CVE-2017-7834

Description

A "data:" URL loaded in a new tab did not inherit the Content Security Policy (CSP) of the original page, allowing for bypasses of the policy including the execution of JavaScript. In prior versions when "data:" documents also inherited the context of the original page this would allow for potential cross-site scripting (XSS) attacks. This vulnerability affects Firefox < 57.

Category

6.1
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.99% Top 25%
Vendor Advisory mozilla.org
Affected: Mozilla Firefox
Published at:
Updated at:

References

Link Tags
https://bugzilla.mozilla.org/show_bug.cgi?id=1358009 issue tracking permissions required
https://www.mozilla.org/security/advisories/mfsa2017-24/ vendor advisory
http://www.securityfocus.com/bid/101832 vdb entry third party advisory
http://www.securitytracker.com/id/1039803 vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2017-7834?
CVE-2017-7834 has been scored as a medium severity vulnerability.
How to fix CVE-2017-7834?
To fix CVE-2017-7834, 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-2017-7834 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2017-7834 is being actively exploited. 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-2017-7834?
CVE-2017-7834 affects Mozilla Firefox.
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