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V-282734

CAT II (Medium)

TOSS 5 must require reauthentication when using the sudo command.

Rule ID

SV-282734r1201182_rule

STIG

Tri-Lab Operating System Stack (TOSS) 5 Security Technical Implementation Guide

Version

V1R1

CCIs

CCI-000366

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 that 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 TOSS 5 requires reauthentication when using the "sudo" command to elevate privileges using 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 TOSS 5 to reauthenticate "sudo" commands after the specified timeout.

Add the following line to "/etc/sudoers":

Defaults timestamp_timeout=0