CVE-2017-7756
9.8
CRITICAL
CVSS 3.1
EPSS 1.9%
Description
A use-after-free and use-after-scope vulnerability when logging errors from headers for XML HTTP Requests (XHR). This could result in a potentially exploitable crash. This vulnerability affects Firefox < 54, Firefox ESR < 52.2, and Thunderbird < 52.2.
How to fix CVE-2017-7756
To remediate CVE-2017-7756, upgrade the affected package to a fixed version below.
- Debian/firefox-esr—upgrade to 52.2.0esr-1 or later
Is CVE-2017-7756 being exploited?
Low — EPSS is 1.9%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 52.2.0esr-1
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 |