<?xml version='1.0' encoding='utf-8'?>
<oval-def:oval_definitions xmlns:ind="http://oval.mitre.org/XMLSchema/oval-definitions-5#independent" xmlns:linux="http://oval.mitre.org/XMLSchema/oval-definitions-5#linux" xmlns:oval="http://oval.mitre.org/XMLSchema/oval-common-5" xmlns:oval-def="http://oval.mitre.org/XMLSchema/oval-definitions-5" xmlns:unix="http://oval.mitre.org/XMLSchema/oval-definitions-5#unix" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://oval.mitre.org/XMLSchema/oval-common-5 oval-common-schema.xsd  http://oval.mitre.org/XMLSchema/oval-definitions-5 oval-definitions-schema.xsd  http://oval.mitre.org/XMLSchema/oval-definitions-5#independent independent-definitions-schema.xsd  http://oval.mitre.org/XMLSchema/oval-definitions-5#unix unix-definitions-schema.xsd  http://oval.mitre.org/XMLSchema/oval-definitions-5#linux linux-definitions-schema.xsd">
  <oval-def:generator>
    <oval:product_name>OVALFileLinker from SCAP Security Guide</oval:product_name>
    <oval:product_version>ssg: [0, 1, 80], python: 3.10.12</oval:product_version>
    <oval:schema_version>5.11.2</oval:schema_version>
    <oval:timestamp>2026-01-26T22:10:23</oval:timestamp>
  </oval-def:generator>
  <oval-def:definitions>
    <oval-def:definition id="oval:ssg-file_permissions_ungroupowned:def:1" version="2" class="compliance">
      <oval-def:metadata>
        <oval-def:title>Ensure All Files Are Owned by a Group</oval-def:title>
        <oval-def:affected family="unix">
          <oval-def:platform>Ubuntu 22.04</oval-def:platform>
        </oval-def:affected>
        <oval-def:reference ref_id="file_permissions_ungroupowned" source="ssg" />
        <oval-def:description>All files should be owned by a group</oval-def:description>
      </oval-def:metadata>
      <oval-def:criteria operator="OR">
        <oval-def:criteria operator="AND">
          <oval-def:criteria negate="true" operator="AND">
            <oval-def:criterion comment="The /etc/nsswitch.conf uses nss-altfiles" test_ref="oval:ssg-test_file_permissions_ungroupowned_nsswitch_uses_altfiles:tst:1" />
            <oval-def:criterion comment="Check if nss-altfiles package is installed" test_ref="oval:ssg-test_file_permissions_ungroupowned_package_nss-altfiles_installed:tst:1" />
          </oval-def:criteria>
          <oval-def:criterion comment="Check all local files and make sure they are owned by a group" test_ref="oval:ssg-test_file_permissions_ungroupowned:tst:1" />
        </oval-def:criteria>
        <oval-def:criteria operator="AND">
          <oval-def:criteria operator="AND">
            <oval-def:criterion comment="The /etc/nsswitch.conf uses nss-altfiles" test_ref="oval:ssg-test_file_permissions_ungroupowned_nsswitch_uses_altfiles:tst:1" />
            <oval-def:criterion comment="Check if nss-altfiles package is installed" test_ref="oval:ssg-test_file_permissions_ungroupowned_package_nss-altfiles_installed:tst:1" />
          </oval-def:criteria>
          <oval-def:criterion comment="Check all local files and make sure they are owned by a group" test_ref="oval:ssg-test_file_permissions_ungroupowned_with_usrlib:tst:1" />
        </oval-def:criteria>
      </oval-def:criteria>
    </oval-def:definition>
  </oval-def:definitions>
  <oval-def:tests>
    <ind:textfilecontent54_test id="oval:ssg-test_file_permissions_ungroupowned_nsswitch_uses_altfiles:tst:1" version="1" check="all" comment="Test if /etc/nssswitch.conf contains 'altfiles' in 'group' key" state_operator="AND">
      <ind:object object_ref="oval:ssg-object_file_permissions_ungroupowned_nsswitch_uses_altfiles:obj:1" />
