CVE-2016-9904

moderate-risk

Published 2018-06-11

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.

Do I need to act?

1.2% chance of exploitation in next 30 days

EPSS score — moderate exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 7.5/10 High

NETWORK / LOW complexity

Affected Products (12)

Enterprise Linux Desktop

Enterprise Linux Server

Enterprise Linux Workstation

Debian Linux

Firefox

Thunderbird

Affected Vendors

Debian Redhat Mozilla

References (18)

Third Party Advisory http://rhn.redhat.com/errata/RHSA-2016-2946.html

Third Party Advisory http://www.securityfocus.com/bid/94885

Third Party Advisory http://www.securitytracker.com/id/1037461

Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1317936

Third Party Advisory https://security.gentoo.org/glsa/201701-15

Third Party Advisory https://www.debian.org/security/2017/dsa-3757

Vendor 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/