From Canonical Ubuntu 16.04 LTS Security Technical Implementation Guide
Part of SRG-OS-000259-GPOS-00100
Associated with: CCI-001499
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.
Verify the system commands contained in the following directories have mode "0755" or less permissive. Check that the system command files contained in the following 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 | xargs ls -la If any system commands are found to be group-writable or world-writable, this is a finding.
Configure the system commands to be protected from unauthorized access. Run the following command, replacing "[FILE]" with any system command with a mode more permissive than "0755". # sudo chmod 0755 [FILE]
Lavender hyperlinks in small type off to the right (of CSS
class id
, if you view the page source) point to
globally unique URIs for each document and item. Copy the
link location and paste anywhere you need to talk
unambiguously about these things.
You can obtain data about documents and items in other
formats. Simply provide an HTTP header Accept:
text/turtle
or
Accept: application/rdf+xml
.
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