TeamSHATTER Security Advisory: Oracle Malformed Network Package Spins CPU

[Shatter <shatter@xxxxxxxxxxxxx>]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

TeamSHATTER Security Advisory

April 21, 2011

Risk Level:
High

Affected versions:
Oracle Database Server version 10gR1, 10gR2, 11gR1 and 11gR2 (on Windows 
platform)


Remote exploitable:
Yes

Credits:
This vulnerability was discovered and researched by Esteban Martinez Fayo of 
Application Security Inc.

Details:
Sending a specially crafted network packet to an Oracle Database during the 
connection before the user authentication is performed it is possible to make 
the Oracle process consume all available CPU resources.  To exploit this 
vulnerability no authentication is needed, the attacker needs to know the SID 
or Service Name of the database.

Impact:
It is possible to cause a denial of service on the Oracle process by sending a 
specially crafted network packet.

Vendor Status:
Vendor was contacted and a patch was released.

Workaround:
There is no workaround for this vulnerability.

Fix:
Apply Oracle Critical Patch Update April 2011 available at Oracle Support.

CVE:
CVE-2011-0806

Links:
http://www.oracle.com/technetwork/topics/security/cpuapr2011-301950.html

Timeline:
Vendor Notification - 7/19/2010
Vendor Response - 7/23/2010
Fix - 4/19/2011
Public Disclosure - 4/19/2011

Application Security, Inc's database security solutions have helped over 2000 
organizations secure their databases from all internal and external threats 
while also ensuring that those organizations meet or exceed regulatory 
compliance and audit requirements.

Disclaimer: The information in the advisory is believed to be accurate at the 
time of publishing based on currently available information. Use of the 
information constitutes acceptance for use in an AS IS condition. There are no 
warranties with regard to this information. Neither the author nor the 
publisher accepts any liability for any direct, indirect, or consequential loss 
or damage arising from use of, or reliance on, this information.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.11 (MingW32)

iEYEARECAAYFAk299ecACgkQRx91imnNIgEYBACfXam30elGBzOd6O7bQexoRV4/
feIAnAtw7qyR8+HClgAg1d2qbhuNV4mp
=f4qp
-----END PGP SIGNATURE-----