Описание
cert-manager adds certificates and certificate issuers as resource types in Kubernetes clusters, and simplifies the process of obtaining, renewing and using those certificates. In versions from 1.18.0 to before 1.18.5 and from 1.19.0 to before 1.19.3, the cert-manager-controller performs DNS lookups during ACME DNS-01 processing (for zone discovery and propagation self-checks). By default, these lookups use standard unencrypted DNS. An attacker who can intercept and modify DNS traffic from the cert-manager-controller pod can insert a crafted entry into cert-manager's DNS cache. Accessing this entry will trigger a panic, resulting in denial‑of‑service (DoS) of the cert-manager controller. The issue can also be exploited if the authoritative DNS server for the domain being validated is controlled by a malicious actor. This issue has been patched in versions 1.18.5 and 1.19.3.
A flaw was found in cert-manager for Kubernetes clusters. The cert-manager-controller performs DNS lookups during ACME DNS-01 processing (for zone discovery and propagation self-checks). By default, these lookups use standard unencrypted DNS. An attacker who can intercept and modify DNS traffic from the cert-manager-controller pod can insert a crafted entry into cert-manager's DNS cache. Accessing this entry will trigger a panic, resulting in denial‑of‑service (DoS) of the cert-manager controller. The issue can also be exploited if the authoritative DNS server for the domain being validated is controlled by a malicious actor.
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 |
|---|---|---|---|---|
| cert-manager Operator for Red Hat OpenShift | cert-manager/cert-manager-istio-csr-rhel9 | Fix deferred | ||
| cert-manager Operator for Red Hat OpenShift | cert-manager/cert-manager-operator-bundle | Fix deferred | ||
| cert-manager Operator for Red Hat OpenShift | cert-manager/cert-manager-operator-rhel9 | Fix deferred | ||
| cert-manager Operator for Red Hat OpenShift | cert-manager/jetstack-cert-manager-acmesolver-rhel9 | Fix deferred | ||
| cert-manager Operator for Red Hat OpenShift | cert-manager/jetstack-cert-manager-rhel9 | Fix deferred | ||
| Cryostat 4 | cryostat/cryostat-rhel9-operator | Fix deferred | ||
| External Secrets Operator for Red Hat OpenShift | external-secrets-operator/bitwarden-sdk-server-rhel9 | Fix deferred | ||
| External Secrets Operator for Red Hat OpenShift | external-secrets-operator/external-secrets-operator-bundle | Fix deferred | ||
| External Secrets Operator for Red Hat OpenShift | external-secrets-operator/external-secrets-operator-rhel9 | Fix deferred | ||
| External Secrets Operator for Red Hat OpenShift | external-secrets-operator/external-secrets-rhel9 | Fix deferred |
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Дополнительная информация
Статус:
5.9 Medium
CVSS3
Связанные уязвимости
cert-manager adds certificates and certificate issuers as resource types in Kubernetes clusters, and simplifies the process of obtaining, renewing and using those certificates. In versions from 1.18.0 to before 1.18.5 and from 1.19.0 to before 1.19.3, the cert-manager-controller performs DNS lookups during ACME DNS-01 processing (for zone discovery and propagation self-checks). By default, these lookups use standard unencrypted DNS. An attacker who can intercept and modify DNS traffic from the cert-manager-controller pod can insert a crafted entry into cert-manager's DNS cache. Accessing this entry will trigger a panic, resulting in denial‑of‑service (DoS) of the cert-manager controller. The issue can also be exploited if the authoritative DNS server for the domain being validated is controlled by a malicious actor. This issue has been patched in versions 1.18.5 and 1.19.3.
cert-manager-controller DoS via Specially Crafted DNS Response
5.9 Medium
CVSS3