Описание
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.
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.
Отчет
There are no mitigations available for nghttp2 and nodejs. Both packages will be updated once the available fixes are released for Red Hat Enterprise Linux and Red Hat Software Collections. The nodejs RPM shipped in OpenShift Container Platform 3.9 and 3.10 is not affected by this flaw as it does not contain the vulnerable code.
Меры по смягчению последствий
Red Hat Quay 3.0 uses Nginx 1.12 from Red Hat Software Collections. It will be updated once a fixed is released for Software Collections. In the meantime users of Quay can disable http/2 support in Nginx by following these instructions:
- Copy the Nginx configuration from the quay container to the host $ docker cp 3aadf1421ba3:/quay-registry/conf/nginx/ /mnt/quay/nginx
- Edit the Nginx configuration, removing http/2 support $ sed -i 's/http2 //g' /mnt/quay/nginx/nginx.conf
- Restart Nginx with the new configuration mounted into the container, eg: $ docker run --restart=always -p 443:8443 -p 80:8080 --sysctl net.core.somaxconn=4096 -v /mnt/quay/config:/conf/stack:Z -v /mnt/quay/storage:/datastorage -v /mnt/quay/nginx:/quay-registry/config/nginx:Z -d quay.io/redhat/quay:v3.0.3
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| CloudForms Management Engine 5 | nginx | Not affected | ||
| Red Hat 3scale API Management Platform 2 | nginx | Affected | ||
| Red Hat Ansible Tower 3 | nginx | Not affected | ||
| Red Hat Enterprise Linux 8 | httpd:2.4/mod_http2 | Not affected | ||
| Red Hat Enterprise Linux 8 | nginx:1.16/nginx | Not affected | ||
| Red Hat JBoss Data Grid 7 | undertow | Not affected | ||
| Red Hat JBoss Enterprise Application Platform 6 | jbossweb | Not affected | ||
| Red Hat JBoss Enterprise Application Platform Continuous Delivery | undertow | Affected | ||
| Red Hat JBoss Enterprise Web Server 3 | httpd | Out of support scope | ||
| Red Hat JBoss Fuse 6 | undertow | Not affected |
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Дополнительная информация
Статус:
EPSS
6.5 Medium
CVSS3
Связанные уязвимости
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.
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.
Some HTTP/2 implementations are vulnerable to window size manipulation ...
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.
EPSS
6.5 Medium
CVSS3