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The sudo command must require authentication.


Overview

Finding ID Version Rule ID IA Controls Severity
V-58901 RHEL-06-000529 SV-73331r1_rule Medium
Description
The "sudo" command allows authorized users to run programs (including shells) as other users, system users, and root. The "/etc/sudoers" file is used to configure authorized "sudo" users as well as the programs they are allowed to run. Some configuration options in the "/etc/sudoers" file allow configured users to run programs without re-authenticating. Use of these configuration options makes it easier for one compromised account to be used to compromise other accounts.
STIG Date
Red Hat Enterprise Linux 6 Security Technical Implementation Guide 2015-05-26

Details

Check Text ( C-59747r1_chk )
Verify neither the "NOPASSWD" option nor the "!authenticate" option is configured for use in "/etc/sudoers" and associated files. Note that the "#include" and "#includedir" directives may be used to include configuration data from locations other than the defaults enumerated here.

# egrep '^[^#]*NOPASSWD' /etc/sudoers /etc/sudoers.d/*
# egrep '^[^#]*!authenticate' /etc/sudoers /etc/sudoers.d/*

If the "NOPASSWD" or "!authenticate" options are configured for use in "/etc/sudoers" or associated files, this is a finding.
Fix Text (F-64285r1_fix)
Update the "/etc/sudoers" or other sudo configuration files to remove or comment out lines utilizing the "NOPASSWD" and "!authenticate" options.

# visudo
# visudo -f [other sudo configuration file]