TeamSHATTER Security Advisory: Oracle Malformed Network Package Spins CPU

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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.
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