Security Advisories and Notifications

Security Advisory: (BEA07-152.00)

From: Oracle Corporation

Minor Subject: Multiple vulnerabilities in WebLogic Server proxy plug-in for Netscape Enterprise Server

Product(s) Affected: WebLogic Server and WebLogic Express

Threat level: High
A remote attacker may exploit these error conditions to prevent access to applications or render the hosting Web server unavailable or into a state of high resource consumption.

Severity: High
As a result of the attack, users may lose their current session and be forced to login again or access to the application may be degraded or unavailable.

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, a request via the WebLogic Server proxy plug-in for Netscape Enterprise Server may create an error condition such that:

  • the proxy plug-in may misrepresent the availability of a WebLogic Server and mark this server as unavailable,
  • an overflow condition may be created resulting in the failure of the hosting web server,
  • the hosting web server may be rendered into a state of high CPU utilization

As a result, user sessions may be lost and users may be forced re-authenticate, users may not be able to reach applications hosted on WebLogic Servers, or access to the application may be degraded. An attacker can exploit these conditions to create denial of service attacks against web applications accessed via the proxy.

The following versions of WebLogic Server Netscape Enterprise Server proxy plug-in are affected by this vulnerability

Plug-ins dated prior to September, 2006.


Oracle strongly recommends the following course of actions.

WebLogic Server plug-in for Netscape Enterprise Server on Solaris, Linux, and Windows (32-bit):

  1. Download and apply the NES plug-in patch #7824597 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 Netscape Enterprise Webserver
  3. Restart your WebServer

Note 1: The WebLogic plug-in 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