroupDescription></GroupDescription>Group -
RHEL 8 must prevent system messages from being presented when three unsuccessful logon attempts occur.
<VulnDiscussion>By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise...Rule Medium Severity -
SRG-OS-000021-GPOS-00005
<GroupDescription></GroupDescription>Group -
RHEL 8 must prevent system messages from being presented when three unsuccessful logon attempts occur.
<VulnDiscussion>By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise...Rule Medium Severity -
SRG-OS-000021-GPOS-00005
<GroupDescription></GroupDescription>Group -
RHEL 8 must log user name information when unsuccessful logon attempts occur.
<VulnDiscussion>By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise...Rule Medium Severity -
SRG-OS-000021-GPOS-00005
<GroupDescription></GroupDescription>Group -
RHEL 8 must log user name information when unsuccessful logon attempts occur.
<VulnDiscussion>By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise...Rule Medium Severity -
SRG-OS-000021-GPOS-00005
<GroupDescription></GroupDescription>Group -
RHEL 8 must include root when automatically locking an account until the locked account is released by an administrator when three unsuccessful logon attempts occur during a 15-minute time period.
<VulnDiscussion>By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise...Rule Medium Severity -
SRG-OS-000021-GPOS-00005
<GroupDescription></GroupDescription>Group -
RHEL 8 must include root when automatically locking an account until the locked account is released by an administrator when three unsuccessful logon attempts occur during a 15-minute time period.
<VulnDiscussion>By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise...Rule Medium Severity -
SRG-OS-000027-GPOS-00008
<GroupDescription></GroupDescription>Group -
RHEL 8 must limit the number of concurrent sessions to ten for all accounts and/or account types.
<VulnDiscussion>Operating system management includes the ability to control the number of users and user sessions that utilize an operating s...Rule Low Severity -
SRG-OS-000028-GPOS-00009
<GroupDescription></GroupDescription>Group -
RHEL 8 must enable a user session lock until that user re-establishes access using established identification and authentication procedures for graphical user sessions.
<VulnDiscussion>A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the ...Rule Medium Severity -
SRG-OS-000028-GPOS-00009
<GroupDescription></GroupDescription>Group -
RHEL 8 must enable a user session lock until that user re-establishes access using established identification and authentication procedures for command line sessions.
<VulnDiscussion>A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the ...Rule Medium Severity -
SRG-OS-000028-GPOS-00009
<GroupDescription></GroupDescription>Group -
RHEL 8 must ensure session control is automatically started at shell initialization.
<VulnDiscussion>Tmux is a terminal multiplexer that enables a number of terminals to be created, accessed, and controlled from a single scree...Rule Medium Severity -
SRG-OS-000028-GPOS-00009
<GroupDescription></GroupDescription>Group -
RHEL 8 must prevent users from disabling session control mechanisms.
<VulnDiscussion>A session lock is a temporary action taken when a user stops work and moves away from the immediate physical vicinity of the ...Rule Low Severity
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