一、 漏洞 CVE-2025-47950 基础信息
漏洞信息
                                        # CoreDNS 可能通过流放大遭受到 DoQ 内存耗尽攻击

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漏洞标题
CoreDNS Vulnerable to DoQ Memory Exhaustion via Stream Amplification
来源：美国国家漏洞数据库 NVD
漏洞描述信息
CoreDNS is a DNS server that chains plugins. In versions prior to 1.12.2, a Denial of Service (DoS) vulnerability exists in the CoreDNS DNS-over-QUIC (DoQ) server implementation. The server previously created a new goroutine for every incoming QUIC stream without imposing any limits on the number of concurrent streams or goroutines. A remote, unauthenticated attacker could open a large number of streams, leading to uncontrolled memory consumption and eventually causing an Out Of Memory (OOM) crash — especially in containerized or memory-constrained environments. The patch in version 1.12.2 introduces two key mitigation mechanisms: `max_streams`, which caps the number of concurrent QUIC streams per connection with a default value of `256`; and `worker_pool_size`, which Introduces a server-wide, bounded worker pool to process incoming streams with a default value of `1024`. This eliminates the 1:1 stream-to-goroutine model and ensures that CoreDNS remains resilient under high concurrency. Some workarounds are available for those who are unable to upgrade. Disable QUIC support by removing or commenting out the `quic://` block in the Corefile, use container runtime resource limits to detect and isolate excessive memory usage, and/or monitor QUIC connection patterns and alert on anomalies.
来源：美国国家漏洞数据库 NVD
CVSS信息
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
来源：美国国家漏洞数据库 NVD
漏洞类别
不加限制或调节的资源分配
来源：美国国家漏洞数据库 NVD
二、漏洞 CVE-2025-47950 的公开POC
# POC 描述 源链接 神龙链接
三、漏洞 CVE-2025-47950 的情报信息