Security Advisories and Notifications

Subject: Security Advisory (BEA08-199.00)
From: Oracle Corporation
Minor Subject: A carefully constructed URL may cause the Sun, IIS or Apache web-server to crash
Product(s) Affected: WebLogic Server and WebLogic Express

Threat level: High
A remote attacker may cause BEA’s web server plugin to crash the Sun, IIS or Apache web server.

Severity: High
This denial of service attack may result in a service outage.

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

An attacker can use a carefully constructed URL to cause BEA's proxy plugin to crash the Sun, IIS or Apache web server process. On re-start, this may cause in-flight requests to be lost. This can cause a temporary denial of service. This attack can be exploited remotely, and the attacker does not need any authentication.

This advisory resolves the issue in the plugin by correctly handling URLs.

Impact and CVSS Ratings:

CVSS Severity Score: 5.0 (Medium)
Attack Range (AV): Network
Attack Complexity (AC): Low
Authentication Level (Au): None
Impact Type: Partial availability impact
Vulnerability Type: Denial of service
CVSS Base Score Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:P)

Complete CVSS Guide:
Online Calculator:

The following versions of WebLogic Server and WebLogic Express are affected by this vulnerability

  • Plug-ins dated prior to November 2007


Oracle strongly recommends the following course of actions.

WebLogic Server plug-in for supported Sun, IIS and Apache web servers:

  1. Download and apply the latest web server plug-in patch #7825142 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 Web Server.
  3. Restart your Web Server
  4. Note: The WebLogic plug-in is compatible with all versions of WebLogic Server.

    WebLogic Server 9.2 Maintenance Pack 3, WebLogic Server 10.0 Maintenance Pack 2 and WebLogic Server 10.3 will include this fix.


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