Public Vulnerability Reports

Oracle Secure Backup Administration Server login.php Command Injection Vulnerability

01.13.09

BACKGROUND

Oracle Secure Backup is a network backup system for Oracle Databases. For more information, see:

http://www.oracle.com/database/secure-backup.html

DESCRIPTION

Remote exploitation of an input validation vulnerability in the authentication component of Oracle Corp.'s Secure Backup Administration Server could allow an unauthenticated attacker to execute arbitrary commands in the context of the running server.

The vulnerability is in a function of common.php which is called from the login.php page. The script fails to sanitize the input when verifying the user has permission to use the service.

ANALYSIS

Successful exploitation allows an attacker to gain complete control over an affected system. Because the the Administration Server runs as an unprivileged user, commands will be executed as that user. Under the Linux (and possibly other) installations many files are installed world writable. These include the configuration file for the Apache web-server that the Administration Server is built on. This server starts as the root user and changes to a user specified by the configuration files. Since these files are writable by the user it may be possible for them to gain access to the root user account. Other configuration and executable files are also able to be changed.

DETECTION

Oracle Corp.'s Secure Backup version 10.1.0.3 for Linux has been confirmed vulnerable. Other versions and other platforms may also be affected.

WORKAROUND

Block access to the httpd interface of vulnerable servers Remove write access for 'other' users to all files. The following command will recursively change the permissions to remove write permission to 'other'.

chmod -R o-w directory/

This may prevent some aspects of the system from functioning correctly.

VENDOR RESPONSE

Oracle has released a patch which addresses this issue. For more information, consult their advisory at the following URL.

http://www.oracle.com/technology/deploy/security/critical-patch-updates/cpujan2009.html

CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2008-5449 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org/), which standardizes names for security problems.

DISCLOSURE TIMELINE

03/08/2007 Initial Vendor Notification
03/08/2007 Initial Vendor Reply
11/24/2008 Additional Vendor Feedback
01/13/2009 Coordinated Public Disclosure

CREDIT

The discoverer of this vulnerability wishes to remain anonymous.

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