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V-275579

CAT II (Medium)

Ubuntu OS must have directories that contain system commands set to a mode of "755" or less permissive.

Rule ID

SV-275579r1147787_rule

STIG

Riverbed NetIM OS Security Technical Implementation Guide

Version

V1R1

CCIs

CCI-001495

Discussion

Protecting audit information also includes identifying and protecting the tools used to view and manipulate log data. Therefore, protecting audit tools is necessary to prevent unauthorized operation on audit information. Operating systems providing tools to interface with audit information will leverage user permissions and roles identifying the user accessing the tools and the corresponding rights the user has to make access decisions regarding the deletion of audit tools. Audit tools include, but are not limited to, vendor-provided and open source audit tools needed to successfully view and manipulate audit information system activity and records. Audit tools include custom queries and report generators.

Check Content

Verify the system commands directories have mode "755" or less permissive by using the following command:  
  
     $ find /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 Ubuntu OS commands directories to be protected from unauthorized access. Run the following command:  
  
     $ sudo find /bin /sbin /usr/bin /usr/sbin /usr/local/bin /usr/local/sbin -perm /022 -type d -exec chmod -R 755 '{}' \;