Door Spiff: Zou het probleem mogelijk kunnen zitten in het updaten van een Java 6 serie versie met een Java 7 serie versie?
Als dat zo zou zijn, dan is dat hoe dan ook beroerd, die oude versie zou automatisch verwijderd horen te worden, zo lijkt me.
Uit
http://weblogs.java.net/blog/enicholas/archive/2006/10/what_you_should_1.html:
Door Ethan Nicholas op 2006-10-06: [...]
Java has always allowed you to keep multiple versions installed on the same computer at the same time. Whether you love this particular feature or hate it, there's no denying that it can be useful at times. Certainly as a developer I appreciate being able to have Java 5 and Java 6 on the same machine at the same time, and I know enterprises prefer to be able to certify their internal software against exactly one version of Java without worrying about employees accidentally changing the Java version out from under them.
But as with all significant decisions, there is no single right answer. What's right for developers and enterprises isn't necessarily as great in the consumer market, where users would generally prefer not to leave old versions of the software lying around after an upgrade.
[...]
2. Do I need to remove old versions of Java?
No. Applets and sandboxed Java Web Start programs aren't allowed to access older versions of Java. They don't pose any threat in the first place, so removing them won't change anything. If you do decide to remove older versions of Java, you need to be sure that none of the applications on your computer are using them first.
[...]
WRONG ANSWER! Lees verder...
Uit
http://blog.washingtonpost.com/securityfix/2008/07/remnant_java_versions_again_po.html:
Door Brian Krebs op 2008-07-10: [...]
Roughly two years ago, Sun quietly acknowledged in a security update that it had fixed a very similar flaw -- which allowed attackers to invoke older, insecure versions even if the latest, patched version was installed and set as the authoritative version to be used by both the operating system and the user's default Web browser.
[...]
That fix, bundled with JRE 5.0 Update 8, implemented an approach Sun called "secure static versioning." If you check out the "add-ons" installed in Internet Explorer, for example, (in IE7, click Tools, Internet Options, Programs, then Manage Add-Ons) you should see the filename of the plug-in that undertakes this task, called "ssv.dll".
[...]
Heasman said he ran the plug-in through a series of tests and eventually found a way to bypass its security checks and present the user with something of a Catch-22: Namely, a pop-up dialog box that says basically, "Hey, this Web site wants to run a Java program using an older version of Java than what's installed, is that okay?" What Heasman found was that even if the user clicks no to this prompt, he still could force the browser or operating system to revert to an older, vulnerable version of Java still installed on the system.
[...]
Kortom, oude Java versies op je systeem blijken onder bepaalde omstandigheden toch bereikbaar via je webbrowser. Om die reden, uit
http://www.java.com/nl/download/faq/remove_olderversions.xml:
door Oracle, actueel: Waarom moet ik oudere versies van Java verwijderen van mijn systeem?
[...]
Het aanhouden van oude en niet meer ondersteunde versies van Java op uw systeem is een ernstig beveiligingsrisico.
[...]
Vanuit die pagina vind je aanwijzingen hoe je (oudere) Java versies kunt verwijderen van je systeem.
@Ilja. _\\// waarom sommige van je PC's wel en andere niet updaten weet ik niet. Draait op alle systemen "jus", de Java Update Scheduler service? Als de check-for-updates frequentie op bijv. elke week staat, kan het zijn dat je systemen onderling "out sync" zijn en je max 6 dagen moet wachten. Kan die JUS naar buiten connecten?