CVE-2025-30193— Denial of service via crafted TCP exchange
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I. Basic Information for CVE-2025-30193
Vulnerability Information
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Vulnerability Title
Denial of service via crafted TCP exchange
Source: NVD (National Vulnerability Database)
Vulnerability Description
In some circumstances, when DNSdist is configured to allow an unlimited number of queries on a single, incoming TCP connection from a client, an attacker can cause a denial of service by crafting a TCP exchange that triggers an exhaustion of the stack and a crash of DNSdist, causing a denial of service. The remedy is: upgrade to the patched 1.9.10 version. A workaround is to restrict the maximum number of queries on incoming TCP connections to a safe value, like 50, via the setMaxTCPQueriesPerConnection setting. We would like to thank Renaud Allard for bringing this issue to our attention.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
未经控制的递归
Source: NVD (National Vulnerability Database)
Vulnerability Title
DNSdist 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
DNSdist是DNSdist开源的一款高度感知 DNS、DoS 和滥用的负载均衡器。 DNSdist存在安全漏洞，该漏洞源于TCP连接查询限制不当，可能导致拒绝服务攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2025-30193
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IV. Related Vulnerabilities
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