BaselineWatch
Desk
Your fleet and your work Fleetyour releases and the hardware they run onTriagewhat needs a decisionWatchlistthe products and platforms you runSaved searchesthe lists you come back to
This instance Sourceswhat is read, how often, under what termsDigestthe daily or weekly summary, and alerts
How it is drawn Appearancethe look and the colour schemeBrandingthe mark this instance wears
Owner sign-in

UBTU-24-700020 Ubuntu 24.04 LTS must generate system journal entries without revealing information that could be exploited by adversaries.

DISA STIG library V1R7
All changes in this version
first version loaded CAT II

Maps to SI-11 via CCI-001312

Title

Ubuntu 24.04 LTS must generate system journal entries without revealing information that could be exploited by adversaries.

Control

Verify the /run/log/journal and /var/log/journal directories have permissions set to default values with the following command: $ sudo find /run/log/journal /var/log/journal -type d -exec stat -c "%n %a" {} \; /run/log/journal 2755 /var/log/journal 2755 /var/log/journal/6a52424faa6e480ea5fc7346b9345792 2755 If any output returned has a permission set greater than 2755, this is a finding. Verify all files in the /run/log/journal and /var/log/journal directories have permissions set to "640" or less permissive with the following command: $ sudo find /run/log/journal /var/log/journal -type f -exec stat -c "%n %a" {} \; /var/log/journal/d5745ad455d34fb8b6f78be37c1fcd3e/system.journal 640 /var/log/journal/d5745ad455d34fb8b6f78be37c1fcd3e/[email protected]~ 640 /var/log/journal/d5745ad455d34fb8b6f78be37c1fcd3e/[email protected]~ 640 /var/log/journal/d5745ad455d34fb8b6f78be37c1fcd3e/[email protected]~ 640 /var/log/journal/d5745ad455d34fb8b6f78be37c1fcd3e/user-1000.journal 640 If any output returned has a permission set greater than "640", this is a finding.

Discussion

Any operating system providing too much information in error messages risks compromising the data and security of the structure, and content of error messages must be carefully considered by the organization. Organizations carefully consider the structure/content of error messages. The extent to which information systems are able to identify and handle error conditions is guided by organizational policy and operational requirements. Information that could be exploited by adversaries includes, for example, erroneous logon attempts with passwords entered by mistake as the username, mission/business information that can be derived from (if not stated explicitly by) information recorded, and personal information, such as account numbers, social security numbers, and credit card numbers.

Related controls

CCI-001312

Fix

Configure the system to set the appropriate permissions to the files and directories used by the systemd journal. Create a drop-in file if it does not already exist with the following command: $ sudo vi /etc/tmpfiles.d/zzz-systemd-stig.conf Add or modify the following lines in the "/usr/lib/tmpfiles.d/zzz-systemd-stig.conf" file: z /run/log/journal 2755 root systemd-journal - - Z /run/log/journal/%m ~2750 root systemd-journal - - z /var/log/journal 2755 root systemd-journal - - z /var/log/journal/%m 2755 root systemd-journal - - z /var/log/journal/%m/system.journal 0640 root systemd-journal - - Note: Restart the system for these settings to take effect.