Security Advisories and Notifications

Security Advisory: (BEA06-133.00)

From: Oracle Corporation

Minor Subject: Sensitive internal system data may be exposed on the wire.

Product(s) Affected: WebLogic Server

Threat level: Medium
WebLogic Server data could be snooped on transaction connections over non-secured channels.

Severity: High
Successfully exploiting the attack could allow an attacker to obtain sensitive server data.

A problem was identified that could potentially cause a security vulnerability in certain versions of WebLogic Server. Upgrades are 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

All sites that use JTA transactions that do not communicate over secured channels are vulnerable to this issue.

This advisory addresses a situation where sensitive system data could be sent over a non-secure channel when transactions are being used. This sensitive data could be maliciously used by an attacker.

This patch resolves the issue by introducing a system property named "weblogic.transaction.SecurityInteropMode". This property can be set to one of two values: "performance" or "compatibility". The default value of "performance" removes the sensitive data from the transaction packets. A value of "compatibility" is required for interacting with older versions of WebLogic Server. For more information see "Determining the Security Interoperability Mode" in:

This property must be configured identically on every server participating in global transactions.

The following versions of WebLogic Server are affected by this vulnerability:

  • WebLogic Server 8.1 released through Service Pack 4, on all platforms
  • WebLogic Server 7.0 released through Service Pack 6, on all platforms


Oracle strongly recommends the following course of actions.

WebLogic Server and WebLogic Express version 8.1

  • Upgrade to service pack 5.

WebLogic Server and WebLogic Express version 7.0

  • Upgrade to service pack 7.


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