CVE-2021-23968
thunderbird - security update
4.3
MEDIUM
CVSS 3.1
EPSS 0.43%
Description
If Content Security Policy blocked frame navigation, the full destination of a redirect served in the frame was reported in the violation report; as opposed to the original frame URI. This could be used to leak sensitive information contained in such URIs. This vulnerability affects Firefox < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.
How to fix CVE-2021-23968
To remediate CVE-2021-23968, upgrade the affected package to a fixed version below.
- —upgrade to 78.8.0esr-1 or later
- —upgrade to 78.8.0esr-1~deb9u1 or later
- —upgrade to 78.8.0esr-1~deb10u1 or later
- —upgrade to 1:78.8.0-1 or later
- —upgrade to 1:78.8.0-1~deb9u1 or later
- —upgrade to 1:78.8.0-1~deb10u1 or later
Is CVE-2021-23968 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (6)
- from 0, < 78.8.0esr-1
- from 0, < 78.8.0esr-1~deb9u1
- from 0, < 78.8.0esr-1~deb10u1
- from 0, < 1:78.8.0-1
- from 0, < 1:78.8.0-1~deb9u1
- from 0, < 1:78.8.0-1~deb10u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N |