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