CVE-2017-5420

Public Exploit

Description

A "javascript:" url loaded by a malicious page can obfuscate its location by blanking the URL displayed in the addressbar, allowing for an attacker to spoof an existing page without the malicious page's address being displayed correctly. This vulnerability affects Firefox < 52.

Category

6.5
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.76% Top 30%
Vendor Advisory mozilla.org Vendor Advisory mozilla.org
Affected: Mozilla Firefox
Published at:
Updated at:

References

Link Tags
https://www.mozilla.org/security/advisories/mfsa2017-05/ vendor advisory
http://www.securitytracker.com/id/1037966 vdb entry third party advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1284395 issue tracking patch vendor advisory exploit
http://www.securityfocus.com/bid/96692 vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2017-5420?
CVE-2017-5420 has been scored as a medium severity vulnerability.
How to fix CVE-2017-5420?
To fix CVE-2017-5420, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-5420 being actively exploited in the wild?
It is possible that CVE-2017-5420 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-5420?
CVE-2017-5420 affects Mozilla Firefox.
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