Red Hat Enterprise Linux 9 Security Technical Implementation Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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SRG-OS-000324-GPOS-00125
<GroupDescription></GroupDescription>Group -
RHEL 9 must prevent users from disabling session control mechanisms.
<VulnDiscussion>The session lock is implemented at the point where session activity can be determined. Rather than be forced to wait for a pe...Rule Low Severity -
SRG-OS-000163-GPOS-00072
<GroupDescription></GroupDescription>Group -
RHEL 9 must automatically exit interactive command shell user sessions after 15 minutes of inactivity.
<VulnDiscussion>Terminating an idle interactive command shell user session within a short time period reduces the window of opportunity for u...Rule Medium Severity -
SRG-OS-000027-GPOS-00008
<GroupDescription></GroupDescription>Group -
RHEL 9 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-000021-GPOS-00005
<GroupDescription></GroupDescription>Group -
RHEL 9 must log username information when unsuccessful logon attempts occur.
<VulnDiscussion>Without auditing of these events, it may be harder or impossible to identify what an attacker did after an attack.</VulnDi...Rule Medium Severity -
SRG-OS-000480-GPOS-00226
<GroupDescription></GroupDescription>Group -
RHEL 9 must enforce a delay of at least four seconds between logon prompts following a failed logon attempt.
<VulnDiscussion>Increasing the time between a failed authentication attempt and reprompting to enter credentials helps to slow a single-threa...Rule Medium Severity -
SRG-OS-000480-GPOS-00228
<GroupDescription></GroupDescription>Group -
RHEL 9 must define default permissions for the bash shell.
<VulnDiscussion>The umask controls the default access mode assigned to newly created files. A umask of 077 limits new files to mode 600 or le...Rule Medium Severity -
SRG-OS-000480-GPOS-00228
<GroupDescription></GroupDescription>Group -
RHEL 9 must define default permissions for the c shell.
<VulnDiscussion>The umask controls the default access mode assigned to newly created files. A umask of 077 limits new files to mode 600 or le...Rule Medium Severity -
SRG-OS-000480-GPOS-00228
<GroupDescription></GroupDescription>Group -
RHEL 9 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-00228
<GroupDescription></GroupDescription>Group -
RHEL 9 must define default permissions for the system default profile.
<VulnDiscussion>The umask controls the default access mode assigned to newly created files. A umask of 077 limits new files to mode 600 or le...Rule Medium Severity -
SRG-OS-000480-GPOS-00227
<GroupDescription></GroupDescription>Group -
RHEL 9 must display the date and time of the last successful account logon upon logon.
<VulnDiscussion>Users need to be aware of activity that occurs regarding their account. Providing users with information regarding the number...Rule Low Severity
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