Описание
An attacker that has valid credentials can open many connections to the imap-hibernate service and send invalid commands, which can intermittently cause an out-of-bounds read and crash the process. The crash interrupts hibernated IMAP sessions handled by the affected process, which can cause degradation of service for IMAP. Disable IMAP hibernation. Update to non-vulnerable version. No publicly available exploits are known.
A flaw was found in Dovecot's imap-hibernate service. An authenticated attacker can open numerous connections and send malformed commands, leading to an out-of-bounds read. This can intermittently crash the process, interrupting hibernated IMAP sessions and causing a denial of service for affected users.
Меры по смягчению последствий
To mitigate this issue, disable IMAP hibernation in Dovecot. This can be achieved by setting imap_hibernate_timeout = 0 in the Dovecot configuration. For example, add or modify the following line in /etc/dovecot/local.conf or a relevant configuration file within /etc/dovecot/conf.d/:
After modifying the configuration, restart the Dovecot service for the changes to take effect:
Disabling IMAP hibernation may affect the performance or behavior of IMAP sessions that rely on this feature.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 10 | dovecot | Fix deferred | ||
| Red Hat Enterprise Linux 6 | dovecot | Out of support scope | ||
| Red Hat Enterprise Linux 7 | dovecot | Fix deferred | ||
| Red Hat Enterprise Linux 8 | dovecot | Fix deferred | ||
| Red Hat Enterprise Linux 9 | dovecot | Fix deferred |
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Дополнительная информация
Статус:
4.3 Medium
CVSS3
Связанные уязвимости
An attacker that has valid credentials can open many connections to the imap-hibernate service and send invalid commands, which can intermittently cause an out-of-bounds read and crash the process. The crash interrupts hibernated IMAP sessions handled by the affected process, which can cause degradation of service for IMAP. Disable IMAP hibernation. Update to non-vulnerable version. No publicly available exploits are known.
An attacker that has valid credentials can open many connections to the imap-hibernate service and send invalid commands, which can intermittently cause an out-of-bounds read and crash the process. The crash interrupts hibernated IMAP sessions handled by the affected process, which can cause degradation of service for IMAP. Disable IMAP hibernation. Update to non-vulnerable version. No publicly available exploits are known.
An attacker that has valid credentials can open many connections to th ...
An attacker that has valid credentials can open many connections to the imap-hibernate service and send invalid commands, which can intermittently cause an out-of-bounds read and crash the process. The crash interrupts hibernated IMAP sessions handled by the affected process, which can cause degradation of service for IMAP. Disable IMAP hibernation. Update to non-vulnerable version. No publicly available exploits are known.
4.3 Medium
CVSS3