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Issue metadata

Status: Fixed
Email to this user bounced
Closed: Feb 2011
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Security

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Open popup in new tab using java applet

Reported by, Jan 23 2011

Issue description

It is possible to open a popup in new tab using java applet.
But it is not possible to open a popup on new window as with

Chrome Version: [8.0.552.224] + [stable]
                [10.0.647.0 (72276)] + [dev]
Operating System: [Ubuntu 10.04, 32 bit]

1. Copy attached MMotion.html and Pop.class to same folder.
2. Open MMotion.html in chrome.
   This page contains Pop.class applet.
3. Move the mouse over applet. will be loaded in new tab.

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@abarth: do you happen to know if it was always our intent to block pop-ups initiated by plug-ins?

Comment 3 by, Jan 27 2011

So the question is why the java applet can not open a popup on new window, right?
Yes, the test can open a new tab instead of a new window, it's because it didn't provide enough information to Chrome, please see logic in  ChromeClientImpl::show().
I don't know how to let the java applet provide those window features like what does.

Comment 4 by, Jan 27 2011

So, does this seem like a bug in the Java plugin, as opposed to Chrome?
I still suspect a Chrome bug. Chrome should be blocking _both_ an attempt to open a new window and an attempt to open a new tab.
Chrome knows when it is doing either of those things.

The only missing piece might be the awareness as to whether or not a user gesture is in progress?
yes. it seems to be user gesture is missing.

third_party/WebKit/Source/WebCore/bindings/v8/ScriptController.cpp's processingUserGesture method returns false in this code section.

if (!activeFrame)  //activeFrame is null
        return UserGestureIndicator::getUserGestureState() != DefinitelyNotProcessingUserGesture;
//UserGestureIndicator::getUserGestureState() equals to PossiblyProcessingUserGesture which is the default value in UserGestureIndicator.
//I could not find any place where PossiblyProcessingUserGesture is set to UserGestureIndicator other than it's default value.  

Status: Started
I'll have a look on Monday
@chamal.desilva: well, this is interesting. There's definitely a Chrome bug here.

There's also a bug in the official Java plug-in for Linux -- it always forces pop-ups to be allowed. You can see that your repro also works in Firefox, if the official Java plug-in is used.

If we used IcedTea (based on OpenJDK), things are different. It does not always force pop-ups, and Firefox blocks them whereas Chrome does not. This I can fix.
Hmm, in the Linux Firefox + IcedTea case, Firefox also has a bug: it erroneously blocks pop-ups resulting from a click in the plug-in.
Ok, so it's not a Firefox bug; it's just opposite bugs in official JRE vs. IcedTea JRE :)

official: always forces pop-ups on, regardless of whether a user click was involved.
IcedTea: always forces pop-ups off, regardless of whether a user click was involved.

Chrome is not obeying the IcedTea case.
Project Member

Comment 11 by, Feb 2 2011

The following revision refers to this bug:

r73417 | | Tue Feb 01 19:14:26 PST 2011

Changed paths:

Propagate the user gesture state. It is necessary to do correct pop-up blocking
if a plug-in tries to open an URL in a new frame.
No behaviour changes yet -- those require a separate change to the WebKit
chromium directory, that uses the propagated state.

BUG= 70538 

Review URL:
Labels: -Pri-0 Pri-2 SecSeverity-Low Mstone-11
Status: Fixed
Ok, I'm still fixing Linux test issues left right and center but the security bug is about as "Fixed" as it can be in Chrome.

Unfortunately, the official Java plug-in is fundamentally broken. It forces pop-ups on irregardless of whether the user clicked on anything or not. You can confirm this by taking Chrome out of the equation: try Windows + Firefox or Windows + IE, with Java installed. The pop-ups are not blocked, so nice discovery :)

The IcedTea JRE plug-in (more common on Linux) _never_ sets popups enabled, so pop-up blockers will block even if the window resulted from a user click. Chrome used to fail to block with IcedTea; that bug is now fixed. At least IceaTea users get relief. That said, I don't recommend anyone surfs with any form of Java plug-in widely enabled.
WebKit part of this change was:
Committed r77367: <>

And I'm piling test fixes and enhancements into
It's great. It works fine now :)
Labels: Type-Security
Labels: -Restrict-View-SecurityTeam Restrict-View-SecurityNotify CVE-2011-1304
Status: FixUnreleased
Labels: SecImpacts-Stable
Batch update.
Labels: -Restrict-View-SecurityNotify
Lifting view restrictions.
Status: Fixed
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Comment 20 by, Oct 13 2012

Labels: Restrict-AddIssueComment-Commit
This issue has been closed for some time. No one will pay attention to new comments.
If you are seeing this bug or have new data, please click New Issue to start a new bug.
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Comment 21 by, Mar 10 2013

Labels: -SecSeverity-Low -Mstone-11 -Type-Security -SecImpacts-Stable Security-Severity-Low Security-Impact-Stable M-11 Type-Bug-Security
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Comment 22 by, Mar 11 2013

Labels: -Area-Undefined
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Comment 23 by, Mar 13 2013

Labels: -Restrict-AddIssueComment-Commit Restrict-AddIssueComment-EditIssue
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Comment 24 by, Mar 21 2013

Labels: -Security-Severity-Low Security_Severity-Low
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Comment 25 by, Mar 21 2013

Labels: -Security-Impact-Stable Security_Impact-Stable
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Comment 26 by, Oct 1 2016

This bug has been closed for more than 14 weeks. Removing security view restrictions.

For more details visit - Your friendly Sheriffbot
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Comment 27 by, Oct 2 2016

This bug has been closed for more than 14 weeks. Removing security view restrictions.

For more details visit - Your friendly Sheriffbot
Labels: allpublic
Labels: CVE_description-submitted

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