CVE-2019-9511
Public on 2019-08-13
Modified on 2019-10-30
Description
A flaw was found in HTTP/2. An attacker can request a large amount of data by manipulating 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 queue can consume excess CPU, memory, or both, leading to a denial of service. The highest threat from this vulnerability is to system availability.
Severity
Important
CVSS v3 Base Score
See breakdown
Affected Packages
| Platform | Package | Release Date | Advisory | Status |
|---|---|---|---|---|
| Amazon Linux 2 - Core | mod_http2 | 2019-10-28 | ALAS2-2019-1342 | Fixed |
| Amazon Linux 1 | nghttp2 | 2019-09-30 | ALAS-2019-1298 | Fixed |
| Amazon Linux 2 - Core | nghttp2 | 2019-10-08 | ALAS2-2019-1298 | Fixed |
| Amazon Linux 1 | nginx | 2019-09-30 | ALAS-2019-1299 | Fixed |
CVSS Scores
| Score Type | Score | Vector | |
|---|---|---|---|
| Amazon Linux | CVSSv3 | 6.5 | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVD | CVSSv3 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | CVSSv2 | 7.8 | AV:N/AC:L/Au:N/C:N/I:N/A:C |