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Starred by 2 users
Status: Fixed
Closed: Aug 2011
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 0
Type: Bug-Security

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XSS in chrome://appcache-internals
Project Member Reported by, Aug 1 2011 Back to list
There is an XSS hole in the chrome://appcache-internals page due to incorrect escaping of user input prior to display.

The vulnerability is possible when a known application has been installed, the example shown here is specific to "angry birds", but there is a corresponding vector for any app which is consistent across all installations of the app.

Chrome Version: [14.0.835] + [beta]
Operating System: presumably all, tested on linux 64 

This was likely introduced at r92263.

- Install angry birds from the app store.
- lanuch angry birds
- In a new tab, type into the location bar:

chrome://appcache-internals/?view-cache=aHR0cDovL2Nocm9tZS5hbmdyeWJpcmRzLmNvbS9tYW5pZmVzdC9mb3dsLm1hbmlmZXN0# onmouseover=alert(0)//

- page source contains:

<a href=chrome://appcache-internals/?view-entry=aHR0cDovL2Nocm9tZS5hbmdyeWJpcmRzLmNvbS9tYW5pZmVzdC9mb3dsLm1hbmlmZXN0|aHR0cDovL2Nocm9tZS5hbmdyeWJpcmRzLmNvbS8=|1409# onmouseover=alert(0)//>

mousing over links triggers JS execution.

I'll take this one as part of the CSP changes for chrome:// pages.
Status: Started
Another variation on the same idea -- tunnelling javascript:-URL through base64 decode:


CSP will catch this one, otherwise need to restrict to https?:// style urls.
Labels: SecSeverity-Low
Seems like low severity to me; let me know if you disagree Tom!
Status: Fixed
Low severity seems reasonable.
Fixed at

Labels: -Restrict-View-SecurityTeam Restrict-View-SecurityNotify
Status: FixUnreleased
Thanks for the fix. We'll put in a nod in our Chrome 15 release notes, then.
 Issue 91522  has been merged into this issue.
Thnx for fixing this!

Now that these pages can't run script at all... i feel more secure already :)
Labels: SecImpacts-Stable
Batch update.
Labels: CVE-2011-3877
Comment 11 by, May 15 2012
Status: Fixed
Marking old security bugs Fixed..
Project Member Comment 12 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.
Project Member Comment 13 by, Mar 10 2013
Labels: -Type-Security -SecSeverity-Low -SecImpacts-Stable Security-Severity-Low Security-Impact-Stable Type-Bug-Security
Project Member Comment 14 by, Mar 11 2013
Labels: -Area-Undefined
Project Member Comment 15 by, Mar 13 2013
Labels: Restrict-View-EditIssue
Labels: -Restrict-View-SecurityNotify -Restrict-View-EditIssue
Project Member Comment 17 by, Mar 21 2013
Labels: -Security-Severity-Low Security_Severity-Low
Project Member Comment 18 by, Mar 21 2013
Labels: -Security-Impact-Stable Security_Impact-Stable
Labels: allpublic
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