Security Advisories and Notifications


Security Advisory: (BEA07-141.00)

From: Oracle Corporation

Minor Subject: Socket muxer threads may block when processing error pages under load.

Product(s) Affected: WebLogic Server and WebLogic Express

Threat level: Low
An attacker could render the server into a non-responsive state.

Severity: High
The server may enter into a state where all muxer threads are blocked.

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

A thread handling condition in the processing of error pages defined in web.xml can lead to a situation where all muxer threads can be blocked and the server may become unresponsive. Under specific circumstances, an attacker could exploit this vulnerability to create a denial of service attack.

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

  • WebLogic Server 9.0 on all platforms
  • WebLogic Server 8.1 released through Service Pack 5, on all platforms
  • WebLogic Server 7.0 released through Service Pack 6, on all platforms
  • WebLogic Server 6.1 released through Service Pack 7, on all platforms

II. SUGGESTED ACTION

Oracle strongly recommends the following course of actions.

WebLogic Server and WebLogic Express version 9.0

  1. Download and apply the 9.0 GA Combo patch #7824963 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. Download and apply the patch #7824148 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.
  3. Place the jar for the patch at the end of the PATCH_CLASSPATH.

WebLogic Server and WebLogic Express version 8.1

  • Upgrade to Service Pack 6.

WebLogic Server and WebLogic Express version 7.0

  • Upgrade to Service Pack 7.

WebLogic Server and WebLogic Express version 6.1

  1. Upgrade to service pack 7
  2. Download and apply the patch #7824139 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.
  3. Place the jar for the patch in the CLASSPATH before the weblogic.jar file.


SECURITY COMMUNICATIONS

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: http://www.oracle.com/technology/software/products/ias/bea_main.html

Note: Information about securing WebLogic Server and WebLogic Express can be found at http://edocs.bea.com/wls/docs103/security.html. Specific lockdown information is provided at http://e-docs.bea.com/wls/docs103/lockdown/index.html. 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: http://www.oracle.com/technology/deploy/security/wls-security.

Additional users who wish to register for product advisory distribution should follow the registration directions at: http://www.oracle.com/technology/deploy/security/alerts.htm.

Security issues can be reported to Oracle by following the directions at: http://www.oracle.com/technology/deploy/security/alerts.htm.

Thank you,
Oracle Corporation