CVE-2019-9518

HIGH

Description

Some HTTP/2 implementations are vulnerable to a flood of empty frames, potentially leading to a denial of service. The attacker sends a stream of frames with an empty payload and without the end-of-stream flag. These frames can be DATA, HEADERS, CONTINUATION and/or PUSH_PROMISE. The peer spends time processing each frame disproportionate to attack bandwidth. This can consume excess CPU.

References

http://seclists.org/fulldisclosure/2019/Aug/16

https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.md

https://kb.cert.org/vuls/id/605641/

https://lists.apache.org/thread.html/[email protected]%3Cusers.trafficserver.apache.org%3E

https://lists.apache.org/thread.html/[email protected]%3Cannounce.trafficserver.apache.org%3E

https://lists.apache.org/thread.html/[email protected]%3Cdev.trafficserver.apache.org%3E

https://lists.fedoraproject.org/archives/list/[email protected].org/message/4ZQGHE3WTYLYAYJEIDJVF2FIGQTAYPMC/

https://lists.fedoraproject.org/archives/list/[email protected]/message/CMNFX5MNYRWWIMO4BTKYQCGUDMHO3AXP/

https://seclists.org/bugtraq/2019/Aug/24

https://security.netapp.com/advisory/ntap-20190823-0005/

https://support.f5.com/csp/article/K46011592

https://www.synology.com/security/advisory/Synology_SA_19_33

Details

Source: MITRE

Published: 2019-08-13

Updated: 2019-08-23

Type: CWE-400

Risk Information

CVSS v2.0

Base Score: 7.8

Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C

Impact Score: 6.9

Exploitability Score: 10

Severity: HIGH

CVSS v3.0

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Impact Score: 3.6

Exploitability Score: 3.9

Severity: HIGH