Security Advisories and Notifications

Security Advisory: (BEA06-109.00)

From: Oracle Corporation

Minor Subject: Multiple MBean vulnerabilities.

Product(s) Affected: WebLogic Server

Threat level: High

Remotely exploitable by a Java client.

Severity: High

Successfully exploiting the attack can result in invalid access to MBean attributes and/or a Denial of Service attack on the server.

A problem was identified that could potentially cause a security vulnerability in certain versions of WebLogic Server. Patches and an upgrade 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 allow RMI through their firewalls are vulnerable to this issue.

A remote Java client could exploit MBean vulnerabilities to access protected MBean attributes and/or launch a Denial-of-Service attack on the server.

This patch resolves the issue by changing MBean protection.

The following versions of WebLogic Server and WebLogic Express 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
  • 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 8.1

  1. Upgrade to WebLogic Server and WebLogic Express 8.1 Service Pack 5.

WebLogic Server and WebLogic Express version 7.0

  1. Upgrade to WebLogic Server and WebLogic Express 7.0 Service Pack 6.
  2. Download and apply the patch #7823770 from OracleMetaLink as per the instructions below:
    1. Select the Patches and Updates tab after logging in to OracleMetaLink.
    2. Click Simple Search.
    3. In the Search By field, select Patch Number from the list.
    4. Enter the patch number. The patch number may be different for different product releases and platforms.
    5. Select the platform (or choose generic as applicable)
    6. Click Go.
    7. Click Download to download the patch.
  3. Place the jar for the patch in the CLASSPATH before the weblogic.jar file.

WebLogic Server 7.0 Service Pack 7 will include the functionality in this patch.

WebLogic Server and WebLogic Express version 6.1

  1. Upgrade to WebLogic Server and WebLogic Express 6.1 Service Pack 7.
  2. Download and apply the patch #7823765 from OracleMetaLink as per the instructions below:
    1. Select the Patches and Updates tab after logging in to OracleMetaLink.
    2. Click Simple Search.
    3. In the Search By field, select Patch Number from the list.
    4. Enter the patch number. The patch number may be different for different product releases and platforms.
    5. Select the platform (or choose generic as applicable)
    6. Click Go.
    7. Click Download to download the patch.
  3. Place the jar for the patch in the CLASSPATH before the weblogic.jar file.

WebLogic Server 6.1 Service Pack 8 will include the functionality in this patch.

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.

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.

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

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

Thank you,

Oracle Corporation