Based on comments and recommendations from the following thread, I've submitted a patch to fix CCE-27032-2 no_files_unowned_by_user.xml https://lists.fedorahosted.org/pipermail/scap-security-guide/2013-July/00362...
This only checks /etc/passwd and not any other authorization databases.
8<====================
From ab80797697bdf00c5e05caf150124df67e0a9a51 Mon Sep 17 00:00:00 2001
From: Rodney Mercer rmercer@harris.com Date: Wed, 18 Dec 2013 15:01:25 +0000 Subject: [PATCH] Modified no_files_unowned_by_user.xml modified completely broken no_files_unowned_by_user.xml to properly check all files on the system to make sure that they are owned by a user that resides in /etc/passwd.
--- RHEL6/input/checks/no_files_unowned_by_user.xml | 51 ++++++++++++---------- 1 files changed, 28 insertions(+), 23 deletions(-)
diff --git a/RHEL6/input/checks/no_files_unowned_by_user.xml b/RHEL6/input/checks/no_files_unowned_by_user.xml index a73183a..f3f1276 100644 --- a/RHEL6/input/checks/no_files_unowned_by_user.xml +++ b/RHEL6/input/checks/no_files_unowned_by_user.xml @@ -1,38 +1,43 @@ <def-group> - <definition class="compliance" - id="no_files_unowned_by_user" version="1"> + <definition class="compliance" id="no_files_unowned_by_user" version="1"> <metadata> <title>Find files unowned by a user</title> <affected family="unix"> <platform>Red Hat Enterprise Linux 6</platform> </affected> - <description>All files should be owned by a - user</description> + <description>All files should be owned by a user</description> + <reference source="rmercer" ref_id="20131218" ref_url="test_attestation" /> </metadata> <criteria> - <criterion comment="Check all files and make sure they are owned by a user" - negate="true" - test_ref="test_20050" /> + <criterion comment="Check all files and make sure they are owned by a user" test_ref="no_files_unowned_by_user_test" /> </criteria> </definition> - <unix:file_test xmlns:unix="http://oval.mitre.org/XMLSchema/oval-definitions-5#unix" - check="all" comment="files with no user owner" - id="test_20050" version="1"> - <notes> - <note>This will enumerate all files on local - partitions</note> - </notes> - <unix:object object_ref="obj_20022" /> - <unix:state state_ref="state_20050" /> - </unix:file_test> - <unix:file_state comment="Executables with suid set" - id="state_20050" version="1"> - <unix:user_id datatype="int">0</unix:user_id> + + <unix:file_state id="file_permissions_unowned_userid_list_match" version="1"> + <unix:user_id var_check="at least one" var_ref="file_permissions_unowned_userid_list" datatype="int" /> </unix:file_state> - <unix:file_object comment="all local files" - id="obj_20022" version="1"> - <unix:behaviors recurse="symlinks and directories" recurse_file_system="local" /> + + <local_variable id="file_permissions_unowned_userid_list" comment="List of valid user ids" datatype="int" version="1"> + <object_component item_field="subexpression" object_ref="file_permissions_unowned_userid_list_object" /> + </local_variable> + + <ind:textfilecontent54_object id="file_permissions_unowned_userid_list_object" version="1"> + ind:filepath/etc/passwd</ind:filepath> + <ind:pattern operation="pattern match">^[^:]+:[^:]+:([\d]+):[\d]+:[^:]*:[^:]+:[^:]*$</ind:pattern> + <ind:instance operation="greater than or equal" datatype="int">1</ind:instance> + </ind:textfilecontent54_object> + + <unix:file_object comment="all local files" id="file_permissions_unowned_object" version="1"> + <unix:behaviors recurse="symlinks and directories" recurse_direction="down" recurse_file_system="local" /> unix:path/</unix:path> <unix:filename operation="pattern match">.*</unix:filename> + <filter action="exclude">file_permissions_unowned_userid_list_match</filter> </unix:file_object> + + <unix:file_test xmlns:unix="http://oval.mitre.org/XMLSchema/oval-definitions-5#unix" + check="all" check_existence="none_exist" comment="Check user ids on all files on the system" + id="no_files_unowned_by_user_test" version="1"> + <unix:object object_ref="file_permissions_unowned_object" /> + </unix:file_test> </def-group> +
On 12/18/13, 10:45 AM, Rodney L. Mercer wrote:
Based on comments and recommendations from the following thread, I've submitted a patch to fix CCE-27032-2 no_files_unowned_by_user.xml https://lists.fedorahosted.org/pipermail/scap-security-guide/2013-July/00362...
