Security Advisories and Notifications


Subject: Security Advisory (BEA08-197.00)
From: Oracle Corporation
Minor Subject: Account lockout can be bypassed, exposing the account to a brute-force password attack
Product(s) Affected: WebLogic Server and WebLogic Express

Threat level: Medium
Password lockout resulting from invalid login attempts can be bypassed.

Severity: Medium
A successful brute-force password attack may result in unauthorized access to protected user accounts.

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

In order to avoid brute force credential attacks, WebLogic Server has a mechanism that locks the corresponding user account after a certain number of invalid login attempts. By default, the account is locked after 5 invalid login attempts and remains locked for 30 minutes.

Even after a user has been locked out, logon requests to certain carefully constructed URLs can still give hints as to whether the password is correct or not. This allows a sophisticated attacker to successfully run a brute force password attack, a dictionary attack, or other similar attacks.

The patch associated with this advisory corrects the problem. All sites that use servlets are vulnerable to this problem.

Impact and CVSS Ratings:

CVSS Severity Score: 6.8 (Medium)
Attack Range (AV): Network
Attack Complexity (AC): Medium
Authentication Level (Au): None
Impact Type: Unauthorized uploading of files. Partial confidentiality, integrity and 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: http://www.first.org/cvss/cvss-guide.html
Online Calculator: http://nvd.nist.gov/cvss.cfm?calculator&version=2

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

  • WebLogic Server 10.0 released through Maintenance Pack 1, on all platforms
  • WebLogic Server 9.2 released through Maintenance Pack 2, on all platforms
  • WebLogic Server 9.1 on all platforms
  • WebLogic Server 9.0 on all platforms
  • WebLogic Server 8.1 released through Service Pack 6, on all platforms
  • WebLogic Server 7.0 released through Service Pack 7, on all platforms

II. SUGGESTED ACTION

Oracle strongly recommends the following course of actions.

WebLogic Server 10.0

  1. Upgrade to WebLogic Server and WebLogic Express 10.0 Maintenance Pack 1
  2. Use the Smart Update tool to install the 10.0MP1 patch for CR328282.
  3. Note: All WebLogic Server instances are required to be restarted for the patch to take effect.
    WebLogic Server 10.0 Maintenance Pack 2 will include this functionality.

WebLogic Server 9.2

  1. Upgrade to WebLogic Server and WebLogic Express 9.2 Maintenance Pack 2.
  2. Use the Smart Update tool to install the 9.2MP2 patch for CR328282.
  3. Note: All WebLogic Server instances are required to be restarted for the patch to take effect.
    WebLogic Server 9.2 Maintenance Pack 3 will include this functionality.

WebLogic Server 9.1

  1. Use the Smart Update tool to install the 9.1 patch for CR328282.
  2. Note: All WebLogic Server instances are required to be restarted for the patch to take effect.

WebLogic Server 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 #7824451 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.
  4. Note: All WebLogic Server instances are required to be restarted for the patch to take effect.

WebLogic Server 8.1

  1. Upgrade to WebLogic Server and WebLogic Express 8.1 Service Pack 6.
  2. Download and apply the patch #7824446 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
  4. Note: All WebLogic Server instances are required to be restarted for the patch to take effect.

WebLogic Server 7.0

  1. Upgrade to WebLogic Server and WebLogic Express 7.0 Service Pack 7.
  2. Download and apply the patch #7824439 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.
  4. Note: All WebLogic Server instances are required to be restarted for the patch to take effect.


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