-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 AppSecInc Team SHATTER Security Advisory
Some failed authentication attempts using OCIPasswordChange API are not recorded. Risk Level: Medium Affected versions: Oracle Database Server version 10gR1, 10gR2 (10.2.0.4 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. When this API is used to authenticate a user and at the same time change the password, failed logins attempts are recorded only sporadically. The failed login attempt will be recorded only when the decryption of the new password (AUTH_NEW_PASSWORD field) performed by the server, is successful. This allows an attacker to perform much more failed logins attempts than what are actually allowed by password policy. The approximate rate of failed login attempts that are recorded is only one every 200 or more attempts. Impact: Remote unauthenticated attackers can perform a much higher numbers of login attempts without being locked out by the password policy. In addition, the failed login attempt is not recorded in database auditing trails. Vendor Status: Vendor was contacted and a patch was released. Workaround: Implement a strong password policy. Use network or directory service based authentication as opposed to native database authentication. Fix: Apply Oracle Critical Patch Update April 2012 available at Oracle Support. CVE: CVE-2012-0511 Links: http://www.oracle.com/technetwork/topics/security/cpuapr2012-366314.html https://www.teamshatter.com/?p=3440 Timeline: Vendor Notification - 12/08/2011 Vendor Response - 12/15/2011 Fix - 4/17/2012 Public Disclosure - 4/19/2012 - -- _____________________________________________ 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. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (MingW32) - WinPT 1.4.3 Charset: UTF-8 iEYEARECAAYFAk+Qe2YACgkQRx91imnNIgGbKQCaAmGaN+X+t8TgB9KaE53DEApF d5UAoJhleLxqf78/sgJZvtG7gsYu8e3a =+2TC -----END PGP SIGNATURE----- _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/