CVE-2017-7793
thunderbird - security update
9.8
CRITICAL
CVSS 3.1
EPSS 2.4%
Description
A use-after-free vulnerability can occur in the Fetch API when the worker or the associated window are freed when still in use, resulting in a potentially exploitable crash. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.
How to fix CVE-2017-7793
To remediate CVE-2017-7793, upgrade the affected package to a fixed version below.
- Debian/firefox-esr—upgrade to 52.4.0esr-2 or later
- —upgrade to 52.4.0esr-2~deb7u1 or later
- —upgrade to 52.4.0esr-1~deb8u1 or later
- —upgrade to 1:52.4.0-1 or later
- —upgrade to 1:52.4.0-1~deb7u1 or later
- —upgrade to 1:52.4.0-1~deb8u1 or later
Is CVE-2017-7793 being exploited?
Low — EPSS is 2.4%, meaning exploitation activity has not been observed at scale.
Affected packages (6)
- from 0, < 52.4.0esr-2
- from 0, < 52.4.0esr-2~deb7u1
- from 0, < 52.4.0esr-1~deb8u1
- from 0, < 1:52.4.0-1
- from 0, < 1:52.4.0-1~deb7u1
- from 0, < 1:52.4.0-1~deb8u1
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 |