Urgent! User SYS by given login no matter what password
HelloOur oracle server SYS (as sysdba) user logon by given no matter what password.
Shock us and must be stopped this issue immediately as the same danger.
I modified the "SYS" user with the new password. Eventhough, always his login using any password.
Kindly guide / help me solve this problem as soon as POSSIBLE.
Thank you
Orahar.
What is your version of the OS?
What is your version of Oracle?
In sqlnet.ora SQLNET. AUTHENTICATION_SERVICES = (NTS)
Change to:
SQLNET. AUTHENTICATION_SERVICES = (NONE)
My understanding of SYS Login is like this:
If SQLNET. AUTHENTICATION_SERVICES = (NTS) and current OS user is in the ORA_DBA group in the operating system and THEN
Anyuser will be connected to any password even with 'as sysdba.
connect as sysdba anyuser/anyuser
Connect sys/anypw as sysdba
ENDIF
If SQLNET. AUTHENTICATION_SERVICES = (NONE) THEN
If remote_login_passwordfile = EXCLUSIVE THEN lock
The user SYS will be never connected even with valid password
Only sys-users will be authenticated by the file password that have sysdba priv.
ENDIF
If remote_login_passwordfile = SHARED THEN
Only the SYS user will be connected with the valid password according to the password files.
ENDIF
ENDIF
HTH
Girish Sharma
Tags: Database
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Jihong,
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Copyright (c) 1982, 2010, Oracle. All rights reserved.
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