Locating user tables in an Oracle 11g database

Excuse my ignorance on this subject
But our company has an Oracle 11g database that drives one of our business applications. I am not an oracle admin and there is very little documentation on the application itself, however the application seems to have its own set of explicit login (username and password) credentials so I am guessing they are hashed somewhere in the database tables.
My question would be – are there any default oracle tables where user credentials would typically be? or tips on tracking down where the password hashes may be? Or can this differ from application to application? Any tips welcome. Apologies for the naivity of the question. My goal is to identify which database accounts can query the table the hashes are in, as we have some users who can access the database for data analysis purposes - but I dont want them to have access to the table.

user599292 wrote:
EdStevens wrote:
user599292 wrote:
Excuse my ignorance on this subject
But our company has an Oracle 11g database that drives one of our business applications. I am not an oracle admin and there is very little documentation on the application itself, however the application seems to have its own set of explicit login (username and password) credentials so I am guessing they are hashed somewhere in the database tables.
My question would be – are there any default oracle tables where user credentials would typically be? or tips on tracking down where the password hashes may be? Or can this differ from application to application? Any tips welcome. Apologies for the naivity of the question. My goal is to identify which database accounts can query the table the hashes are in, as we have some users who can access the database for data analysis purposes - but I dont want them to have access to the table.The information relative to the user accounts is revealed in the view DBA_USERS, which normal users should not have a need to see. However, the passwords are stored in a true hash. It cannot be used directly, and cannot be reversed. So being able to see the hashed password does not in itself constitute a security risk.
When a user is being authenticated, the procedure that oracle uses is NOT to 'decrypt' the stored password to see if it matches the password presented by the user. Rather, the password presented by the user is hashed, and that hash value is compared against the stored value.My concern was if they could extract those password hash values, there are many free password crackers where if they run dictionary values against those hash values and if any match they then have some passwords to gain perhaps elevated access in the application.Such a method would have to assume a password, know how oracle 'salts' the password, hash the result, then compare to the hashed values from the table. If you employ even a modicum of password complexity enforcement, I doubt that your developers are going to have access to the kind of computing capacity that would be required to get a positive result within your lifetime.
You need to do three things
First and foremost, adhere to the principle of 'least privilege'. Do not grant a user account any privileges that are not required for that account to complete it's business task. That includes access to any tables or views. Be wary of any "--ANY---" privileges.
Second, use the password complexity function to enforce a reasonable level of password complexity.
Third, Set the user's profile to expire the pasword after 'x' number of days and prevent the reuse of a password until after 'y' iterations.

Similar Messages

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Must be
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What are the privileges required for explain plan in Oracle 11g database

I am facing the problem in doing a explain plan for a view in Oracle 11g database. When I select from the view like this:
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Regards

975148 wrote:
Thanks for your reply. I have found out that an explain plan is possible on the user's own objects and is not possible on the granted objects from a different schema. For eg, if I do a explain plan on a view querying on tables from a different view, it would not allow the explain plan to proceed. This could mean that explain plan needs different privileges than just a select.
Requesting for a revert to this.
Here is a simple test case that I have perfomed
SQL> create user test1 identified by test1;
User created.
SQL> create user test2 identified by test1;
User created.
SQL> grant connect, resource to test1,test2;
Grant succeeded.
SQL> create table test1.tab1 as select * from v$session;
Table created.
SQL> connect test2/test1
Conencted.
SQL> show user
USER is "TEST2"
SQL>
SQL> explain plan for
2 select sid,serial#,status,username from test1.tab1 where username<> '';
Explained.
SQL>
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As far as privileges are concerned, following is the list
SQL> select * from dba_role_privs where grantee in ('TEST1','TEST2') order by 1;
GRANTEE                        GRANTED_ROLE                   ADM DEF
TEST1                          CONNECT                        NO YES
TEST1                          RESOURCE                       NO YES
TEST2                          CONNECT                        NO YES
TEST2                          RESOURCE                       NO YES
SQL>
SQL> select grantee,owner,table_name,privilege from dba_tab_privs where grantee in ('TEST1','TEST2') order by 1;
GRANTEE    OWNER      TABLE_NAME           PRIVILEGE
TEST2      TEST1      TAB1                 SELECT
SQL>
SQL> select * from dba_sys_privs where grantee in ('TEST1','TEST2') order by 1;
GRANTEE    PRIVILEGE                      ADM
TEST1      UNLIMITED TABLESPACE           NO
TEST2      UNLIMITED TABLESPACE           NO
SQL>