      <ind:state state_ref="oval:ssg-state_file_permissions_ungroupowned_nsswitch_uses_altfiles:ste:1" />
    </ind:textfilecontent54_test>
    <linux:dpkginfo_test id="oval:ssg-test_file_permissions_ungroupowned_package_nss-altfiles_installed:tst:1" version="1" check="all" comment="package nss-altfiles is installed" check_existence="all_exist" state_operator="AND">
      <linux:object object_ref="oval:ssg-obj_test_file_permissions_ungroupowned_package_nss-altfiles_installed:obj:1" />
    </linux:dpkginfo_test>
    <unix:file_test id="oval:ssg-test_file_permissions_ungroupowned:tst:1" version="1" check="all" comment="there are no files with group owner different than local groups" check_existence="none_exist" state_operator="AND">
      <unix:object object_ref="oval:ssg-object_file_permissions_ungroupowned:obj:1" />
    </unix:file_test>
    <unix:file_test id="oval:ssg-test_file_permissions_ungroupowned_with_usrlib:tst:1" version="1" check="all" comment="there are no files with group owner different than local groups" check_existence="none_exist" state_operator="AND">
      <unix:object object_ref="oval:ssg-object_file_permissions_ungroupowned_with_usrlib:obj:1" />
    </unix:file_test>
  </oval-def:tests>
  <oval-def:objects>
    <ind:textfilecontent54_object id="oval:ssg-object_etc_group:obj:1" version="1">
      <ind:filepath>/etc/group</ind:filepath>
      <ind:pattern operation="pattern match">^[^:]+:[^:]*:([\d]+):[^:]*$</ind:pattern>
      <ind:instance operation="greater than or equal" datatype="int">1</ind:instance>
    </ind:textfilecontent54_object>
    <ind:textfilecontent54_object id="oval:ssg-object_usr_lib_group:obj:1" version="1">
      <ind:filepath>/usr/lib/group</ind:filepath>
      <ind:pattern operation="pattern match">^[^:]+:[^:]*:([\d]+):[^:]*$</ind:pattern>
      <ind:instance operation="greater than or equal" datatype="int">1</ind:instance>
    </ind:textfilecontent54_object>
    <ind:textfilecontent54_object id="oval:ssg-object_all_gids_with_usrlib:obj:1" version="1">
      <oval-def:set>
        <oval-def:object_reference>oval:ssg-object_etc_group:obj:1</oval-def:object_reference>
        <oval-def:object_reference>oval:ssg-object_usr_lib_group:obj:1</oval-def:object_reference>
      </oval-def:set>
    </ind:textfilecontent54_object>
    <linux:partition_object id="oval:ssg-object_file_permissions_ungroupowned_local_partitions:obj:1" version="1">
      <linux:mount_point operation="pattern match">.*</linux:mount_point>
      <oval-def:filter action="include">oval:ssg-state_file_permissions_ungroupowned_dev_partitons:ste:1</oval-def:filter>
    </linux:partition_object>
    <unix:file_object id="oval:ssg-object_file_permissions_ungroupowned:obj:1" version="2" comment="all local files without a known group owner">
      <unix:behaviors recurse="directories" recurse_direction="down" recurse_file_system="defined" max_depth="-1" />
      <unix:path operation="equals" var_check="at least one" var_ref="oval:ssg-var_file_permissions_ungroupowned_local_mountpoints:var:1" />
      <unix:filename operation="pattern match">.*</unix:filename>
      <oval-def:filter action="exclude">oval:ssg-state_file_permissions_ungroupowned_local_group_owner:ste:1</oval-def:filter>
      <oval-def:filter action="exclude">oval:ssg-state_file_permissions_ungroupowned_sysroot:ste:1</oval-def:filter>
    </unix:file_object>
    <unix:file_object id="oval:ssg-object_file_permissions_ungroupowned_with_usrlib:obj:1" version="2" comment="all local files without a known group owner">
      <unix:behaviors recurse="directories" recurse_direction="down" recurse_file_system="defined" max_depth="-1" />
