SV-270707r1101786: Ubuntu 24.04 LTS must require users to reauthenticate for privilege escalation or when changing roles. | Canonical Ubuntu 24.04 LTS STIG SCAP Benchmark

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Assessment Title

Rule Text

Ubuntu 24.04 LTS must require users to reauthenticate for privilege escalation or when changing roles.

Description

Discussion Text

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 user reauthenticate.

How this relates to the STIG checklist: STIG vs SCAP benchmark.

IA Controls

NIST SP 800-53

Not mappedCCI-000366

References

DPMS Target Canonical Ubuntu 24.04 LTS DISA DPMS Target Canonical Ubuntu 24.04 LTS 5673

SCC Automation Reference

The reconstructed evaluation script behind this rule's OVAL check(s) — every module a compound check combines, with this rule's own concrete values and DISA's SCC tool's real per-module mechanism curated from static teardown of SCC releases.

#!/bin/bash
# Reconstructed from oval:mil.disa.stig.ubuntu2404os:def:270707
# Ubuntu 24.04 LTS must require users to reauthenticate for privilege escalation or when changing roles.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# '!authenticate' found in /etc/sudoers
# textfilecontent54_object (textfilecontent54_test)
test_1() {
  grep -Pq '(?i)!authenticate' '/etc/sudoers' &>/dev/null
}
# '!authenticate' found in /etc/sudoers.d
# textfilecontent54_object (textfilecontent54_test)
test_2() {
  grep -rqP --include='*' '(?i)!authenticate' '/etc/sudoers.d' &>/dev/null
}

if ( test_1 && test_2 ); then
  echo "PASS"
else
  echo "FAIL"
fi

Assessment Script Powered by AISandbox-executed

A standalone Shell script to assess this control automatically. Review before running it in your environment.

Syntax-checked and actually executed in an isolated sandbox (not the real system this checks) — confirmed to run without errors.

#!/bin/sh
# OVAL Definition: oval:mil.disa.stig.ubuntu2404os:def:270707

if [ ! -f "/etc/sudoers" ] || grep -iq "!authenticate" /etc/sudoers | grep -q . ; then echo "FAIL"; exit 1; fi
for file in /etc/sudoers.d/*; do
    if [ -f "$file" ] && grep -iq "!authenticate" "$file" | grep -q .; then echo "FAIL"; exit 1; fi
done
echo "PASS"; exit 0

Remediation

Remove any occurrence of "!authenticate" found in "/etc/sudoers" file or files in the "/etc/sudoers.d" directory.