Описание
CoreDNS is a DNS server that chains plugins. Prior to version 1.14.2, a denial of service vulnerability exists in CoreDNS's loop detection plugin that allows an attacker to crash the DNS server by sending specially crafted DNS queries. The vulnerability stems from the use of a predictable pseudo-random number generator (PRNG) for generating a secret query name, combined with a fatal error handler that terminates the entire process. This issue has been patched in version 1.14.2.
A flaw was found in CoreDNS, a DNS server that chains plugins. A remote attacker can exploit this flaw by sending specially crafted DNS queries. This vulnerability exists in CoreDNS's loop detection plugin due to the use of a predictable pseudo-random number generator (PRNG) for generating a secret query name. Successful exploitation can lead to a denial of service (DoS) by crashing the DNS server.
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 Connectivity Link 1 | rhcl-1/coredns-rhel9 | Affected | ||
| Red Hat OpenShift Container Platform 4 | openshift4/ose-coredns-rhel9 | Not affected | ||
| Red Hat Advanced Cluster Management for Kubernetes 2.13 | rhacm2/lighthouse-agent-rhel9 | Fixed | RHSA-2026:36873 | 08.07.2026 |
| Red Hat Advanced Cluster Management for Kubernetes 2.13 | rhacm2/lighthouse-coredns-rhel9 | Fixed | RHSA-2026:36873 | 08.07.2026 |
| Red Hat Advanced Cluster Management for Kubernetes 2.14 | rhacm2/lighthouse-agent-rhel9 | Fixed | RHSA-2026:25127 | 10.06.2026 |
| Red Hat Advanced Cluster Management for Kubernetes 2.14 | rhacm2/lighthouse-coredns-rhel9 | Fixed | RHSA-2026:25127 | 10.06.2026 |
| Red Hat Advanced Cluster Management for Kubernetes 2.15 | rhacm2/lighthouse-coredns-rhel9 | Fixed | RHSA-2026:8151 | 14.04.2026 |
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Дополнительная информация
Статус:
EPSS
7.5 High
CVSS3
Связанные уязвимости
CoreDNS is a DNS server that chains plugins. Prior to version 1.14.2, a denial of service vulnerability exists in CoreDNS's loop detection plugin that allows an attacker to crash the DNS server by sending specially crafted DNS queries. The vulnerability stems from the use of a predictable pseudo-random number generator (PRNG) for generating a secret query name, combined with a fatal error handler that terminates the entire process. This issue has been patched in version 1.14.2.
CoreDNS is a DNS server that chains plugins. Prior to version 1.14.2, ...
CoreDNS Loop Detection Denial of Service Vulnerability
EPSS
7.5 High
CVSS3