This isn't really a security issue, it is how URLs work. The value
specified before the "@" is considered to be the username. See RFC 3986.
(https://www.ietf.org/rfc/rfc3986.txt)
That being said, while Chrome simply allows the username, firefox does
display a warning to the user.
** Changed in: webbrowser-app (Ubuntu)
Status: New => Confirmed
** Information type changed from Private Security to Public
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https://bugs.launchpad.net/bugs/1620323
Title:
Address Bar Spoofing in Default Browser of Ubuntu LTS.
Status in webbrowser-app package in Ubuntu:
Confirmed
Bug description:
Hello ,
The default browser of the Ubuntu LTS is vulnerable to Address Bar
Spoofing.
Steps :
Ubuntu browser allows attacker to spoof the web-browser by just using '@'
symbol.
Example : https://[email protected] , this will redirect a user or a victim
to bing.com rather than google.com.
An attacker can take an advantage of it and may redirect it to any malicious
website.
Example : https://[email protected] , similarly this will also
redirect to attacker.com rather than facebook.com.
There are various scenario to exploit , one of it using BeeF using [hook.js]
which is browser based exploitation and as such many more.
Example: https://[email protected]/hook.js
Well where as hook.js is a component of BeeF, which allows attacker to leads
to browser based exploitation
As far i recommend and request there should be a pop-up for this as a
mitigation that some one is trying to tamper the URL.
Kindly have a look on the attached Video POC , to clear the above scenario.
I would be happy to hear from the team.
Thank you
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