Impact: Important Public Date: 2019-08-13 CWE: CWE-400 Bugzilla: 1741860: CVE-2019-9511 HTTP/2: large amount of data request leads to denial of service 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.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2019-9511 from the MITRE CVE dictionary dictionary and NIST NVD.
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
| CVSS3 Base Score | 6.5 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | Low |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity Impact | None |
| Availability Impact | High |
| Platform | Package | State |
|---|---|---|
| Red Hat JBoss Web Server 3.0 | httpd | Under investigation |
| Red Hat Enterprise Linux 8 | httpd | Under investigation |
| Red Hat Enterprise Linux 7 | httpd | Under investigation |
| Red Hat Enterprise Linux 6 | httpd | Under investigation |
| Red Hat Enterprise Linux 5 | httpd | Under investigation |
Vulmon