CVE-2017-5451 Other in Firefox

Medium 4.3 Published Updated

Attackers can spoof the address bar via onblur events, misleading users about the loaded site's identity in Firefox and Thunderbird.

Exploited in the wild
Not known
Login needed
Not needed
Attackable
Over the internet
Victim action needed
A user has to click or open something
Fix
Available

What is CVE-2017-5451?

CVE-2017-5451 is a medium-severity vulnerability in Mozilla Firefox, published on 11 Jun 2018. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

A mechanism to spoof the addressbar through the user interaction on the addressbar and the "onblur" event. The event could be used by script to affect text display to make the loaded site appear to be different from the one actually loaded within the addressbar. This vulnerability affects Thunderbird < 52.1, Firefox ESR < 52.1, and Firefox < 53.

Weakness: CWE-20

Which versions are affected by CVE-2017-5451?

It affects 8 products.

Products include Mozilla Firefox, Mozilla Thunderbird, Redhat Enterprise Linux, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Server Aus and 2 more.

How do I fix CVE-2017-5451?

Upgrade to a fixed version.

Is CVE-2017-5451 being exploited?

There is no known exploitation of CVE-2017-5451 in the wild and no public exploit code.

All Mozilla Firefox vulnerabilities

Sources

Also known as GHSA-vvjr-2r7m-cm7q, UBUNTU-CVE-2017-5451.

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