CVE-2016-9904

Description

An attacker could use a JavaScript Map/Set timing attack to determine whether an atom is used by another compartment/zone in specific contexts. This could be used to leak information, such as usernames embedded in JavaScript code, across websites. This vulnerability affects Firefox < 50.1, Firefox ESR < 45.6, and Thunderbird < 45.6.

Category

7.5
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 1.26% Top 25%
Vendor Advisory gentoo.org Vendor Advisory debian.org Vendor Advisory redhat.com Vendor Advisory mozilla.org Vendor Advisory mozilla.org Vendor Advisory mozilla.org
Affected: Mozilla Firefox
Affected: Mozilla Firefox ESR
Affected: Mozilla Thunderbird
Published at:
Updated at:

References

Link Tags
https://www.mozilla.org/security/advisories/mfsa2016-94/ vendor advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1317936 issue tracking patch
https://www.mozilla.org/security/advisories/mfsa2016-95/ vendor advisory
http://www.securityfocus.com/bid/94885 vdb entry third party advisory
http://www.securitytracker.com/id/1037461 vdb entry third party advisory
https://security.gentoo.org/glsa/201701-15 third party advisory vendor advisory
https://www.debian.org/security/2017/dsa-3757 third party advisory vendor advisory
https://www.mozilla.org/security/advisories/mfsa2016-96/ vendor advisory
http://rhn.redhat.com/errata/RHSA-2016-2946.html third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2016-9904?
CVE-2016-9904 has been scored as a high severity vulnerability.
How to fix CVE-2016-9904?
To fix CVE-2016-9904, 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-2016-9904 being actively exploited in the wild?
It is possible that CVE-2016-9904 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-2016-9904?
CVE-2016-9904 affects Mozilla Firefox, Mozilla Firefox ESR, Mozilla Thunderbird.
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