Title

Ubuntu OS must have system commands group-owned by "root" or a system account. (Cat II impact)

Discussion

If Ubuntu OS were to allow any user to make changes to software libraries, then those changes could be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process. This requirement applies to Ubuntu OS with software libraries that are accessible and configurable, as in the case of interpreted languages. Software libraries also include privileged programs that execute with escalated privileges. Only qualified and authorized individuals must be allowed to obtain access to information system components for purposes of initiating changes, including upgrades and modifications.

Check Content

Verify the system commands contained in the following directories are group-owned by "root" or a required system account by using the following command: $ sudo find -L /bin /sbin /usr/bin /usr/sbin /usr/local/bin /usr/local/sbin ! -group root -type f ! -perm /2000 -exec stat -c "%n %G" '{}' \; If any system commands are returned that are not Set Group ID upon execution (SGID) files and group-owned by a required system account, this is a finding.

Fix Text

Configure Ubuntu OS commands to be protected from unauthorized access. Run the following command, replacing "<command_name>" with any system command not group-owned by "root" or a required system account: $ sudo chgrp root <command_name>

Additional Identifiers

Rule ID: SV-275590r1147820_rule

Vulnerability ID: V-275590

Group Title: SRG-OS-000259-GPOS-00100

Expert Comments

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