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Ubuntu 24.04 LTS must generate error messages that provide information necessary for corrective actions without revealing information that could be exploited by adversaries.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-270756UBTU-24-700010SV-270756r1134814_ruleCCI-001312medium
Description
Any operating system providing too much information in error messages risks compromising the data and security of the structure, and organizations must carefully consider the content and structure 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. The /var/log/btmp, /var/log/wtmp, and /var/log/lastlog files have group write and global read permissions to allow for the lastlog function to perform. Limiting the permissions beyond this configuration will result in the failure of functions that rely on the lastlog database. Additionally, Canonical recommends excluding the history.log and eipp.log.xz from consideration in this check.
STIGDate
Canonical Ubuntu 24.04 LTS Security Technical Implementation Guide2026-05-14

Related Frameworks

1 mapping across 3 frameworks
SCF0 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

TDA-19Error Handling
1.00
NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (19) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

AC-17(1)Monitoring and Control
1.00
AC-6(9)Log Use of Privileged Functions
1.00
AU-10Non-repudiation
1.00
AU-12Audit Record Generation
1.00
AU-14(1)System Start-up
1.00
AU-3Content of Audit Records
1.00
AU-3(1)Additional Audit Information
1.00
AU-9Protection of Audit Information
1.00
CM-3(5)Automated Security Response
1.00
CM-5(1)Automated Access Enforcement and Audit Records
1.00

+9 more (top 10 by confidence shown)

CCI1 mapping
CCI-001312
1.00

Details

Check Text (C-270756r1134814_chk)

Verify Ubuntu 24.04 LTS has all system log files under the /var/log directory with a permission set to "640" or less permissive with the following command: Note: The btmp, wtmp, lastlog, history, and eipp.log.xz files are excluded from this check. Refer to the Discussion for details. $ sudo find /var/log -perm /137 ! -name '*[bw]tmp' ! -name '*lastlog' -type f -exec stat -c "%n %a" {} \; If the command displays any output, this is a finding.

Fix Text (F-74690r1134813_fix)

Configure Ubuntu 24.04 LTS to set permissions of all log files under the /var/log directory to "640" or more restricted by using the following command: Note: The btmp, wtmp, lastlog, history, and eipp.log.xz files are excluded. Refer to the Discussion for details. $ sudo find /var/log -perm /137 ! -name '*[bw]tmp' ! -name '*lastlog' -type f -exec chmod 640 '{}' \;