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I am having some difficulty parsing an XML file into oracle 11g database.
Currently using Oracle 11g Express Edition (XE)
Here is how my XML file looks like:
<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
- <AccountMap xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
- <Accounts>
- <AccountMapping>
<AccountID>0000000000000-000</AccountID>
<AccountName>XLS</AccountName>
<AccountType>Excel</AccountType>
<AccountOwner>System</AccountOwner>
</AccountMapping>
- <AccountMapping>
<AccountID>0000000000000-001</AccountID>
<AccountName>XLSS</AccountName>
<AccountType>Excel2</AccountType>
<AccountOwner>System2</AccountOwner>
</AccountMapping>
- <AccountMapping>
and so on the file continues.. I have the xml file saved on my local hard disk
I have created a package in SQL Developer
create or replace
PACKAGE XML_FILEHANDLER AS
type TRecord is record (
Account_ID varchar2(100)
, AccountName varchar2(100)
, AccountType varchar2(30)
, AccountOwner varchar2(100)
type TRecordTable is table of TRecord;
function getRows (p_directory in varchar2, p_filename in varchar2) return TRecordTable pipelined;
END XML_FILEHANDLER;
-- BODY
create or replace
PACKAGE BODY XML_FILEHANDLER AS
function getRows (p_directory in varchar2, p_filename in varchar2) return TRecordTable pipelined AS
nb_rec NUMBER := 1;
tmp_xml CLOB;
tmp_file CLOB;
rec TRecord;
BEGIN
dbms_lob.createtemporary(tmp_file, true);
tmp_file := dbms_xslprocessor.read2clob(p_directory, p_filename);
rec.Account_ID := regexp_replace(tmp_file, '.*<Account_ID>(.*)</Account_ID>.*', '\1', 1, 1, 'n');
rec.AccountName := regexp_replace(tmp_file, '.*<AccountName>(.*)</AccountName>.*', '\1', 1, 1, 'n');
rec.AccountType := regexp_replace(tmp_file, '.*<AccountType >(.*)</AccountType >.*', '\1', 1, 1, 'n');
rec.AccountOwner := regexp_replace(tmp_file, '.*<AccountOwner>(.*)</AccountOwner>.*', '\1', 1, 1, 'n');
loop
-- this regexp finds occurrence(s) of this pattern : "<?xml ... ?><root_tag> ... </root_tag>"
tmp_xml := regexp_substr(tmp_file, '<\?xml[^?]+\?>\s+<([^>]+)>.*?</\1>', 1, nb_rec, 'n');
exit when length(tmp_xml) = 0;
--dbms_output.put_line(tmp_rec);
nb_rec := nb_rec + 1;
SELECT Account_ID, AccountName, AccountType, AccountOwner
into rec.Account_ID, rec.AccountName, rec.AccountType, rec.AccountOwner
from xmltable(
'Accounts/AccountMapping' passing xmltype(tmp_xml) columns
Account_ID varchar2(100) path 'Account_ID'
, AccountName varchar2(100) path 'AccountName'
, AccountType varchar2(30) path 'AccountType'
, AccountOwner varchar2(100) path 'AccountOwner'
pipe row ( rec );
end loop;
dbms_lob.freetemporary(tmp_file);
END getRows;
END XML_FILEHANDLER;
-- I am calling my function using the following sql query
select * from table(XML_FileHandler.getRows('XML', 'test.xml'));
Here is the error I am receiving
ORA-29283: invalid file operation
ORA-06512: at "SYS.UTL_FILE", line 536
ORA-29283: invalid file operation
ORA-06512: at "XDB.DBMS_XSLPROCESSOR", line 265
ORA-06512: at "user.XML_FILEHANDLER", line 13
29283. 00000 - "invalid file operation"
*Cause:    An attempt was made to read from a file or directory that does
not exist, or file or directory access was denied by the
operating system.
*Action:   Verify file and directory access privileges on the file system,
and if reading, verify that the file exists.
I have done the following
- Provided appropriate access to user (read, write) including directory access rights
- ensured that directory exists
- ensured that file exists
I have searched all over google and metalink but am unable to get this to run.. please help!

