(Gentoo Issues Fix) Sun Java Plug-in Java-to-Javascript Bug Lets Remote Applets Execute Arbitrary Code
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SecurityTracker Alert ID: 1012355 |
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SecurityTracker URL: http://securitytracker.com/id/1012355
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CVE Reference:
CAN-2004-1029
(Links to External Site)
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Date: Nov 30 2004
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Impact:
Disclosure of system information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information, User access via network
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Fix Available: Yes Vendor Confirmed: Yes
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Version(s): prior to 1.4.2_06
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Description:
iDEFENSE reported a vulnerability in Sun's Java plug-in. A remote applet can bypass Java sandbox security mechanisms and execute arbitrary code on the target system.
It is reported that a remote user can create an applet that, when loaded by the target user, can exploit a flaw in the plug-in's Java to Javascript data exchange to bypass access controls and load an unsafe Java class. The applet can upload or download arbitrary files and execute arbitrary files with the privileges of the target user.
Web browsers using the plug-in with an affected version of the Java Virtual Machine are vulnerable.
The vendor was notified on June 29, 2004.
The original advisory is available at:
http://www.idefense.com/application/poi/display?id=158&type=vulnerabilities
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Impact:
A remote user can execute arbitrary code on the target user's system.
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Solution:
Gentoo has released a fix and indicates that all Sun JDK users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-java/sun-jdk-1.4.2.06"
All Sun JRE users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-java/sun-jre-bin-1.4.2.06"
All Blackdown JDK users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-java/blackdown-jdk-1.4.2.01"
All Blackdown JRE users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-java/blackdown-jre-1.4.2.01"
Gentoo adds that you should unmerge all vulnerable versions to be fully protected.
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Vendor URL: java.sun.com/ (Links to External Site)
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Cause:
Access control error
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Underlying OS:
Linux (Gentoo)
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Message History:
This archive entry is a follow-up to the message listed below.
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Source Message Contents
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Date: Mon, 29 Nov 2004 22:35:13 +0100
Subject: [gentoo-announce] [ GLSA 200411-38 ] Sun and Blackdown Java: Applet privilege escalation
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Gentoo Linux Security Advisory GLSA 200411-38
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http://security.gentoo.org/
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Severity: Normal
Title: Sun and Blackdown Java: Applet privilege escalation
Date: November 29, 2004
Bugs: #72172, #72221
ID: 200411-38
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Synopsis
========
The Java plug-in security in Sun and Blackdown Java environments can be
bypassed to access arbitrary packages, allowing untrusted Java applets
to perform unrestricted actions on the host system.
Background
==========
Sun and Blackdown both provide implementations of Java Development Kits
(JDK) and Java Runtime Environments (JRE). All these implementations
provide a Java plug-in that can be used to execute Java applets in a
restricted environment for web browsers.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 dev-java/sun-jdk < 1.4.2.06 >= 1.4.2.06
2 dev-java/sun-jre-bin < 1.4.2.06 >= 1.4.2.06
3 dev-java/blackdown-jdk < 1.4.2.01 >= 1.4.2.01
4 dev-java/blackdown-jre < 1.4.2.01 >= 1.4.2.01
-------------------------------------------------------------------
# Package 1 [dev-java/sun-jdk] only applies to x86 and AMD64
users.
# Package 2 [dev-java/sun-jre-bin] only applies to x86 and AMD64
users.
# Package 3 [dev-java/blackdown-jdk] only applies to x86 and
AMD64 users.
# Package 4 [dev-java/blackdown-jre] only applies to x86 and
AMD64 users.
-------------------------------------------------------------------
4 affected packages; please see the notes above...
-------------------------------------------------------------------
Description
===========
All Java plug-ins are subject to a vulnerability allowing unrestricted
Java package access.
Impact
======
A remote attacker could embed a malicious Java applet in a web page and
entice a victim to view it. This applet can then bypass security
restrictions and execute any command or access any file with the rights
of the user running the web browser.
Workaround
==========
As a workaround you could disable Java applets on your web browser.
Resolution
==========
All Sun JDK users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-java/sun-jdk-1.4.2.06"
All Sun JRE users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-java/sun-jre-bin-1.4.2.06"
All Blackdown JDK users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-java/blackdown-jdk-1.4.2.01"
All Blackdown JRE users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-java/blackdown-jre-1.4.2.01"
Note: You should unmerge all vulnerable versions to be fully protected.
References
==========
[ 1 ] iDEFENSE Security Advisory 11.22.04
http://www.idefense.com/application/poi/display?id=158&type=vulnerabilities
[ 2 ] CAN-2004-1029
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1029
[ 3 ] Blackdown Security Advisory 2004-01
http://www.blackdown.org/java-linux/java2-status/security/Blackdown-SA-2004-01.txt
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200411-38.xml
Concerns?
=========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.
License
=======
Copyright 2004 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).
The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.0
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