Security Advisories and Notifications

Subject: Security Advisory (BEA07-174.00)
From: Oracle Corporation
Minor Subject: Non-trusted Applets may be able to elevate privileges
Product(s) Affected: BEA JRockit and BEA Products using BEA JRockit

Threat level: High
A malicious applet may be able to produce and exploit buffer overflow condition in the Java Runtime Environment.

Severity: High
An unauthenticated attacker may be able to grant itself privileges to read and write local files or execute local applications.

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

The Sun Java Runtime Environment contains vulnerabilities that can allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.

Sun Microsystems advised of two buffer overflow conditions that may allow non-trusted applets to elevate their privileges. For example, an applet might be able to grant itself permission to read and write local files, or execute local applications that are accessible to the user running the non-trusted applet. Earlier versions of BEA JRockit supporting applets may be affected by these issues. For more information, please see the following advisory from Sun Microsystems:

Impact and CVSS Ratings:

CVSS Severity Score: 8.0 (High)
Attack Range (AV): Remote
Attack Complexity (AC): High
Authentication Level (Au): Not Required
Impact Type: Elevation of privilege. Complete confidentiality, integrity, and availability violation
Vulnerability Type: Elevation of Privilege, Buffer Overflow
CVSS Base Score Vector: (AV:R/AC:H/Au:NR/C:C/I:C/A:C/B:N)

Complete CVSS Guide:
Online Calculator:

The following versions of BEA JRockit are affected by this vulnerability:

  • Releases prior to BEA JRockit R26.0.0 1.4.2_07 and BEA JRockit R26.0.0 1.5.0_04

This vulnerability does not affect JRockit 7.0 SP6 RP1 JDK 1.3.1_20.

BEA JRockit version R26.0.0 or later cannot be used to run applets within a browser since it is primarily a server oriented JVM. If you upgrade to JRockit R27.1.0, this will prevent you from accidentally running applets with JRockit.


Oracle strongly recommends the following course of actions.

If you want to prevent applets from running on your client applications upgrade to the latest BEA JRockit. You can also upgrade to any other JVM that support applets with the appropriate security patches installed.

  • The recommended action is to upgrade to R27.2, although this will disable applets from running on your client applications.


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