      <unix:path operation="equals" var_check="at least one" var_ref="oval:ssg-var_file_permissions_ungroupowned_local_mountpoints:var:1" />
      <unix:filename operation="pattern match">.*</unix:filename>
      <oval-def:filter action="exclude">oval:ssg-state_file_permissions_ungroupowned_local_group_owner_with_usrlib:ste:1</oval-def:filter>
      <oval-def:filter action="exclude">oval:ssg-state_file_permissions_ungroupowned_sysroot:ste:1</oval-def:filter>
    </unix:file_object>
    <ind:textfilecontent54_object id="oval:ssg-object_file_permissions_ungroupowned_nsswitch_uses_altfiles:obj:1" version="1">
      <ind:filepath>/etc/nsswitch.conf</ind:filepath>
      <ind:pattern operation="pattern match">^\s*group:\s+(.*)$</ind:pattern>
      <ind:instance operation="greater than or equal" datatype="int">1</ind:instance>
    </ind:textfilecontent54_object>
    <linux:dpkginfo_object id="oval:ssg-obj_test_file_permissions_ungroupowned_package_nss-altfiles_installed:obj:1" version="1">
      <linux:name>nss-altfiles</linux:name>
    </linux:dpkginfo_object>
  </oval-def:objects>
  <oval-def:states>
    <unix:file_state id="oval:ssg-state_file_permissions_ungroupowned_local_group_owner:ste:1" version="1" operator="AND" comment="Used to filter out all files group-owned by a group defined in /etc/group">
      <unix:group_id datatype="int" var_check="at least one" var_ref="oval:ssg-var_all_local_gids:var:1" />
    </unix:file_state>
    <unix:file_state id="oval:ssg-state_file_permissions_ungroupowned_local_group_owner_with_usrlib:ste:1" version="1" operator="AND" comment="Used to filter out all files group-owned by a group defined in /etc/group">
      <unix:group_id datatype="int" var_check="at least one" var_ref="oval:ssg-var_all_local_gids_with_usrlib:var:1" />
    </unix:file_state>
    <unix:file_state id="oval:ssg-state_file_permissions_ungroupowned_sysroot:ste:1" version="1" operator="AND" comment="Used to filter out all files in the /sysroot directory">
      <unix:filepath operation="pattern match">^/sysroot/.*$</unix:filepath>
    </unix:file_state>
    <linux:partition_state id="oval:ssg-state_file_permissions_ungroupowned_dev_partitons:ste:1" version="1" operator="AND">
      <linux:device operation="pattern match">^/dev/.*$</linux:device>
    </linux:partition_state>
    <ind:textfilecontent54_state id="oval:ssg-state_file_permissions_ungroupowned_nsswitch_uses_altfiles:ste:1" version="1" operator="AND">
      <ind:subexpression operation="pattern match">altfiles</ind:subexpression>
    </ind:textfilecontent54_state>
  </oval-def:states>
  <oval-def:variables>
    <oval-def:local_variable id="oval:ssg-var_all_local_gids:var:1" version="1" datatype="int" comment="all GIDs extracted from /etc/group on the target system">
      <oval-def:object_component object_ref="oval:ssg-object_etc_group:obj:1" item_field="subexpression" />
    </oval-def:local_variable>
    <oval-def:local_variable id="oval:ssg-var_all_local_gids_with_usrlib:var:1" version="1" datatype="int" comment="all GIDs extracted from /etc/group on the target system">
      <oval-def:object_component object_ref="oval:ssg-object_all_gids_with_usrlib:obj:1" item_field="subexpression" />
    </oval-def:local_variable>
    <oval-def:local_variable id="oval:ssg-var_file_permissions_ungroupowned_local_mountpoints:var:1" version="1" datatype="string" comment="Mount points for local devices">
      <oval-def:object_component item_field="mount_point" object_ref="oval:ssg-object_file_permissions_ungroupowned_local_partitions:obj:1" />
    </oval-def:local_variable>
  </oval-def:variables>
</oval-def:oval_definitions>