Описание
An issue was discovered in HAProxy before 1.8.8. The incoming H2 frame length was checked against the max_frame_size setting instead of being checked against the bufsize. The max_frame_size only applies to outgoing traffic and not to incoming, so if a large enough frame size is advertised in the SETTINGS frame, a wrapped frame will be defragmented into a temporary allocated buffer where the second fragment may overflow the heap by up to 16 kB. It is very unlikely that this can be exploited for code execution given that buffers are very short lived and their addresses not realistically predictable in production, but the likelihood of an immediate crash is absolutely certain.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 6 | haproxy | Not affected | ||
| Red Hat Enterprise Linux 7 | haproxy | Not affected | ||
| Red Hat Enterprise Linux 8 | haproxy | Not affected | ||
| Red Hat OpenShift Container Platform 3.9 | haproxy | Fixed | RHBA-2018:1566 | 17.05.2018 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 | rh-haproxy18-haproxy | Fixed | RHSA-2018:1372 | 14.05.2018 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUS | rh-haproxy18-haproxy | Fixed | RHSA-2018:1372 | 14.05.2018 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS | rh-haproxy18-haproxy | Fixed | RHSA-2018:1372 | 14.05.2018 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS | rh-haproxy18-haproxy | Fixed | RHSA-2018:1372 | 14.05.2018 |
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Дополнительная информация
Статус:
EPSS
8.6 High
CVSS3
Связанные уязвимости
An issue was discovered in HAProxy before 1.8.8. The incoming H2 frame length was checked against the max_frame_size setting instead of being checked against the bufsize. The max_frame_size only applies to outgoing traffic and not to incoming, so if a large enough frame size is advertised in the SETTINGS frame, a wrapped frame will be defragmented into a temporary allocated buffer where the second fragment may overflow the heap by up to 16 kB. It is very unlikely that this can be exploited for code execution given that buffers are very short lived and their addresses not realistically predictable in production, but the likelihood of an immediate crash is absolutely certain.
An issue was discovered in HAProxy before 1.8.8. The incoming H2 frame length was checked against the max_frame_size setting instead of being checked against the bufsize. The max_frame_size only applies to outgoing traffic and not to incoming, so if a large enough frame size is advertised in the SETTINGS frame, a wrapped frame will be defragmented into a temporary allocated buffer where the second fragment may overflow the heap by up to 16 kB. It is very unlikely that this can be exploited for code execution given that buffers are very short lived and their addresses not realistically predictable in production, but the likelihood of an immediate crash is absolutely certain.
An issue was discovered in HAProxy before 1.8.8. The incoming H2 frame ...
An issue was discovered in HAProxy before 1.8.8. The incoming H2 frame length was checked against the max_frame_size setting instead of being checked against the bufsize. The max_frame_size only applies to outgoing traffic and not to incoming, so if a large enough frame size is advertised in the SETTINGS frame, a wrapped frame will be defragmented into a temporary allocated buffer where the second fragment may overflow the heap by up to 16 kB. It is very unlikely that this can be exploited for code execution given that buffers are very short lived and their addresses not realistically predictable in production, but the likelihood of an immediate crash is absolutely certain.
EPSS
8.6 High
CVSS3