CVE-2021-29970
firefox-esr - security update
8.8
HIGH
CVSS 3.1
EPSS 0.80%
Description
A malicious webpage could have triggered a use-after-free, memory corruption, and a potentially exploitable crash. *This bug could only be triggered when accessibility was enabled.*. This vulnerability affects Thunderbird < 78.12, Firefox ESR < 78.12, and Firefox < 90.
How to fix CVE-2021-29970
To remediate CVE-2021-29970, upgrade the affected package to a fixed version below.
- —upgrade to 78.12.0esr-1 or later
- —upgrade to 78.12.0esr-1~deb9u1 or later
- —upgrade to 78.12.0esr-1~deb10u1 or later
- —upgrade to 1:78.12.0-1 or later
Is CVE-2021-29970 being exploited?
Low — EPSS is 0.8%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- from 0, < 78.12.0esr-1
- from 0, < 78.12.0esr-1~deb9u1
- from 0, < 78.12.0esr-1~deb10u1
- from 0, < 1:78.12.0-1
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 |