Описание
CoreDNS is a DNS server that chains plugins. Starting in version 1.2.0 and prior to version 1.12.4, the CoreDNS etcd plugin contains a TTL confusion vulnerability where lease IDs are incorrectly used as TTL values, enabling DNS cache pinning attacks. This effectively creates a DoS condition for DNS resolution of affected services. The TTL() function in plugin/etcd/etcd.go incorrectly casts etcd lease IDs (64-bit integers) to uint32 and uses them as TTL values. Large lease IDs become very large TTLs when cast to uint32. This enables cache pinning attacks. Version 1.12.4 contains a fix for the issue.
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 Advanced Cluster Management for Kubernetes 2 | rhacm2/lighthouse-agent-rhel9 | Fix deferred | ||
| Red Hat Advanced Cluster Management for Kubernetes 2 | rhacm2/lighthouse-coredns-rhel8 | Fix deferred | ||
| Red Hat Advanced Cluster Management for Kubernetes 2 | rhacm2/lighthouse-coredns-rhel9 | Fix deferred | ||
| Red Hat OpenShift Container Platform 4 | openshift4/ose-coredns-rhel9 | Not affected |
Показывать по
Дополнительная информация
Статус:
EPSS
5.4 Medium
CVSS3
Связанные уязвимости
CoreDNS is a DNS server that chains plugins. Starting in version 1.2.0 and prior to version 1.12.4, the CoreDNS etcd plugin contains a TTL confusion vulnerability where lease IDs are incorrectly used as TTL values, enabling DNS cache pinning attacks. This effectively creates a DoS condition for DNS resolution of affected services. The `TTL()` function in `plugin/etcd/etcd.go` incorrectly casts etcd lease IDs (64-bit integers) to uint32 and uses them as TTL values. Large lease IDs become very large TTLs when cast to uint32. This enables cache pinning attacks. Version 1.12.4 contains a fix for the issue.
CoreDNS is a DNS server that chains plugins. Starting in version 1.2.0 ...
CoreDNS: DNS Cache Pinning via etcd Lease ID Confusion
EPSS
5.4 Medium
CVSS3