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CVE-2019-9511

Published: August 31, 2023Last modified: August 31, 2023

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.

Severity score breakdown

ParameterValue
Base score7.5
Attack VectorNETWORK
Attack complexityLOW
Privileges requiredNONE
User interactionNONE
ScopeUNCHANGED
ConfidentialityNONE
Integrity impactNONE
Availability impactHIGH
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Status

ProductReleasePackageStatus
Alpaquita Linux23 LTSnghttp2Not affected (1.51.0-r1)
nginxNot affected (1.22.1-r0)
nodejsNot affected (18.17.1-r0)
Streamnghttp2Not affected (1.55.1-r0)
nginxNot affected (1.24.0-r11)
nodejsNot affected (18.17.1-r0)

References

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