Closed Bug 382681 Opened 14 years ago Closed 14 years ago

Unsafe DOM mutation events in scrollable frame

Categories

(Core :: DOM: Events, defect)

x86
All
defect
Not set
critical

Tracking

()

RESOLVED FIXED

People

(Reporter: vladimir.sukhoy, Assigned: smaug)

References

Details

(Keywords: fixed1.8.1.5, testcase, verified1.8.0.13, Whiteboard: [sg:dos] keep private until 355548 is fixed on branches)

Attachments

(2 files, 1 obsolete file)

Using DOM mutation events it is possible to trash the UI so that the browser is unresponsive. See related bug 382568 and bug 355548 for more related test cases.
I get 100% cpu on trunk also. You mean that shouldn't happen?
if the UI is still responsive, then it is not so bad. On branches the UI stop working, and that is equivalent to "denial of service".
Oh, indeed, the UI gets unresponsive on trunk too.
Version: 1.8 Branch → Trunk
On linux (trunk/1.8) I get endless loop of JS's "too much recursion"s
(which as such isn't Security-Sensitive, IMO). 
bug 382568 and bug 355548 are crashers.
IMO, it is security sensitive because it suggests a pattern to exploit things in a way similar to those.
Should we file a metabug or whatever to keep these guys together?
Blocks: 382754
Ok, this testcase does crash 1.8 and 1.8.0 on MacOS for me it was just a matter of skipping a couple of legitimate mutation events and doing nasty stuff on the vulnerable one.
Attachment #266803 - Attachment is obsolete: true
Crashes on Linux too. Severity elevated, title adjusted...
Severity: normal → critical
Summary: Suspicious DOM mutation events in scrollable frame → Unsafe DOM mutation events in scrollable frame
Assignee: nobody → Olli.Pettay
Attached patch proposed patchSplinter Review
Just don't propagate any mutation events from native anonymous content.
IsAnonymousForEvents() is needed because XUL has its own implementation
for IsNativeAnonymous().
This fixes also Bug 382568.
Attachment #267939 - Flags: superreview?(jonas)
Attachment #267939 - Flags: review?(jonas)
Status: NEW → ASSIGNED
attachment 267939 [details] [diff] [review] fixes also bug 382700.
Note, I didn't change nsGenericDOMDataNode::HandleDOMEvent to
check nativeness, because it doesn't implement SetNativeAnonymous
properly and native anon text nodes are AFAIK always inside native
anonymous elements.
(This all ofc works properly on trunk.)
Blocks: 382568, 382700
Flags: blocking1.8.1.5?
Flags: blocking1.8.0.13?
Flags: wanted1.8.1.x+
Flags: wanted1.8.0.x+
Whiteboard: [sg:low dos] (related to worse bugs?) need r/sr=sicking
Attachment #267939 - Flags: superreview?(jonas)
Attachment #267939 - Flags: superreview+
Attachment #267939 - Flags: review?(jonas)
Attachment #267939 - Flags: review+
Attachment #267939 - Flags: approval1.8.1.5?
Attachment #267939 - Flags: approval1.8.0.13?
Flags: blocking1.8.1.5?
Flags: blocking1.8.1.5+
Flags: blocking1.8.0.13?
Flags: blocking1.8.0.13+
Whiteboard: [sg:low dos] (related to worse bugs?) need r/sr=sicking → [sg:low dos] (related to worse bugs?)
Comment on attachment 267939 [details] [diff] [review]
proposed patch

approved for 1.8.1.5 and 1.8.0.13, a=dveditz for release-drivers
Attachment #267939 - Flags: approval1.8.1.5?
Attachment #267939 - Flags: approval1.8.1.5+
Attachment #267939 - Flags: approval1.8.0.13?
Attachment #267939 - Flags: approval1.8.0.13+
Checked in to branches
Status: ASSIGNED → RESOLVED
Closed: 14 years ago
Resolution: --- → FIXED
Verified on Mozilla/5.0 (Macintosh; U; Intel Mac OS X; en-US; rv:1.8.0.13pre) Gecko/20070810 Firefox/1.5.0.13pre

Fx15012 crashed but Fx15013pre did not.
Flags: in-testsuite?
Whiteboard: [sg:low dos] (related to worse bugs?) → [sg:low dos] keep private until 355548 is fixed
Whiteboard: [sg:low dos] keep private until 355548 is fixed → [sg:dos] keep private until 355548 is fixed on branches
Group: core-security
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