>
SELECT Account_ID, AccountName, AccountType, AccountOwner
into rec.Account_ID, rec.AccountName, rec.AccountType, rec.AccountOwner
from xmltable(
'Accounts/AccountMapping' passing xmltype(tmp_xml) columns
Account_ID varchar2(100) path 'Account_ID'
, AccountName varchar2(100) path 'AccountName'
, AccountType varchar2(30) path 'AccountType'
, AccountOwner varchar2(100) path 'AccountOwner'
>
change to
SELECT Account_ID, AccountName, AccountType, AccountOwner
into rec.Account_ID, rec.AccountName, rec.AccountType, rec.AccountOwner
from xmltable(
'AccountMap/Accounts/AccountMapping' passing xmltype(tmp_xml) columns
Account_ID varchar2(100) path 'Account_ID'
, AccountName varchar2(100) path 'AccountName'
, AccountType varchar2(30) path 'AccountType'
, AccountOwner varchar2(100) path 'AccountOwner'
SQL> SELECT Account_ID, AccountName, AccountType, AccountOwner
2 --into rec.Account_ID, rec.AccountName, rec.AccountType, rec.AccountOwner
3 from xmltable(
4 'AccountMap/Accounts/AccountMapping' passing
5 xmltype('<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
6 <AccountMap xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
7 <Accounts>
8 <AccountMapping>
9 <AccountID>0000000000000-000</AccountID>
10 <AccountName>XLS</AccountName>
11 <AccountType>Excel</AccountType>
12 <AccountOwner>System</AccountOwner>
13 </AccountMapping>
14 <AccountMapping>
15 <AccountID>0000000000000-001</AccountID>
16 <AccountName>XLSS</AccountName>
17 <AccountType>Excel2</AccountType>
18 <AccountOwner>System2</AccountOwner>
19 </AccountMapping>
20 </Accounts>
21 </AccountMap>')
22 columns
23 Account_ID varchar2(100) path 'Account_ID'
24 , AccountName varchar2(100) path 'AccountName'
25 , AccountType varchar2(30) path 'AccountType'
26 , AccountOwner varchar2(100) path 'AccountOwner'
27 );
ACCOUNT_ID                                                                       ACCOUNTNAME                                                                      ACCOUNTTYPE                    ACCOUNTOWNER
                                                                                 XLS                                                                              Excel                          System
                                                                                 XLSS                                                                             Excel2                         System2
SQL> for AccountID use AccountID not Account_ID
Account_ID varchar2(100) path 'AccountID'Edited by: AlexAnd on Aug 9, 2012 12:35 AM

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Just to set the scene:
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regards
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Export: Release 9.2.0.8.0 - Production on Wed Oct 29 13:22:43 2008
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
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tion
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Export grants (yes/no): yes >
Export table data (yes/no): yes >
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server uses WE8MSWIN1252 character set (possible charset conversion)
{color:#000000}here appears famous microdoft window saying EXP.EXE has encountered a problem and needs to close blah blah blah
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{color}
{color:#000000}nadeem{color}
{color}

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How to monitor the Oracle 11g database sessions on Windows 2008 server (other than SQL Developer tool), which procedure or query is taking more time with Java application.

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http://myorasql.com/
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Adipur wrote:
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Re: Trouble installing Oracle Personal in Windows 7 64-bit environment
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user10956040 wrote:
Hi All,
Why are you hijacking someone else's thread? This just makes it harder to deal with the OP's issue, even if you think it is closely related to yours, and you haven't given any indication that it is at all related.
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I have two cars in my garage. One works. One doesn't. Why so?
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Hi,
I have installed Oracle 11g database.
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
PL/SQL Release 11.2.0.3.0 - Production
CORE 11.2.0.3.0 Production
TNS for 64-bit Windows: Version 11.2.0.3.0 - Production
NLSRTL Version 11.2.0.3.0 - Production
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Is any impact on the database?
Kindly suggest,
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Sachin

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Nicolas.

What should i do with an Oracle 11g Database, MySQL database and a dump file.

