full-disclosure-uk May 2007 archive
Main Archive Page > Month Archives  > full-disclosure-uk archives
full-disclosure-uk: [Full-disclosure] [ GLSA 200705-20 ] Blackdo

[Full-disclosure] [ GLSA 200705-20 ] Blackdown Java: Applet privilege escalation

From: Raphael Marichez <falco_at_nospam>
Date: Sat May 26 2007 - 19:42:58 GMT
To: gentoo-announce@gentoo.org

  • - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200705-20
  • - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://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 application resource 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
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6731   [ 2 ] CVE-2006-6736
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6736   [ 3 ] CVE-2006-6737
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6737   [ 4 ] CVE-2006-6745
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6745

Availability


This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

  http://security.gentoo.org/glsa/glsa-200705-20.xml

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 security@gentoo.org or alternatively, you may file a bug at http://bugs.gentoo.org.

License


Copyright 2007 Gentoo Foundation, Inc; referenced text belongs to its owner(s).

The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5



Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/