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Category:   Application (Generic)  >   IcedTea Vendors:   IcedTea Project
(Red Hat Issues Fix) IcedTea-Web Validation Flaws Let Remote Users Execute Arbitrary Applets
SecurityTracker Alert ID:  1035855
SecurityTracker URL:  http://securitytracker.com/id/1035855
CVE Reference:   CVE-2015-5234, CVE-2015-5235   (Links to External Site)
Date:  May 11 2016
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to versions 1.5.3, 1.6.1
Description:   Two vulnerabilities were reported in IcedTea-Web. A remote user can cause arbitrary applets to be executed on the target user's system.

The system does not properly validate applet URLs [CVE-2015-5234]. A remote user can create specially crafted HTML that, when loaded by the target user, will inject arbitrary applets into the '.appletTrustSettings' configuration file that can bypass user approval for execution.

The system does not properly validate the origin of unsigned applets [CVE-2015-5235]. A remote user can create specially crafted HTML that, when loaded by the target user, will execute arbitrary applets on the target user's system.

Andrea Palazzo of Truel IT reported these vulnerabilities.

Impact:   A remote user can cause arbitrary applets to be executed on the target user's system.
Solution:   Red Hat has issued a fix.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2016-0778.html

Vendor URL:  rhn.redhat.com/errata/RHSA-2016-0778.html (Links to External Site)
Cause:   Access control error, Input validation error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  6

Message History:   This archive entry is a follow-up to the message listed below.
Oct 9 2015 IcedTea-Web Validation Flaws Let Remote Users Execute Arbitrary Applets



 Source Message Contents

Subject:  [RHSA-2016:0778-01] Moderate: icedtea-web security, bug fix, and enhancement update

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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: icedtea-web security, bug fix, and enhancement update
Advisory ID:       RHSA-2016:0778-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2016-0778.html
Issue date:        2016-05-10
CVE Names:         CVE-2015-5234 CVE-2015-5235 
=====================================================================

1. Summary:

An update for icedtea-web is now available for Red Hat Enterprise Linux 6.

Red Hat Product Security has rated this update as having a security impact
of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available for each vulnerability from
the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64
Red Hat Enterprise Linux Desktop Optional (v. 6) - noarch
Red Hat Enterprise Linux HPC Node (v. 6) - x86_64
Red Hat Enterprise Linux HPC Node Optional (v. 6) - noarch
Red Hat Enterprise Linux Server (v. 6) - i386, x86_64
Red Hat Enterprise Linux Server Optional (v. 6) - noarch
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 6) - noarch

3. Description:

The IcedTea-Web project provides a Java web browser plug-in and an
implementation of Java Web Start, which is based on the Netx project. It
also contains a configuration tool for managing deployment settings for the
plug-in and Web Start implementations. IcedTea-Web now also contains
PolicyEditor - a simple tool to configure Java policies.

The following packages have been upgraded to a newer upstream version:
icedtea-web (1.6.2). (BZ#1275523)

Security Fix(es):

* It was discovered that IcedTea-Web did not properly sanitize applet URLs
when storing applet trust settings. A malicious web page could use this
flaw to inject trust-settings configuration, and cause applets to be
executed without user approval. (CVE-2015-5234)

* It was discovered that IcedTea-Web did not properly determine an applet's
origin when asking the user if the applet should be run. A malicious page
could use this flaw to cause IcedTea-Web to execute the applet without user
approval, or confuse the user into approving applet execution based on an
incorrectly indicated applet origin. (CVE-2015-5235)

Red Hat would like to thank Andrea Palazzo (Truel IT) for reporting these
issues.

For detailed information on changes in this release, see the Red Hat
Enterprise Linux 6.8 Release Notes and Red Hat Enterprise Linux 6.8
Technical Notes linked from the References section.

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

Web browsers using the IcedTea-Web browser plug-in must be restarted for
this update to take effect.

5. Bugs fixed (https://bugzilla.redhat.com/):

1233667 - CVE-2015-5234 icedtea-web: unexpected permanent authorization of unsigned applets
1233697 - CVE-2015-5235 icedtea-web: applet origin spoofing
1299976 - jnlp.LaunchException: Fatal: Initialization Error - NullPointerException SecurityDialogs.showMissingALACAttributePanel when codebase not specified

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:
icedtea-web-1.6.2-1.el6.src.rpm

i386:
icedtea-web-1.6.2-1.el6.i686.rpm
icedtea-web-debuginfo-1.6.2-1.el6.i686.rpm

x86_64:
icedtea-web-1.6.2-1.el6.x86_64.rpm
icedtea-web-debuginfo-1.6.2-1.el6.x86_64.rpm

Red Hat Enterprise Linux Desktop Optional (v. 6):

noarch:
icedtea-web-javadoc-1.6.2-1.el6.noarch.rpm

Red Hat Enterprise Linux HPC Node (v. 6):

Source:
icedtea-web-1.6.2-1.el6.src.rpm

x86_64:
icedtea-web-1.6.2-1.el6.x86_64.rpm
icedtea-web-debuginfo-1.6.2-1.el6.x86_64.rpm

Red Hat Enterprise Linux HPC Node Optional (v. 6):

noarch:
icedtea-web-javadoc-1.6.2-1.el6.noarch.rpm

Red Hat Enterprise Linux Server (v. 6):

Source:
icedtea-web-1.6.2-1.el6.src.rpm

i386:
icedtea-web-1.6.2-1.el6.i686.rpm
icedtea-web-debuginfo-1.6.2-1.el6.i686.rpm

x86_64:
icedtea-web-1.6.2-1.el6.x86_64.rpm
icedtea-web-debuginfo-1.6.2-1.el6.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 6):

noarch:
icedtea-web-javadoc-1.6.2-1.el6.noarch.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
icedtea-web-1.6.2-1.el6.src.rpm

i386:
icedtea-web-1.6.2-1.el6.i686.rpm
icedtea-web-debuginfo-1.6.2-1.el6.i686.rpm

x86_64:
icedtea-web-1.6.2-1.el6.x86_64.rpm
icedtea-web-debuginfo-1.6.2-1.el6.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 6):

noarch:
icedtea-web-javadoc-1.6.2-1.el6.noarch.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2015-5234
https://access.redhat.com/security/cve/CVE-2015-5235
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/6.8_Release_Notes/index.html
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/6.8_Technical_Notes/index.html

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2016 Red Hat, Inc.
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