CVE-2019-11757
firefox-esr - security update
8.8
HIGH
CVSS 3.1
EPSS 0.89%
Description
When following the value's prototype chain, it was possible to retain a reference to a locale, delete it, and subsequently reference it. This resulted in a use-after-free and a potentially exploitable crash. This vulnerability affects Firefox < 70, Thunderbird < 68.2, and Firefox ESR < 68.2.
How to fix CVE-2019-11757
To remediate CVE-2019-11757, upgrade the affected package to a fixed version below.
- —upgrade to 68.2.0esr-1 or later
- —upgrade to 68.2.0esr-1~deb8u1 or later
- —upgrade to 68.2.0esr-1~deb10u1 or later
- —upgrade to 1:68.2.1-1 or later
Is CVE-2019-11757 being exploited?
Low — EPSS is 0.9%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- from 0, < 68.2.0esr-1
- from 0, < 68.2.0esr-1~deb8u1
- from 0, < 68.2.0esr-1~deb10u1
- from 0, < 1:68.2.1-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |