CVE-2020-6821
firefox-esr - security update
7.5
HIGH
CVSS 3.1
EPSS 0.54%
Description
When reading from areas partially or fully outside the source resource with WebGL's <code>copyTexSubImage</code> method, the specification requires the returned values be zero. Previously, this memory was uninitialized, leading to potentially sensitive data disclosure. This vulnerability affects Thunderbird < 68.7.0, Firefox ESR < 68.7, and Firefox < 75.
How to fix CVE-2020-6821
To remediate CVE-2020-6821, upgrade the affected package to a fixed version below.
- —upgrade to 68.7.0esr-1 or later
- —upgrade to 68.7.0esr-1~deb9u1 or later
- —upgrade to 1:68.7.0-1 or later
Is CVE-2020-6821 being exploited?
Low — EPSS is 0.5%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 68.7.0esr-1
- from 0, < 68.7.0esr-1~deb9u1
- from 0, < 1:68.7.0-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |