Security Advisories and Notifications

Security Advisory: (BEA07-146.00)

From: Oracle Corporation

Minor Subject: Denial-of-service vulnerability in the proxy plug-in for Apache web server.

Product(s) Affected: WebLogic Server and WebLogic Express

Threat level: High
Denial-of-service attack against the Apache web server hosting the WebLogic Server proxy plug-in.

Severity: High
Users may not be able to reach applications hosted by WebLogic Servers.

A problem was identified that could potentially cause a security vulnerability in certain versions of WebLogic Server. An updated plug-in is available to correct this problem (see Section II). Oracle treats potential security problems with a high degree of urgency and endeavors to take appropriate steps to help ensure the security of our customers' systems. As a result, Oracle strongly suggests the following actions:
I. Read the following advisory.
II. Apply the suggested action.
III. If you know of any additional users interested in future security advisories, please forward them the registration instructions included in this advisory.

I. Advisory

Under certain circumstances, the WebLogic Server proxy plug-in for Apache server may not properly handle a protocol error. As a result, the proxy plug-in could cause the Apache server to fail or to mark backend WebLogic servers as unavailable. Open sessions may fail and applications hosted by backend WebLogic servers may be unreachable. All applications using the WebLogic Server proxy plug-in on an Apache web server are vulnerable.

The following versions of WebLogic Server Apache plug-in are affected by this vulnerability

Apache plug-ins dated prior to June 2006.


Oracle strongly recommends the following course of actions.

WebLogic Server Apache plug-in for Solaris, Linux, and Windows (32-bit)

  1. Download and apply the Apache plugin patch #7824589 from OracleMetaLink as per the instructions below:
    • Select the Patches and Updates tab after logging in to OracleMetaLink.
    • Click Simple Search.
    • In the Search By field, select Patch Number from the list.
    • Enter the patch number. The patch number may be different for different product releases and platforms.
    • Select the platform (or choose generic as applicable)
    • Click Go.
    • Click Download to download the patch.
  2. Save a copy of your old plug-in and install the appropriate plug-in on your Apache Webserver
  3. Restart Apache

Note 1: The WebLogic plug-in for Apache is compatible with all versions of WebLogic Server.

Note 2: If a plug-in for your operating system is not included in the above link, please contact BEA support to request an appropriate plug-in.

Note 3: The plug-in included with releases subsequent to WebLogic Server 9.2 includes the functionality in this update.


Oracle strongly suggests that customers apply the remedies recommended in all our security advisories. Oracle also urges customers to apply every Service/Maintenance Pack as they are released. Service/Maintenance Packs include a roll-up of all bug fixes for each version of the product, as well as each of the prior Service/Maintenance Packs. Service/Maintenance Packs and information about them can be found at:

Note: Information about securing WebLogic Server and WebLogic Express can be found at Specific lockdown information is provided at We strongly encourage you to review this documentation to ensure your server deployment is securely configured.

As a policy, if there are any security-related issues with any Oracle product, Oracle will distribute an advisory and instructions with the appropriate course of action. Because the security of your site, data, and code is our highest priority, we are committed to communicating all security-related issues clearly and openly.

All previous advisories can be viewed at:

Additional users who wish to register for product advisory distribution should follow the registration directions at:

Security issues can be reported to Oracle by following the directions at:

Thank you,
Oracle Corporation