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Issue 772719 link

Starred by 2 users

Issue metadata

Status: Duplicate
Merged: issue 771155
Owner: ----
Closed: Oct 2017
Cc:
Components:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: ----
Type: Bug-Security



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Security: I can see the someone else's account mail inbox on frequently visited sites tab

Reported by lahari.a...@gmail.com, Oct 8 2017

Issue description

This template is ONLY for reporting security bugs. If you are reporting a
Download Protection Bypass bug, please use the "Security - Download
Protection" template. For all other reports, please use a different
template.

Please READ THIS FAQ before filing a bug: https://chromium.googlesource.com
/chromium/src/+/master/docs/security/faq.md

Please see the following link for instructions on filing security bugs:
https://www.chromium.org/Home/chromium-security/reporting-security-bugs

NOTE: Security bugs are normally made public once a fix has been widely
deployed.

VULNERABILITY DETAILS
When I open chrome, I get few suggestions of websites. One of which was a screenshot of the 
mail inbox. Since the font was big and pictures were inserted in the mail. I could make out the content of the mail. This shouldn't be the case. If its a mail or social media page, login form should be displayed instead of the actual mail or homepage 
VERSION
Chrome Version: Version 61.0.3163.100 (Official Build) (64-bit)

Operating System: MAC

REPRODUCTION CASE
Please include a demonstration of the security bug, such as an attached
HTML or binary file that reproduces the bug when loaded in Chrome. PLEASE
make the file as small as possible and remove any content not required to
demonstrate the bug.

Open your mail/fb/linkendin multiple times and you can see the suggestion of the opened mail or your homepage in the tab

FOR CRASHES, PLEASE INCLUDE THE FOLLOWING ADDITIONAL INFORMATION
Type of crash: [tab, browser, etc.]
Crash State: [see link above: stack trace, registers, exception record]
Client ID (if relevant): [see link above]

 
Components: UI>Browser>NewTabPage
Labels: Needs-Feedback
Can you elaborate on why you believe it's "someone else's mail inbox"? Chrome stores thumbnail images of the tabs you have visited (in the state that you visited them) and shows those thumbnails to you later. Which email service is seen? Is this an email service you use?

The fact that thumbnails might in rare circumstances contain something considered sensitive is effectively a dupe of  Issue 771155  and  Issue 670488  before it.
Mergedinto: 771155
Status: Duplicate (was: Unconfirmed)
Duping into  Issue 771155  for now since it looks like the report is describing a similar concern.
Note: As a workaround, you can remove the thumbnail by moving your mouse over it and clicking the small "x" that appears in the top right corner.

Hello All,

Me and my friends sometimes open the same mail page. But everyone has their own accounts. I could see my friend's mail opened in the thumbnail. As well as the facebook page opened. I think it is not appropriate to expose contents of one's mail and social media account in the thumbnail.

As for the WA, I think it works for a ethical person But how safe is it in internet cafe? Frequently visited sites shouldn't display the contents. If the font is bigger, anyone can see my otp or personal data


IMO thumbnails should only capture login page :) 
> Me and my friends sometimes open the same mail page. 
> But everyone has their own accounts.

When sharing a single device with someone you trust, the right way to go about it is to give each user a different Chrome profile: https://support.google.com/chrome/answer/2364824?co=GENIE.Platform%3DDesktop&hl=en or use Guest mode as appropriate.

> But how safe is it in internet cafe?

It's inherently unsafe to use an unknown device (e.g. Internet cafe computer) which is controlled by an untrusted party and shared with untrusted users. While you can use Guest/Incognito mode to attempt to preserve your privacy, other users or administrators could easily reconfigure the device to capture all of your private data. See https://chromium.googlesource.com/chromium/src/+/master/docs/security/faq.md#Why-arent-physically_local-attacks-in-Chromes-threat-model for discussion.
Labels: -Restrict-View-SecurityTeam allpublic

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