CVE-2019-9511

HIGH

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.

References

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

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

https://lists.fedoraproject.org/archives/list/[email protected]/message/BP556LEG3WENHZI5TAQ6ZEBFTJB4E2IS/

https://lists.fedoraproject.org/archives/list/[email protected]/message/JUBYAF6ED3O4XCHQ5C2HYENJLXYXZC4M/

https://lists.fedoraproject.org/archives/list/[email protected]/message/LZLUYPYY3RX4ZJDWZRJIKSULYRJ4PXW7/

https://lists.fedoraproject.org/archives/list/[email protected]/message/POPAEC4FWL4UU4LDEGPY5NPALU24FFQD/

https://lists.fedoraproject.org/archives/list/[email protected]/message/TAZZEVTCN2B4WT6AIBJ7XGYJMBTORJU5/

https://lists.fedoraproject.org/archives/list/[email protected]/message/XHTKU7YQ5EEP2XNSAV4M4VJ7QCBOJMOD/

https://seclists.org/bugtraq/2019/Aug/40

https://seclists.org/bugtraq/2019/Sep/1

https://security.netapp.com/advisory/ntap-20190823-0002/

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

https://support.f5.com/csp/article/K02591030

https://usn.ubuntu.com/4099-1/

https://www.debian.org/security/2019/dsa-4505

https://www.debian.org/security/2019/dsa-4511

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