Hi Rodolfo,
What about this?
<ind:textfilecontent54_object id="object_at_system_accounts_allow_list"
version="1">
<ind:filepath>/etc/passwd</ind:filepath>
<ind:pattern operation="pattern
match">^([^:]+):[^:]+:([5-9][\d][\d]|[1-9][\d]{3,}):[\d]+:[^:]*:[^:]+:[^:]*$</ind:pattern>
<ind:instance operation="greater than or equal"
datatype="int">1</ind:instance>
</ind:textfilecontent54_object>
Is that what you are after? It should get the usernames that are greater
than or equal to 500.
Gabe
On Wed, Jun 8, 2016 at 10:32 AM, Rodolfo Martínez <[email protected]> wrote:
> Hi Gabe,
>
> Yes, I am more familiar with OVAL syntax now and I understand why it is
> not working.
>
> The problem in my OVAL test is in this part:
>
> <ind:textfilecontent54_object id="object_at_system_accounts_allow_list"
> version="1">
> <ind:filepath>/etc/passwd</ind:filepath>
> <ind:pattern operation="pattern
> match">^([^:]+):[^:]+:[\d]+:[\d]+:[^:]*:[^:]+:[^:]*$</ind:pattern>
> <ind:instance operation="greater than or equal"
> datatype="int">1</ind:instance>
> <filter action="include">state_at_system_accounts_etc_passwd</filter>
> </ind:textfilecontent54_object>
>
> <ind:textfilecontent54_state id="state_at_system_accounts_etc_passwd"
> 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:subexpression operation="greater than or equal"
> datatype="int">500</ind:subexpression>
> </ind:textfilecontent54_state>
>
>
> '<ind:subexpression>' in block in'<ind:textfilecontent54_state>' is
> getting the subexpression pattern from '<ind:textfilecontent54_object>'
> which contains the username; so comparing a username to be an integer
> 'greater or equal to 500' is not valid.
>
>
> My question is much simpler now:
>
> How can get all usernames from /etc/passwd that have UID greater or equal
> to 500 without using password_object? I have been trying to do this for
> many days now without any luck.
>
> Thanks for your time
>
> --
> Rodolfo Martínez
>
> On Tue, Jun 7, 2016 at 1:03 PM, Gabe Alford <[email protected]> wrote:
>
>> Hello Rodolfo,
>>
>> I just did a quick glance as I currently don't have the cycles to look
>> into this but the "state_at_system_accounts_at_allow_uid" exclude filter is
>> where this is not working. It is not filtering UIDs greater than 1 or 500
>> for that matter.
>> Specifically this subexpression is what is failing:
>>
>> <ind:subexpression operation="greater than or equal"
>> datatype="int">500</ind:subexpression>
>>
>> Gabe
>>
>> On Thu, Jun 2, 2016 at 8:52 PM, Rodolfo Martínez <[email protected]>
>> wrote:
>>
>>> Hi mpreisler,
>>>
>>> Thanks for you suggestion in IRC.
>>>
>>> This what I have so far, but it is still not working. I feel I am close,
>>> but it is not working yet. I would appreciate any suggestion
>>>
>>> <def-group>
>>> <definition class="compliance" id="at_system_accounts" version="1">
>>> <metadata>
>>> <title>No system accounts in /etc/at.allow</title>
>>> <affected family="unix">
>>> <platform>CentOS 5</platform>
>>> <platform>Red Hat Enterprise Linux 5</platform>
>>> </affected>
>>> <description>Group owner for /etc/at.allow and /etc/at.deny must
>>> exist.</description>
>>> </metadata>
>>> <criteria>
>>> <criterion test_ref="test_at_system_accounts_at_allow" />
>>> </criteria>
>>> </definition>
>>>
>>> <!-- This variable should get all users from /etc/passwd that has UID
>>> >= 500 -->
>>> <local_variable id="var_at_system_accounts_allow_list"
>>> comment="Accounts Allowed" datatype="string" version="1">
>>> <object_component item_field="subexpression"
>>> object_ref="object_at_system_accounts_allow_list" />
>>> </local_variable>
>>>
>>> <ind:textfilecontent54_object
>>> id="object_at_system_accounts_allow_list" 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>
>>> <filter action="include">state_at_system_accounts_etc_passwd</filter>
>>> </ind:textfilecontent54_object>
>>>
>>> <ind:textfilecontent54_state id="state_at_system_accounts_etc_passwd"
>>> version="1">
>>> <ind:filepath>/etc/passwd</ind:filepath>
>>> <ind:pattern operation="pattern
>>> match">^[^:]+:[^:]+:([\d]+):[\d]+:[^:]*:[^:]+:[^:]*$</ind:pattern>
>>> <ind:instance operation="greater than or equal"
>>> datatype="int">1</ind:instance>
>>> <ind:subexpression operation="greater than or equal"
>>> datatype="int">500</ind:subexpression>
>>>
>> </ind:textfilecontent54_state>
>>>
>>>
>>> <!-- Test to check that there is no system accounts in /etc/at.allow
>>> -->
>>> <ind:textfilecontent54_test check="all" check_existence="none_exist"
>>> id="test_at_system_accounts_at_allow" comment="Testing /etc/at.allow for
>>> system accounts" version="1">
>>> <ind:object object_ref="object_at_system_accounts_allow" />
>>> </ind:textfilecontent54_test>
>>>
>>> <ind:textfilecontent54_object comment="/etc/at.allow"
>>> id="object_at_system_accounts_allow" version="1">
>>> <!-- Get all users from /etc/at.allow -->
>>> <ind:filepath>/etc/at.allow</ind:filepath>
>>> <ind:pattern operation="pattern match">^(.+)$</ind:pattern>
>>> <ind:instance operation="greater than or equal"
>>> datatype="int">1</ind:instance>
>>> <!-- Exclude root -->
>>> <filter
>>> action="exclude">state_at_system_accounts_at_allow_root</filter>
>>> <!-- Exclude all user accounts -->
>>> <filter
>>> action="exclude">state_at_system_accounts_at_allow_uid</filter>
>>> </ind:textfilecontent54_object>
>>>
>>> <ind:textfilecontent54_state
>>> id="state_at_system_accounts_at_allow_root" version="1">
>>> <ind:text>root</ind:text>
>>> </ind:textfilecontent54_state>
>>>
>>> <unix:password_state id="state_at_system_accounts_at_allow_uid"
>>> version="1">
>>> <unix:username var_ref="var_at_system_accounts_allow_list"
>>> var_check="at least one" />
>>> </unix:password_state>
>>>
>>> </def-group>
>>>
>>> --
>>> Rodolfo
>>>
>>> --
>>> Rodolfo Martínez
>>>
>>> On Tue, May 31, 2016 at 5:43 PM, Rodolfo Martínez <[email protected]>
>>> wrote:
>>>
>>>> Hi List,
>>>>
>>>> After many hours playing with SSG and OpenSCAP and not able to do what
>>>> I want I need some help.
