Imperva has released an advisory for a bug that they have found in the TNS protocol that allows a user with no more than CREATE SESSION privileges to execute any SQL statement in the context of the SYS user. Imperva's advisory is titled "Security Advisory: Oracle DBMS – Critical Access Control Bypass in Login Bug". This is a very interesting advisory that details how the O3Login process can be used to execute any SQL command. During the login process the first request (message code 0x73) contains only the username, the second request (message code 0x76) contains the username and an encrypted password. It also contains name-value pairs intended to set up session attributes. One of these is AUTH_ALTER_SESSION intended to set up language and locale. It can however be used to create a user and create DBA privileges for that account.
This is a very interesting bug described in this alert.
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Pete Finnigan's Oracle Security Weblog
This is the weblog for Pete Finnigan. Pete works in the area of Oracle security and he specialises in auditing Oracle databases for security issues. This weblog is aimed squarely at those interested in the security of their Oracle databases.
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January 2006
- Niall has a good post - DBA as User - 01/05/2006 by 01/05/2006
- up front security - 01/06/2006 by 01/06/2006
- A tiny digital camera - 01/07/2006 by 01/07/2006
- Oracle 'Worm' Exploit Gets Ominous Tweak - 01/08/2006 by 01/08/2006
- Justin talks about a new series of papers on Oracle security by Arup - 01/09/2006 by 01/09/2006
- Howard has some good advice on protecting against worms - 01/10/2006 by 01/10/2006
- Doug has posted an intersting note about executing of SQL script from URL's - 01/12/2006 by 01/12/2006
- Oracle is finally listening to customers about fix times and security patch quality - 01/14/2006 by 01/14/2006
- Interview with Oracle's security chief - 01/16/2006 by 01/16/2006
- Red Database Security has released 5 Oracle security bug advisories - 01/17/2006 by 01/17/2006
- Alex has added advisories for 23 security bugs fixed in 10g Release1 - 01/19/2006 by 01/19/2006
- Alex has produced a detailed analysis of the Jan 2006 CPU - 01/22/2006 by 01/22/2006
- Duncan Harris speaks on Oracle Security - 01/24/2006 by 01/24/2006
- Oracle is advising customers to patch the last CPU very quickly - 01/25/2006 by 01/25/2006
- An argument rages in the ePress between Oracle and Litchfield - 01/27/2006 by 01/27/2006
- Gartner: Oracle no longer a bastion of security - 01/30/2006 by 01/30/2006
- How to connect to the database using Perl - with two way communication - 01/31/2006 by 01/31/2006
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