CVE-2016-9904
7.5
HIGH
CVSS 3.1
EPSS 2.8%
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.
How to fix CVE-2016-9904
To remediate CVE-2016-9904, upgrade the affected package to a fixed version below.
- Debian/firefox-esr—upgrade to 45.6.0esr-1 or later
Is CVE-2016-9904 being exploited?
Low — EPSS is 2.8%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 45.6.0esr-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |