CVE-2016-9904

Name: CVE-2016-9904
Creator: NVD / NIST
Published: 2018-06-11T21:29:02.467+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.75%

Last modified Jun 17, 2026

CVE-2016-9904 is a vulnerability of currently unknown severity. 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. EPSS estimates a 2.75% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

2.75%

84.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions
Redhat	Enterprise Linux Desktop	5.0
Redhat	Enterprise Linux Desktop	6.0
Redhat	Enterprise Linux Desktop	7.0
Redhat	Enterprise Linux Server	5.0
Redhat	Enterprise Linux Server	6.0
Redhat	Enterprise Linux Server	7.0
Redhat	Enterprise Linux Workstation	5.0
Redhat	Enterprise Linux Workstation	6.0
Redhat	Enterprise Linux Workstation	7.0
Debian	Debian Linux	8.0
Mozilla	Firefox	< 45.6.0
Mozilla	Firefox	< 51.0
Mozilla	Thunderbird	< 45.6.0

References

http://rhn.redhat.com/errata/RHSA-2016-2946.htmlThird Party Advisory
http://www.securityfocus.com/bid/94885Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1037461Third Party Advisory, VDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1317936Issue Tracking, Patch
https://security.gentoo.org/glsa/201701-15Third Party Advisory
https://www.debian.org/security/2017/dsa-3757Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2016-94/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2016-95/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2016-96/Vendor Advisory
http://rhn.redhat.com/errata/RHSA-2016-2946.htmlThird Party Advisory
http://www.securityfocus.com/bid/94885Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1037461Third Party Advisory, VDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1317936Issue Tracking, Patch
https://security.gentoo.org/glsa/201701-15Third Party Advisory
https://www.debian.org/security/2017/dsa-3757Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2016-94/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2016-95/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2016-96/Vendor Advisory

Timeline

Published: Jun 11, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-9904?

How severe is CVE-2016-9904?

Severity scoring for CVE-2016-9904 is pending analysis. The EPSS model estimates a 2.75% probability of exploitation in the next 30 days.

How do I fix CVE-2016-9904?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-9904?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST