Security Advisories and Notifications

Security Advisory: (BEA03-31.00)

From: Oracle Corporation

Minor Subject: Patches available to prevent invalid SSL certificate chain vulnerability

Product(s) Affected: WebLogic Server and Express, Tuxedo, and WebLogic Enterprise

Threat level: Moderate

Severity: High

Recently we identified a problem that could potentially cause a security vulnerability in certain versions of WebLogic Server and Express, Tuxedo, and WebLogic Enterprise. Patches are available to correct this problem (see section II below). 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.


The vulnerability allows certificates issued to individual users to be treated as though they were issued to a certificate authority. This vulnerability can be exploited to impersonate any user. Further explanation can be found in documentation for a similar vulnerability found in Microsoft Internet Explorer at

The vulnerability can affect both Tuxedo and WebLogic Server installations.
  • Tuxedo installations:
    This vulnerability can occur whenever Tuxedo client programs (C++ or Java clients) are receiving X.509 certificates from a server over SSL. This can happen whether or not the server is a Tuxedo application or some other other non-Tuxedo server. This vulnerability can also occur whenever a Tuxedo application server is receiving certificates from client programs during two-way authentication.
  • WebLogic Server installations:
    This vulnerability can occur whenever the WebLogic Server is receiving a certificate. This includes SSL communication between the server and a Web server proxy as well as between the WebLogic Server and a client talking 2-way SSL (either HTTPS, IIOPS, or T3S). It also happens anytime a WebLogic Server fat client communicates with a server over SSL, whether or not the server is a WebLogic Server.
The following versions of Tuxedo, WebLogic Enterprise, and WebLogic Server and Express are affected by this vulnerability
  • Tuxedo 8.0 and Tuxedo 8.1, all platforms
  • WebLogic Enterprise 5.0.1 and WebLogic Enterprise 5.1,all platforms
  • WebLogic Server and Express 5.1, all platforms
  • WebLogic Server and Express 6.1, all platforms
  • WebLogic Server and Express 7.0 or, all platforms


Oracle strongly recommends the following course of actions:

  • Tuxedo 8.0:
    • Apply Rolling Patch 166 or later.

  • Tuxedo 8.1:
    • Apply Rolling Patch 12 or later.

  • WebLogic Enterprise 5.0:
    • Apply Rolling Patch 59 or later.

  • WebLogic Enterprise 5.1:
    • Apply Rolling Patch 145 or later.
Rolling Patches can be obtained from BEA Customer Support. Contact Oracle Customer Support (1-888-223-1711). For a complete list of Oracle Customer Support contact numbers, go to:

WebLogic Server and Express
  • WebLogic Server and Express 5.1:
    • Upgrade to Service Pack 13 and download and apply the patch #7824646 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.

  • WebLogic Server and Express 6.1:
    • Upgrade to Service Pack 5.
Users of the NSAPI Plugin, ISAPI Plugin, or Apache Plugin should upgrade to the 6.1 Service Pack 5 version of the Plugin.
  • WebLogic Server and Express 7.0 or
    • Upgrade to Service Pack 2.
Users of the NSAPI Plugin, ISAPI Plugin, or Apache Plugin should upgrade to the 7.0 Service Pack 2 version of the Plugin.


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