Security Advisories and Notifications

Security Advisory: (BEA02-20.00)

From: Oracle Corporation

Minor Subject: Upgrades to prevent data sharing

Product(s) Affected: BEA WebLogic Server and Express

Threat level: Low

Severity: Moderate

Recently a customer identified a problem that could potentially cause a security vulnerability in certain versions of BEA WebLogic Server and Express. This problem has been corrected in recent Service Packs.  BEA treats such possibilities with the highest degree of urgency and does everything possible to ensure the security of all customer assets. As a result, we strongly suggest the following action:

      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 below.


A potential security vulnerability was discovered that could allow HTTP response data to be shared among two users.

The following BEA WebLogic Server and Express releases are affected by this vulnerability
  • Version: BEA WebLogic Server and Express 6.1, 6.1 SP1, 6.1 SP2, 7.0 and


The WebLogic Server buffers response data for better performance. A defect exists that allows a data buffer to be shared between two http responses. This is a rare random occurrence that cannot be intentionally exploited. The defect has been remedied in WebLogic Server 7.0 Service Pack 1 and WebLogic Server 6.1, Service Pack 3.


Oracle strongly recommends the following course of actions:

Apply the appropriate Service Pack:
  • Version: BEA WebLogic Server and Express 7.0, released or
    • Upgrade to Service Pack 1

  • Version: BEA WebLogic Server and Express version 6.1 standalone and as part of BEA WebLogic Enterprise 6.1 , released or Service Pack 1.
    • Upgrade to Service Pack 3.


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