Check: RHEL-08-010384
RHEL 8 STIG:
RHEL-08-010384
(in versions v2 r1 through v1 r7)
Title
RHEL 8 must require re-authentication when using the "sudo" command. (Cat II impact)
Discussion
Without re-authentication, 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 re-authenticate 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 re-authenticate for privileged actions until the user's session is terminated.
Check Content
Verify the operating system requires re-authentication when using the "sudo" command to elevate privileges. $ sudo grep -ir 'timestamp_timeout' /etc/sudoers /etc/sudoers.d /etc/sudoers:Defaults timestamp_timeout=0 If conflicting results are returned, 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 the "sudo" command to require re-authentication. Edit the /etc/sudoers file: $ sudo visudo Add or modify the following line: Defaults timestamp_timeout=[value] Note: The "[value]" must be a number that is greater than or equal to "0". Remove any duplicate or conflicting lines from /etc/sudoers and /etc/sudoers.d/ files.
Additional Identifiers
Rule ID: SV-237643r1017325_rule
Vulnerability ID: V-237643
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 |