Title

TOSS 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 egrep -ir 'timestamp_timeout' /etc/sudoers /etc/sudoers.d /etc/sudoers:Defaults timestamp_timeout=0 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=0

Additional Identifiers

Rule ID: SV-252931r824117_rule

Vulnerability ID: V-252931

Group Title: SRG-OS-000373-GPOS-00158

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.