Check: RHEL-09-432015
RHEL 9 STIG:
RHEL-09-432015
(in version v2 r3)
Title
RHEL 9 must require reauthentication when using the "sudo" command. (Cat II impact)
Discussion
Without reauthentication, users may access resources or perform tasks for which they do not have authorization. When operating systems provide the capability to escalate a functional capability, it is critical the organization requires the user to reauthenticate when using the "sudo" command. If the value is set to an integer less than "0", the user's time stamp will not expire and the user will not have to reauthenticate for privileged actions until the user's session is terminated.
Check Content
Verify RHEL 9 requires reauthentication when using the "sudo" command to elevate privileges with the following command: $ sudo grep -ir 'timestamp_timeout' /etc/sudoers /etc/sudoers.d/ /etc/sudoers:Defaults timestamp_timeout=0 If results are returned from more than one file location, this is a finding. If "timestamp_timeout" is set to a negative number, is commented out, or no results are returned, this is a finding.
Fix Text
Configure RHEL 9 to reauthenticate "sudo" commands after the specified timeout: Add the following line to "/etc/sudoers" or a file in "/etc/sudoers.d": Defaults timestamp_timeout=0
Additional Identifiers
Rule ID: SV-258084r1050789_rule
Vulnerability ID: V-258084
Group Title: SRG-OS-000373-GPOS-00156
Expert Comments
CCIs
| Number | Definition |
|---|---|
| CCI-002038 |
The organization requires users to reauthenticate upon organization-defined circumstances or situations requiring reauthentication. |
| CCI-004895 |
Permit users to invoke the trusted communications path for communications between the user and the organization-defined security functions, including at a minimum, authentication and re-authentication. |
Controls
| Number | Title |
|---|---|
| IA-11 |
Re-authentication |