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Gentoo: 200705-20 Normal: Blackdown Java Applet Escalation Risks

The Blackdown JDK and the Blackdown JRE suffer from the multiple unspecified vulnerabilities that already affected the Sun JDK and JRE.. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200705-20 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: Blackdown Java: Applet privilege escalation Date: May 26, 2007 Bugs: #161835 ID: 200705-20 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======= The Blackdown JDK and the Blackdown JRE suffer from the multiple unspecified vulnerabilities that already affected the Sun JDK and JRE. Background ========= Blackdown provides implementations of the Java Development Kit (JDK) and the Java Runtime Environment (JRE). Affected packages ================ ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 dev-java/blackdown-jdk < 1.4.2.03-r14 > = 1.4.2.03-r14 2 dev-java/blackdown-jre < 1.4.2.03-r14 > = 1.4.2.03-r14 ------------------------------------------------------------------- 2 affected packages on all of their supported architectures. ------------------------------------------------------------------- Description ========== Chris Evans has discovered multiple buffer overflows in the Sun JDK and the Sun JRE possibly related to various AWT and font layout functions. Tom Hawtin has discovered an unspecified vulnerability in the Sun JDK and the Sun JRE relating to unintended applet data access. He has also discovered multiple other unspecified vulnerabilities in the Sun JDK and the Sun JRE allowing unintended Java applet or applicationresource acquisition. Additionally, a memory corruption error has been found in the handling of GIF images with zero width field blocks. Impact ===== An attacker could entice a user to run a specially crafted Java applet or application that could read, write, or execute local files with the privileges of the user running the JVM, access data maintained in other Java applets, or escalate the privileges of the currently running Java applet or application allowing for unauthorized access to system resources. Workaround ========= Disable the "nsplugin" USE flag in order to prevent web applets from being run. Resolution ========= Since there is no fixed update from Blackdown and since the flaw only occurs in the applets, the "nsplugin" USE flag has been masked in the portage tree. Emerge the ebuild again in order to fix the vulnerability. Another solution is to switch to another Java implementation such as the Sun implementation (dev-java/sun-jdk and dev-java/sun-jre-bin). # emerge --sync # emerge --ask --oneshot --verbose "dev-java/blackdown-jdk" # emerge --ask --oneshot --verbose "dev-java/blackdown-jre" References ========= [ 1 ] CVE-2006-6731 https://www.cve.org/CVERecord?id=CVE-2006-6731 [ 2 ] CVE-2006-6736 https://www.cve.org/CVERecord?id=CVE-2006-6736 [ 3 ] CVE-2006-6737 https://www.cve.org/CVERecord?id=CVE-2006-6737 [ 4 ] CVE-2006-6745 https://www.cve.org/CVERecord?id=CVE-2006-6745 Availability =========== This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/200705-20 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 This email address is being protected from spambots. You need JavaScript enabled to view it. or alternatively, you may file a bug at https://bugs.gentoo.org/. License ====== Copyright 2007 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this documentare licensed under the Creative Commons - Attribution / Share Alike license. https://creativecommons.org/licenses/by-sa/2.5/ . The GLSA 200705-20 advisory highlights vulnerabilities in Blackdown Java related to applet escalation, outlining risks and mitigation steps to enhance security. Blackdown Java, Gentoo Security, Applet Risks, Escalation Threats. . LinuxSecurity.com Team

May 26, 2007 Gentoo