This only checks /etc/passwd and not any other authorization databases.
8<====================
From ab80797697bdf00c5e05caf150124df67e0a9a51 Mon Sep 17 00:00:00 2001
From: Rodney Mercerrmercer@harris.com Date: Wed, 18 Dec 2013 15:01:25 +0000 Subject: [PATCH] Modified no_files_unowned_by_user.xml modified completely broken no_files_unowned_by_user.xml to properly check all files on the system to make sure that they are owned by a user that resides in /etc/passwd.
RHEL6/input/checks/no_files_unowned_by_user.xml | 51 ++++++++++++---------- 1 files changed, 28 insertions(+), 23 deletions(-)
diff --git a/RHEL6/input/checks/no_files_unowned_by_user.xml b/RHEL6/input/checks/no_files_unowned_by_user.xml index a73183a..f3f1276 100644 --- a/RHEL6/input/checks/no_files_unowned_by_user.xml +++ b/RHEL6/input/checks/no_files_unowned_by_user.xml @@ -1,38 +1,43 @@
<def-group> - <definition class="compliance" - id="no_files_unowned_by_user" version="1"> + <definition class="compliance" id="no_files_unowned_by_user" version="1"> <metadata> <title>Find files unowned by a user</title> <affected family="unix"> <platform>Red Hat Enterprise Linux 6</platform> </affected> - <description>All files should be owned by a - user</description> + <description>All files should be owned by a user</description> + <reference source="rmercer" ref_id="20131218" ref_url="test_attestation" /> </metadata> <criteria> - <criterion comment="Check all files and make sure they are owned by a user" - negate="true" - test_ref="test_20050" /> + <criterion comment="Check all files and make sure they are owned by a user" test_ref="no_files_unowned_by_user_test" /> </criteria> </definition> - <unix:file_test xmlns:unix="http://oval.mitre.org/XMLSchema/oval-definitions-5#unix" - check="all" comment="files with no user owner" - id="test_20050" version="1"> - <notes> - <note>This will enumerate all files on local - partitions</note> - </notes> - <unix:object object_ref="obj_20022" /> - <unix:state state_ref="state_20050" /> - </unix:file_test> - <unix:file_state comment="Executables with suid set" - id="state_20050" version="1"> - <unix:user_id datatype="int">0</unix:user_id> + + <unix:file_state id="file_permissions_unowned_userid_list_match" version="1"> + <unix:user_id var_check="at least one" var_ref="file_permissions_unowned_userid_list" datatype="int" /> </unix:file_state> - <unix:file_object comment="all local files" - id="obj_20022" version="1"> - <unix:behaviors recurse="symlinks and directories" recurse_file_system="local" /> + + <local_variable id="file_permissions_unowned_userid_list" comment="List of valid user ids" datatype="int" version="1"> + <object_component item_field="subexpression" object_ref="file_permissions_unowned_userid_list_object" /> + </local_variable> + + <ind:textfilecontent54_object id="file_permissions_unowned_userid_list_object" version="1"> + <ind:filepath>/etc/passwd</ind:filepath> + <ind:pattern operation="pattern match">^[^:]+:[^:]+:([\d]+):[\d]+:[^:]*:[^:]+:[^:]*$</ind:pattern> + <ind:instance operation="greater than or equal" datatype="int">1</ind:instance> + </ind:textfilecontent54_object> + + <unix:file_object comment="all local files" id="file_permissions_unowned_object" version="1"> + <unix:behaviors recurse="symlinks and directories" recurse_direction="down" recurse_file_system="local" /> <unix:path>/</unix:path> <unix:filename operation="pattern match">.*</unix:filename> + <filter action="exclude">file_permissions_unowned_userid_list_match</filter> </unix:file_object> + + <unix:file_test xmlns:unix="http://oval.mitre.org/XMLSchema/oval-definitions-5#unix" + check="all" check_existence="none_exist" comment="Check user ids on all files on the system" + id="no_files_unowned_by_user_test" version="1"> + <unix:object object_ref="file_permissions_unowned_object" /> + </unix:file_test> </def-group> + -- 1.7.1
Works on my machine. Ack.
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