CVE-2019-9511
nghttp2 - security update
7.5
HIGH
CVSS 3.1
EPSS 58.4%
Description
Some HTTP/2 implementations are vulnerable to window size manipulation and stream prioritization manipulation, potentially leading to a denial of service. The attacker requests a large amount of data from a specified resource over multiple streams. They manipulate window size and stream priority to force the server to queue the data in 1-byte chunks. Depending on how efficiently this data is queued, this can consume excess CPU, memory, or both.
How to fix CVE-2019-9511
To remediate CVE-2019-9511, upgrade the affected package to a fixed version below.
- —upgrade to 1.39.2-r0 or later
- —upgrade to 1.16.1-r0 or later
- —upgrade to 10.16.3-r0 or later
Is CVE-2019-9511 being exploited?
Likely — EPSS is 58.4%, placing CVE-2019-9511 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.
Affected packages (3)
- from 0, < 1.39.2-r0
- >= 1.9.5, < 1.16.1-r0
- from 0, < 10.16.3-r0
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:N/I:N/A:H |