I just joining to a new work field, almost about a database and i know "NOTHING" about this field.
My company has a system that running by Oracle Database, the problem is that Oracle Database will cost a lot of money when my company expands.
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I just joining to a new work field, almost about a database and i know "NOTHING" about this field.
My company has a system that running by Oracle Database, the problem is that Oracle Database will cost a lot of money when my company expands.
So the quest is converting Oracle Database to MySQL database.
I predict that converting to MySQL will cost your company more as it expands. As you expand managing contention becomes more important - Oracle does this for you. I do not think MySQL does, so you'll have to write more code to deal with this, costing the company money. A big part of making application scalable and reliable is to use stored procedures, how good are MySQL's compared to PL/SQL's. What other features are there that MySQL has that will benefit your company that Oracle doesn't. What do you need to think about as your company expands that need to be taken care of in the database. I would have thought a migration from MySQL to Oracle would be more common to deal with expansion.
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Hi All,
I need to implement automatic table partitioning in Oracle 11g version, but partitioning interval should be on daily basis(For every day).
I was able to perform this for Monthly and Yearly but not on daily basis.
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create table part
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SQL>
1 create table part
2 (a date)PARTITION BY RANGE (a)
3 INTERVAL (NUMTOYMINTERVAL(1,'*DAY*'))
4 (partition p1 values less than (TO_DATE('01-NOV-2007','DD-MON-YYYY'))
5* )
SQL> /
INTERVAL (NUMTOYMINTERVAL(1,'DAY'))
ERROR at line 3:
ORA-14752: Interval expression is not a constant of the correct type
SQL> create table part
(a date)PARTITION BY RANGE (a)
INTERVAL (NUMTOYMINTERVAL(1,'*DD*'))
(partition p1 values less than (TO_DATE('01-NOV-2007','DD-MON-YYYY'))
); 2 3 4 5
INTERVAL (NUMTOYMINTERVAL(1,'DD'))
ERROR at line 3:
ORA-14752: Interval expression is not a constant of the correct typePlease suggest me to resolve this ORA-14752 error for using DAY or DD or HH24
-Yasser

Yes, for differenct partitions for different months.
interval (numtoyminterval(1,'MONTH'))
store in (TS1,TS2,TS3)
This code will store data in partitions in tablespaces TS1, TS2, and TS3 in a round robin manner.
for Day wise day yes you can store
INTERVAL (NUMTODSINTERVAL(1,'day')) or
INTERVAL (NUMTODSINTERVAL(2,'day')) or
INTERVAL (NUMTODSINTERVAL(3,'day')) or
INTERVAL (NUMTODSINTERVAL(4,'day')) or
INTERVAL (NUMTODSINTERVAL(5,'day')) or
INTERVAL (NUMTODSINTERVAL(n,'day'))

Oracle 11g Database Configuration Assistant Hangs At 45% During 1st Install

Platform: Windows Vista 64 Bit Version
Downloaded: Oracle 11g Database 64 Bit
Service Pack 1
Greetings to all my Oracle Seniors. I have been attempting in vain to install the Oracle 11g database software package fully. I was able to complete the initial installation and made it to the second recommended action which was the Database Configuration Assistant operation. After 3 attempts, the progress bar stalled at 45%. I tried to look at the log file cfgtoologs (cloneDBCreation, and CloneRmanRestore), but it said that I didn't have permission. My pre-check cleared OK on everything. So, please direct me as to how to correct this issue.
Thanks
Preston
System Integrator

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Difference btween oracle 10G database & oracle 11G database

Hi
i have a web application have 10G database engine, now i will upload it on a host server witch supports oracle 11G database.
can i export Dump file from my Oracle10g database and import it into oracle 11G database successful.
what can i do?
please suggest me
thank you

Hi,
Difference btween oracle 10G database & oracle 11G database Here is a complete list:
http://www.dba-oracle.com/oracle11g/oracle_11g_new_features.htm
can i export Dump file from my Oracle10g database and import it into oracle 11G database successful.Yes. Oracle supports backward compatibility . . .
You mght not, however do it the other way . . .
Hope this helps . . .
Donald K. Burleson
Oracle Press author
Author of "Oracle Tuning: The Definitive Reference"
http://www.rampant-books.com/t_oracle_tuning_book.htm
"Time flies like an arrow; Fruit flies like a banana".

Locating user tables in an Oracle 11g database

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