USN-1804-2: IcedTea-Web regression

23 April 2013

icedtea-web regression

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 12.04 LTS
  • Ubuntu 11.10


Due to a regression, IcedTea-Web might not be able to access some sites.

Software Description

  • icedtea-web - A web browser plugin to execute Java applets


USN-1804-1 fixed vulnerabilities in IcedTea-Web. This update introduced a regression with the Java Network Launching Protocol (JNLP) when fetching content over SSL under certain configurations, such as when using the community-supported IcedTead 7 browser plugin. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Jiri Vanek discovered that IcedTea-Web would use the same classloader for applets from different domains. A remote attacker could exploit this to expose sensitive information or potentially manipulate applets from other domains. (CVE-2013-1926)

It was discovered that IcedTea-Web did not properly verify JAR files and was susceptible to the GIFAR attack. If a user were tricked into opening a malicious website, a remote attacker could potentially exploit this to execute code under certain circumstances. (CVE-2013-1927)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 12.04 LTS
icedtea-7-plugin - 1.2.3-0ubuntu0.12.04.2
icedtea-netx - 1.2.3-0ubuntu0.12.04.2
Ubuntu 11.10
icedtea-netx - 1.2.3-0ubuntu0.11.10.2

To update your system, please follow these instructions:

After a standard system update you need to restart your browser to make all the necessary changes.