>>>>
>>>> Forgive me if I use SCAP or OpenSCAP terms incorrectly, I am new to
>>>> SSG and I am still getting familiar.
>>>>
>>>> The following OVAL test searches for system accounts (UID < 500) in
>>>> /etc/at.allow (I am showing just the relevant parts of
>>>> RHEL/5/input/oval/at_system_accounts.xml to explain my problem):
>>>>
>>>> <criteria>
>>>> <criterion test_ref="test_at_system_accounts_at_allow" />
>>>> </criteria>
>>>>
>>>> <unix:password_test check="all" check_existence="none_exist"
>>>> comment="Testing system accounts in /etc/at.allow"
>>>> id="test_at_system_accounts_at_allow" version="1">
>>>> <unix:object object_ref="object_at_system_accounts_at_allow" />
>>>> </unix:password_test>
>>>>
>>>> <unix:password_object id="object_at_system_accounts_at_allow"
>>>> version="1">
>>>> <unix:username operation="equals"
>>>> var_ref="var_at_system_accounts_allow_list" var_check="at least one"
>>>> datatype="string" />
>>>> <filter
>>>> action="include">state_at_system_accounts_at_allow_uid</filter>
>>>> </unix:password_object>
>>>>
>>>> <local_variable id="var_at_system_accounts_allow_list"
>>>> comment="Accounts Allowed" datatype="string" version="1">
>>>> <object_component item_field="subexpression"
>>>> object_ref="object_at_system_accounts_allow_list" />
>>>> </local_variable>
>>>>
>>>> <ind:textfilecontent54_object comment="/etc/at.allow"
>>>> id="object_at_system_accounts_allow_list" version="1">
>>>> <ind:filepath>/etc/at.allow</ind:filepath>
>>>> <ind:pattern operation="pattern match">^(.*)$</ind:pattern>
>>>> <ind:instance operation="greater than or equal"
>>>> datatype="int">0</ind:instance>
>>>> </ind:textfilecontent54_object>
>>>>
>>>> <unix:password_state id="state_at_system_accounts_at_allow_uid"
>>>> version="1">
>>>> <unix:user_id datatype="int" operation="less than">500</unix:user_id>
>>>> </unix:password_state>
>>>>
>>>>
>>>> The test above gets the users information from the sources specified
>>>> in NSS (/etc/nsswitch.conf) which is correct, however I want to create
>>>> a version that uses /etc/passwd directly. Why? We have many
>>>> (thousands?) of RHEL 5 based servers with LDAP integration, and many
>>>> (thousands?) of accounts in the LDAP servers.
>>>>
>>>> Simple tests like RHEL/5/input/oval/at_system_accounts.xml and
>>>> RHEL/5/input/oval/cron_system_accounts.xml can take hours to run
>>>> because they retrieve *all* users information from the LDAP servers
>>>> and they do it *for each entry* in /etc/at.allow and /etc/cron.allow.
>>>> Also, if we run OpenSCAP (oscap) at the same time in a few servers
>>>> they hit the LDAP servers really bad.
>>>>
>>>> I have been trying to replace password_test and password_object by
>>>> textfilecontent54_test and textfilecontent54_object without any luck.
>>>> If you want, I can share my at_system_accounts.xml file that I thought
>>>> it was going to work.
>>>>
>>>> I would really appreciate any help or hint?
>>>>
>>>>
>>>> Regards
>>>> --
>>>> Rodolfo Martínez
>>>>
>>>
>>>
>>> --
>>> SCAP Security Guide mailing list
>>> [email protected]
>>>
>>> https://lists.fedorahosted.org/admin/lists/[email protected]
>>> https://github.com/OpenSCAP/scap-security-guide/
>>>
>>>
>>
>> --
>> SCAP Security Guide mailing list
>> [email protected]
>>
>> https://lists.fedorahosted.org/admin/lists/[email protected]
>> https://github.com/OpenSCAP/scap-security-guide/
>>
>>
>
> --
> SCAP Security Guide mailing list
> [email protected]
>
> https://lists.fedorahosted.org/admin/lists/[email protected]
> https://github.com/OpenSCAP/scap-security-guide/
>
>
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