CVE-2016-2817

Description

The WebExtension sandbox feature in browser/components/extensions/ext-tabs.js in Mozilla Firefox before 46.0 does not properly restrict principal inheritance during chrome.tabs.create and chrome.tabs.update API calls, which allows remote attackers to conduct Universal XSS (UXSS) attacks via a crafted extension that accesses a (1) javascript: or (2) data: URL.

Category

5.4
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.40%
Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory ubuntu.com Vendor Advisory gentoo.org Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory mozilla.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00005.html vendor advisory
http://www.securitytracker.com/id/1035692 vdb entry
http://lists.opensuse.org/opensuse-updates/2016-05/msg00038.html vendor advisory
http://www.ubuntu.com/usn/USN-2936-2 vendor advisory
https://security.gentoo.org/glsa/201701-15 vendor advisory
http://www.ubuntu.com/usn/USN-2936-1 vendor advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1227462
http://www.ubuntu.com/usn/USN-2936-3 vendor advisory
http://www.mozilla.org/security/announce/2016/mfsa2016-46.html vendor advisory

Frequently Asked Questions

What is the severity of CVE-2016-2817?
CVE-2016-2817 has been scored as a medium severity vulnerability.
How to fix CVE-2016-2817?
To fix CVE-2016-2817, 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-2016-2817 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2016-2817 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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