Security Advisories and Notifications

Subject: Security Advisory (BEA08-196.00)
From: Oracle Corporation
Minor Subject: A session fixation exploit could result in elevated privileges
Product(s) Affected: WebLogic Server and WebLogic Express

Threat level: Low
There is a potential for a session fixation attack allowing an unprivileged user access to another user’s session.

Severity: High
An attacker may be able to gain access to protected resources.

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

In order to exploit this vulnerability, an attacker must have access to the server’s console login page and have a non-administrator user account on that server. A session fixation vulnerability exists which can result in elevation of the attacker’s privileges. For more information about Session Fixation attacks, see:

This advisory corrects this issue by always regenerating an auth cookie on login.

Impact and CVSS Ratings:

CVSS Severity Score: 6.8 (High)
Attack Range (AV): Network
Attack Complexity (AC): Medium
Authentication Level (Au): None
Impact Type: Partial confidentiality, partial integrity and partial availability violation
Vulnerability Type: Elevation of Privilege
CVSS Base Score Vector: (AV:N/AC:M/Au:N/C:P/I:P/A:P)

Complete CVSS Guide:
Online Calculator:

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

  • WebLogic Server 10.0, on all platforms
  • WebLogic Server 9.2 released through Maintenance Pack 1, on all platforms
  • WebLogic Server 8.1 Service Pack 4 through Service Pack 6, on all platforms


Oracle strongly recommends the following course of actions.

WebLogic Server 10.0

Upgrade to WebLogic Server and WebLogic Express 10.0 Maintenance Pack 1.

WebLogic Server 9.2

Upgrade to WebLogic Server and WebLogic Express 9.2 Maintenance Pack 2.

WebLogic Server 8.1

  1. Upgrade to WebLogic Server and WebLogic Express 8.1 Service Pack 6
  2. Download and apply the patch #7825030 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.


Oracle recognizes the contributions from the following professional organizations for their assistance in investigating this matter: Mitja Kolsek (, of ACROS Security,


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