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AppSecInc Team SHATTER Security Advisory

Incomplete protection of Oracle Database locked accounts.

Risk Level:

Low

Affected versions:

Oracle Database Server version 10gR1, 10gR2 (10.2.0.5 and previous

patchsets) and 11gR1 (11.1.0.7 and previous patchsets)

Remote exploitable:

Yes (No authentication is required)

Credits:

This vulnerability was discovered and researched by Esteban Martinez

Fayo of Application Security Inc.

Details:

Oracle Database provides OCIPasswordChange API to change user passwords.

This API can be used while a user is logged on as well as before the

authentication process is completed, this is because it can be used for

accounts that have the password expired so that the user is able to

change an expired password for a new one.

It was observed that this API can be used to change the password of

users that are locked. The purpose of locking an account is to

deactivate it once it has received too many failed logins attempts or

when no login is expected. If it is allowed to change the password of a

locked account it is not correctly protecting it because brute force can

be applied on an account to change its password and eventually it will

get changed to a known password. The attacker will be able to log in

using the account only once it is unlocked.

Impact:

An unauthenticated attacker can perform on-line brute force of accounts

to change the password to a known value. The attacker will be able to

log in using the account only once it is unlocked.

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 2012 available at Oracle Support.

CVE:

CVE-2012-0510

Links:

http://www.oracle.com/technetwork/topics/security/cpuapr2012-366314.html

https://www.teamshatter.com/?p=3443

Timeline:

Vendor Notification - 12/08/2011

Vendor Response - 12/15/2011

Fix - 4/17/2012

Public Disclosure - 4/19/2012

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_____________________________________________

Copyright (c) 2012 Application Security, Inc.

http://www.appsecinc.com

About Application Security, Inc.

AppSecInc is a pioneer and leading provider of database security

solutions for the enterprise.

By providing strategic and scalable software-only solutions -

AppDetectivePro for auditors and IT advisors, and DbProtect for the

enterprise - AppSecInc supports the database security lifecycle for some

of the most complex and demanding environments in the world across more

than 1,300 active commercial and government customers.

Leveraging the world's most comprehensive database security

knowledgebase from the company's renowned team of threat researchers,

TeamSHATTER, AppSecInc products help customers achieve unprecedented

levels of data security from nefarious or accidental activities, while

reducing overall risk and helping to ensure continuous regulatory and

industry compliance.

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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