Ubuntu Security Notice USN-1505-2
29th August, 2012
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.10
- Ubuntu 11.04
USN 1505-1 introduced a regression in the IcedTea-Web Java web browser plugin that prevented it from working with the Chromium web browser.
- icedtea-web - A web browser plugin to execute Java applets
USN-1505-1 fixed vulnerabilities in OpenJDK 6. As part of the update,
IcedTea-Web packages were upgraded to a new version. That upgrade
introduced a regression which prevented the IcedTea-Web plugin from
working with the Chromium web browser in Ubuntu 11.04 and Ubuntu 11.10.
This update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
It was discovered that multiple flaws existed in the CORBA (Common
Object Request Broker Architecture) implementation in OpenJDK. An
attacker could create a Java application or applet that used these
flaws to bypass Java sandbox restrictions or modify immutable object
data. (CVE-2012-1711, CVE-2012-1719)
It was discovered that multiple flaws existed in the OpenJDK font
manager's layout lookup implementation. A attacker could specially
craft a font file that could cause a denial of service through
crashing the JVM (Java Virtual Machine) or possibly execute arbitrary
It was discovered that the SynthLookAndFeel class from Swing in
OpenJDK did not properly prevent access to certain UI elements
from outside the current application context. An attacker could
create a Java application or applet that used this flaw to cause a
denial of service through crashing the JVM or bypass Java sandbox
It was discovered that OpenJDK runtime library classes could create
temporary files with insecure permissions. A local attacker could
use this to gain access to sensitive information. (CVE-2012-1717)
It was discovered that OpenJDK did not handle CRLs (Certificate
Revocation Lists) properly. A remote attacker could use this to gain
access to sensitive information. (CVE-2012-1718)
It was discovered that the OpenJDK HotSpot Virtual Machine did not
properly verify the bytecode of the class to be executed. A remote
attacker could create a Java application or applet that used this
to cause a denial of service through crashing the JVM or bypass Java
sandbox restrictions. (CVE-2012-1723, CVE-2012-1725)
It was discovered that the OpenJDK XML (Extensible Markup Language)
parser did not properly handle some XML documents. An attacker could
create an XML document that caused a denial of service in a Java
application or applet parsing the document. (CVE-2012-1724)
As part of this update, the IcedTea web browser applet plugin was
updated for Ubuntu 10.04 LTS, Ubuntu 11.04, and Ubuntu 11.10.
The problem can be corrected by updating your system to the following package version:
- Ubuntu 11.10:
- icedtea-6-plugin 1.2-2ubuntu0.11.10.3
- Ubuntu 11.04:
- icedtea-6-plugin 1.2-2ubuntu0.11.04.3
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to restart your web browser
to make all the necessary changes.