CVE-2017-5402
9.8
CRITICAL
CVSS 3.1
EPSS 2.6%
Description
A use-after-free can occur when events are fired for a "FontFace" object after the object has been already been destroyed while working with fonts. This results in a potentially exploitable crash. This vulnerability affects Firefox < 52, Firefox ESR < 45.8, Thunderbird < 52, and Thunderbird < 45.8.
How to fix CVE-2017-5402
To remediate CVE-2017-5402, upgrade the affected package to a fixed version below.
- Debian/firefox-esr—upgrade to 45.8.0esr-1 or later
Is CVE-2017-5402 being exploited?
Low — EPSS is 2.6%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 45.8.0esr-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |