CVE-2018-5099
9.8
CRITICAL
CVSS 3.1
EPSS 3.9%
Description
A use-after-free vulnerability can occur when the widget listener is holding strong references to browser objects that have previously been freed, resulting in a potentially exploitable crash when these references are used. This vulnerability affects Thunderbird < 52.6, Firefox ESR < 52.6, and Firefox < 58.
How to fix CVE-2018-5099
To remediate CVE-2018-5099, upgrade the affected package to a fixed version below.
- Debian/firefox-esr—upgrade to 52.6.0esr-1 or later
- —upgrade to 1:52.6.0-1 or later
Is CVE-2018-5099 being exploited?
Low — EPSS is 3.9%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 52.6.0esr-1
- from 0, < 1:52.6.0-1
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 |