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Issue metadata

Status: Duplicate
Merged: issue 703750
Owner: ----
Closed: Apr 2017
EstimatedDays: ----
NextAction: ----
OS: Mac
Pri: 2
Type: Bug-Security



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It's possible to craft phishing links with kurdish characters in the URL bar bypassing a recently patched security flaw. (see the reference section below)

Reported by wieser.b...@gmail.com, Apr 18 2017

Issue description

UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3074.0 Safari/537.36

Steps to reproduce the problem:
1. Register a domain with a kurdish unicode characters.
2. Create a hyperlink to that page.
3. Browse to the page in chrome.
4. Observe the browser displays the unicode instead of the puny code.

What is the expected behavior?
Chrome should display the punycode version of the URL instead of the kurdish unicode character. 

What went wrong?
Chrome recently fixed a security issue where unicode characters could be used in phishing attacks. The mitigation however is incomplete. It's possible to bypass the mitigations by using unicode chars from the Kurdish language. For example the following link: www.companîes.com
An attacker could register this domain and host a phishing page there. End users would believe they are visting companies.com 

References:
https://www.xudongz.com/blog/2017/idn-phishing/
https://codereview.chromium.org/2683793010

Did this work before? N/A 

Chrome version: 60.0.3074.0  Channel: canary
OS Version: OS X 10.12.4
Flash Version: Shockwave Flash 25.0 r0
 
Mergedinto: 703750
Status: Duplicate (was: Unconfirmed)
Project Member

Comment 2 by sheriffbot@chromium.org, Jul 26 2017

Labels: -Restrict-View-SecurityTeam allpublic
This bug has been closed for more than 14 weeks. Removing security view restrictions.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot
Labels: idn-spoof

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