Описание
Attacker can upload a malicious Sieve script over ManageSieve service (or locally) to bypass configured CPU time limits for Sieve up to 130 times of the configured limit. Attacker can use this to degrade server performance and bypass configured CPU time limits for Sieve scripts. Install fixed version, or alternatively prevent direct access to Sieve scripts via ManageSieve or local access. No publicly available exploits are known.
A flaw was found in Dovecot. A remote or local attacker could upload a malicious Sieve script through the ManageSieve service, or locally, to bypass configured CPU time limits for Sieve scripts. This allows the attacker to consume excessive server resources, leading to a degradation of server performance and a Denial of Service (DoS).
Меры по смягчению последствий
To mitigate this issue, restrict access to the ManageSieve service to trusted users or networks. If the ManageSieve service is not essential, consider disabling it. Additionally, ensure that local user access to Sieve script directories is appropriately controlled. Any changes to Dovecot configuration may require a service reload or restart, potentially causing a brief interruption to mail services.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Red Hat Enterprise Linux 10 | dovecot | Fix deferred | ||
| Red Hat Enterprise Linux 6 | dovecot | Fix deferred | ||
| Red Hat Enterprise Linux 8 | dovecot | Fix deferred | ||
| Red Hat Enterprise Linux 9 | dovecot | Out of support scope |
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Дополнительная информация
Статус:
EPSS
6.5 Medium
CVSS3
Связанные уязвимости
Attacker can upload a malicious Sieve script over ManageSieve service (or locally) to bypass configured CPU time limits for Sieve up to 130 times of the configured limit. Attacker can use this to degrade server performance and bypass configured CPU time limits for Sieve scripts. Install fixed version, or alternatively prevent direct access to Sieve scripts via ManageSieve or local access. No publicly available exploits are known.
Attacker can upload a malicious Sieve script over ManageSieve service (or locally) to bypass configured CPU time limits for Sieve up to 130 times of the configured limit. Attacker can use this to degrade server performance and bypass configured CPU time limits for Sieve scripts. Install fixed version, or alternatively prevent direct access to Sieve scripts via ManageSieve or local access. No publicly available exploits are known.
Attacker can upload a malicious Sieve script over ManageSieve service ...
Attacker can upload a malicious Sieve script over ManageSieve service (or locally) to bypass configured CPU time limits for Sieve up to 130 times of the configured limit. Attacker can use this to degrade server performance and bypass configured CPU time limits for Sieve scripts. Install fixed version, or alternatively prevent direct access to Sieve scripts via ManageSieve or local access. No publicly available exploits are known.
Уязвимость службы ManageSieve почтовых серверов Dovecot и OX Dovecot Pro, связанная с неконтролируемым расходом ресурсов, позволяющая нарушителю вызвать отказ в обслуживании
EPSS
6.5 Medium
CVSS3