Описание
An unbounded resend loop vulnerability exists in the BIND 9 resolver state machine during bad-server handling, enabling a remote unauthenticated attacker to cause severe resource exhaustion by sending queries that trigger specific retry conditions.
This issue affects BIND 9 versions 9.18.36 through 9.18.48, 9.20.8 through 9.20.22, 9.21.7 through 9.21.21, 9.18.36-S1 through 9.18.48-S1, and 9.20.9-S1 through 9.20.22-S1.
A flaw was found in BIND 9. A remote, unauthenticated attacker can exploit an unbounded resend loop vulnerability in the resolver state machine during bad-server handling. By sending specially crafted queries that trigger specific retry conditions, the attacker can cause severe resource exhaustion, leading to a Denial of Service (DoS).
Отчет
Moderate: This flaw in the BIND 9 resolver's state machine can lead to severe resource exhaustion. A remote, unauthenticated attacker could exploit this by sending specially crafted queries that trigger an unbounded resend loop during bad-server handling, potentially causing a denial of service in affected Red Hat products utilizing BIND as a resolver.
Меры по смягчению последствий
Mitigation for this issue is either not available or the currently available options do not 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 10 | bind | Affected | ||
| Red Hat Enterprise Linux 6 | bind | Fix deferred | ||
| Red Hat Enterprise Linux 7 | bind | Fix deferred | ||
| Red Hat Enterprise Linux 8 | bind | Fix deferred | ||
| Red Hat Enterprise Linux 8 | bind9.16 | Fix deferred | ||
| Red Hat Enterprise Linux 9 | bind | Fix deferred | ||
| Red Hat Enterprise Linux 9 | bind9.18 | Fix deferred | ||
| Red Hat Enterprise Linux 9 | dhcp | Fix deferred | ||
| Red Hat OpenShift Container Platform 4 | rhcos | Fix deferred | ||
| Red Hat Hardened Images | bind-main-9.18.49-1.hum1 | Fixed | RHSA-2026:20334 | 21.05.2026 |
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Дополнительная информация
Статус:
EPSS
5.3 Medium
CVSS3
Связанные уязвимости
An unbounded resend loop vulnerability exists in the BIND 9 resolver state machine during bad-server handling, enabling a remote unauthenticated attacker to cause severe resource exhaustion by sending queries that trigger specific retry conditions. This issue affects BIND 9 versions 9.18.36 through 9.18.48, 9.20.8 through 9.20.22, 9.21.7 through 9.21.21, 9.18.36-S1 through 9.18.48-S1, and 9.20.9-S1 through 9.20.22-S1.
An unbounded resend loop vulnerability exists in the BIND 9 resolver state machine during bad-server handling, enabling a remote unauthenticated attacker to cause severe resource exhaustion by sending queries that trigger specific retry conditions. This issue affects BIND 9 versions 9.18.36 through 9.18.48, 9.20.8 through 9.20.22, 9.21.7 through 9.21.21, 9.18.36-S1 through 9.18.48-S1, and 9.20.9-S1 through 9.20.22-S1.
An unbounded resend loop vulnerability exists in the BIND 9 resolver s ...
An unbounded resend loop vulnerability exists in the BIND 9 resolver state machine during bad-server handling, enabling a remote unauthenticated attacker to cause severe resource exhaustion by sending queries that trigger specific retry conditions. This issue affects BIND 9 versions 9.18.36 through 9.18.48, 9.20.8 through 9.20.22, 9.21.7 through 9.21.21, 9.18.36-S1 through 9.18.48-S1, and 9.20.9-S1 through 9.20.22-S1.
EPSS
5.3 Medium
CVSS3