Ubuntu Security Notice 1804-2 - 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. Various other issues were also addressed.
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Mandriva Linux Security Advisory 2013-146 - Multiple vulnerabilities has been discovered and corrected in icedtea-web. It was discovered that the IcedTea-Web plug-in incorrectly used the same class loader instance for applets with the same value of the codebase attribute, even when they originated from different domains. A malicious applet could use this flaw to gain information about and possibly manipulate applets from different domains currently running in the browser. The IcedTea-Web plug-in did not properly check the format of the downloaded Java Archive files. This could cause the plug-in to execute code hidden in a file in a different format, possibly allowing attackers to execute code in the context of web sites that allow uploads of specific file types, known as a GIFAR attack. The updated packages have been upgraded to the 1.3.2 version which is not affected by these issues.
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Ubuntu Security Notice 1804-1 - 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. 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. Various other issues were also addressed.
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Red Hat Security Advisory 2013-0753-01 - 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. It was discovered that the IcedTea-Web plug-in incorrectly used the same class loader instance for applets with the same value of the codebase attribute, even when they originated from different domains. A malicious applet could use this flaw to gain information about and possibly manipulate applets from different domains currently running in the browser.
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