Security Advisories and Notifications


Security Advisory: (BEA07-134.00)

From: Oracle Corporation

Minor Subject: SSL libraries may be vulnerable to unauthorized information disclosure

Product(s) Affected: WebLogic Server

Threat level: Low
A user with remote or local access and sufficient time may be able to exploit this issue.

Severity: Medium
Successfully exploiting the attack may result in determination of plaintext in the SSL stream.

A problem was identified that could potentially cause a security vulnerability in certain versions of WebLogic Server. Patches and 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 SSL may be vulnerable to this issue.

Exploiting this issue requires being able to snoop SSL packets, launch a man-in-the-middle attack to inject crafted ciphertext blocks into the SSL connection, and then time error responses.

An attacker with access to multiple SSL or TLS connections that contain a fixed plaintext block in common who has the ability to inject their own ciphertext blocks into the connection in place of the correct plaintext blocks may be able to time the error response. This might eventually allow them to determine the value of the plaintext block.

This advisory resolves the issue by upgrading to a new fixed library in WebLogic Server 7.0 and 8.1 and patching the libraries in WebLogic Server 6.1.

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

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

Applications using the Certicom stack (the default): Upgrade to Service Pack 4.

Applications using the Phaos stack (legacy): Upgrade to Service Pack 6.

WebLogic Server and WebLogic Express version 7.0

Applications using the Certicom stack (the default): Upgrade to Service Pack 7.

Applications using the Phaos stack libraries (legacy):

  1. Upgrade to Service Pack 7.
  2. Download and apply the patch #7823143 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.

WebLogic Server and WebLogic Express version 6.1

  1. Upgrade to WebLogic Server 6.1 Service Pack 7.
  2. Download and apply the patch #7823125 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