CVE-2016-8740
7.5
HIGH
CVSS 3.1
EPSS 67.7%
Description
The mod_http2 module in the Apache HTTP Server 2.4.17 through 2.4.23, when the Protocols configuration includes h2 or h2c, does not restrict request-header length, which allows remote attackers to cause a denial of service (memory consumption) via crafted CONTINUATION frames in an HTTP/2 request.
How to fix CVE-2016-8740
To remediate CVE-2016-8740, upgrade the affected package to a fixed version below.
- Debian/apache2—upgrade to 2.4.25-1 or later
Is CVE-2016-8740 being exploited?
Likely — EPSS is 67.7%, placing CVE-2016-8740 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.
Affected packages (1)
- from 0, < 2.4.25-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |