Описание
When a HTTP/2 stream was reset (RST frame) by a client, there was a time window were the request's memory resources were not reclaimed immediately. Instead, de-allocation was deferred to connection close. A client could send new requests and resets, keeping the connection busy and open and causing the memory footprint to keep on growing. On connection close, all resources were reclaimed, but the process might run out of memory before that.
This was found by the reporter during testing of CVE-2023-44487 (HTTP/2 Rapid Reset Exploit) with their own test client. During "normal" HTTP/2 use, the probability to hit this bug is very low. The kept memory would not become noticeable before the connection closes or times out.
Users are recommended to upgrade to version 2.4.58, which fixes the issue.
A flaw was found in mod_http2. When a HTTP/2 stream is reset (RST frame) by a client, there is a time window were the request's memory resources were not reclaimed immediately. Instead, de-allocation was deferred to connection close. A client could send new requests and resets, keeping the connection busy and open, causing the memory footprint to keep on growing. On connection close, all resources are reclaimed but the process might run out of memory before connection close.
Отчет
During "normal" HTTP/2 use, the probability of encountering this issue is very low. The kept memory would not become noticeable before the connection closes or times out.
Меры по смягчению последствий
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 6 | httpd | Out of support scope | ||
| Red Hat Enterprise Linux 7 | httpd | Not affected | ||
| Red Hat Enterprise Linux 9 | httpd | Not affected | ||
| Red Hat JBoss Enterprise Application Platform 6 | httpd22 | Out of support scope | ||
| Red Hat Software Collections | httpd24 | Will not fix | ||
| JBoss Core Services for RHEL 8 | jbcs-httpd24-mod_http2 | Fixed | RHSA-2023:7625 | 07.12.2023 |
| JBoss Core Services on RHEL 7 | jbcs-httpd24-mod_http2 | Fixed | RHSA-2023:7625 | 07.12.2023 |
| Red Hat Enterprise Linux 8 | httpd | Fixed | RHSA-2024:3121 | 22.05.2024 |
| Red Hat Enterprise Linux 8.8 Extended Update Support | httpd | Fixed | RHSA-2024:2891 | 16.05.2024 |
| Red Hat Enterprise Linux 9 | mod_http2 | Fixed | RHSA-2024:2368 | 30.04.2024 |
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Дополнительная информация
Статус:
EPSS
7.5 High
CVSS3
Связанные уязвимости
When a HTTP/2 stream was reset (RST frame) by a client, there was a time window were the request's memory resources were not reclaimed immediately. Instead, de-allocation was deferred to connection close. A client could send new requests and resets, keeping the connection busy and open and causing the memory footprint to keep on growing. On connection close, all resources were reclaimed, but the process might run out of memory before that. This was found by the reporter during testing of CVE-2023-44487 (HTTP/2 Rapid Reset Exploit) with their own test client. During "normal" HTTP/2 use, the probability to hit this bug is very low. The kept memory would not become noticeable before the connection closes or times out. Users are recommended to upgrade to version 2.4.58, which fixes the issue.
When a HTTP/2 stream was reset (RST frame) by a client, there was a time window were the request's memory resources were not reclaimed immediately. Instead, de-allocation was deferred to connection close. A client could send new requests and resets, keeping the connection busy and open and causing the memory footprint to keep on growing. On connection close, all resources were reclaimed, but the process might run out of memory before that. This was found by the reporter during testing of CVE-2023-44487 (HTTP/2 Rapid Reset Exploit) with their own test client. During "normal" HTTP/2 use, the probability to hit this bug is very low. The kept memory would not become noticeable before the connection closes or times out. Users are recommended to upgrade to version 2.4.58, which fixes the issue.
When a HTTP/2 stream was reset (RST frame) by a client, there was a ti ...
EPSS
7.5 High
CVSS3