Title

The Ubuntu operating system must have directories that contain system commands set to a mode of 0755 or less permissive. (Cat II impact)

Discussion

If the Ubuntu operating system were to allow any user to make changes to software libraries, then those changes might be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process. This requirement applies to Ubuntu operating systems with software libraries that are accessible and configurable, as in the case of interpreted languages. Software libraries also include privileged programs which 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 directories have mode 0755 or less permissive: /bin /sbin /usr/bin /usr/sbin /usr/local/bin /usr/local/sbin Check that the system command directories have mode 0755 or less permissive with the following command: # find -L /bin /sbin /usr/bin /usr/sbin /usr/local/bin /usr/local/sbin -perm /022 -type d -exec stat -c "%n %a" '{}' \; If any directories are found to be group-writable or world-writable, this is a finding.

Fix Text

Configure the system commands directories to be protected from unauthorized access. Run the following command: # sudo find -L /bin /sbin /usr/bin /usr/sbin /usr/local/bin /usr/local/sbin -perm /022 -type d -exec chmod -R 755 '{}' \;

Additional Identifiers

Rule ID: SV-219205r610963_rule

Vulnerability ID: V-219205

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

Expert Comments

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