CVE-2026-41637— NLnet Labs Unbound 资源管理错误漏洞
可能的 ATT&CK 技术 1AI
T1498.002 · Reflection Amplification影响版本矩阵 1
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| NLnet Labs | Unbound | 1.22.0< 1.25.2 | affected |
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一、 漏洞 CVE-2026-41637 基础信息
漏洞信息
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Vulnerability Title
Degradation of resolution service from improperly accounted client-terminated DNS-over-QUIC queries
来源: CVE Program / CVE List V5
Vulnerability Description
In NLnet Labs Unbound 1.22.0 up to and including 1.25.1, client terminated DNS-over-QUIC (DoQ) queries are not accounted properly by Unbound resulting in low-cost inflation of the waiting number of replies for already in-flight resolution queries. This results in degradation of resolution service for new clients for already in-flight queries. A malicious actor can exploit the vulnerability by issuing DoQ queries for query names that need resolution and proceeding on immediately terminating the query by one of STOP_SENDING/RESET_STREAM/CONNECTION_CLOSE QUIC frames. Those terminated DoQ queries are not properly counted for and keep inflating the number of waiting replies for in-flight queries. When the maximum is reached, it results in silent query drops for new clients needing resolution for already in-flight queries. This vulnerability needs Unbound to be compiled with DoQ support ('--with-libngtcp2') and the 'quic-port' to be configured for the listening interfaces. Additionally, a malicious actor needs access to multiple source IPs to bypass the by-default configured 'wait-limit' option.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
来源: CVE Program / CVE List V5
Vulnerability Type
对已超过有效生命周期的资源丧失索引
来源: CVE Program / CVE List V5
Vulnerability Title
NLnet Labs Unbound 资源管理错误漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
NLnet Labs Unbound是荷兰NLnet Labs组织的域名系统解析服务器。 NLnet Labs Unbound 1.22.0版本至1.25.1版本存在资源管理错误漏洞，该漏洞源于对客户终止的DNS-over-QUIC（DoQ）查询处理不当，可能导致已发送查询的等待回复数量膨胀，造成新客户端解析服务降级。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| NLnet Labs | Unbound | 1.22.0 ~ 1.25.2 | - |
二、漏洞 CVE-2026-41637 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-41637 厂商安全公告 (1)
同批安全公告 · NLnet Labs · 2026-07-22 · 共 24 条
| CVE-2026-55973 | 7.5 HIGH | NLnet Labs Unbound 输入验证错误漏洞 |
| CVE-2026-32665 | 7.5 HIGH | NLnet Labs Unbound 输入验证错误漏洞 |
| CVE-2026-40691 | 7.5 HIGH | NLnet Labs Unbound 缓冲区错误漏洞 |
| CVE-2026-44690 | 7.5 HIGH | NLnet Labs Unbound 输入验证错误漏洞 |
| CVE-2026-50248 | 6.5 MEDIUM | NLnet Labs Unbound 输入验证错误漏洞 |
| CVE-2026-52863 | 5.9 MEDIUM | NLnet Labs Unbound 资源管理错误漏洞 |
| CVE-2026-55717 | 5.9 MEDIUM | NLnet Labs Unbound 异常处理不当漏洞 |
| CVE-2026-55991 | 5.9 MEDIUM | NLnet Labs Unbound 数字错误漏洞 |
| CVE-2026-55990 | 5.9 MEDIUM | NLnet Labs Unbound 异常处理不当漏洞 |
| CVE-2026-56444 | 5.9 MEDIUM | NLnet Labs Unbound 资源管理错误漏洞 |
| CVE-2026-14586 | 5.9 MEDIUM | NLnet Labs Unbound 异常处理不当漏洞 |
| CVE-2026-44621 | 5.9 MEDIUM | NLnet Labs Unbound 异常处理不当漏洞 |
| CVE-2026-50046 | 5.9 MEDIUM | NLnet Labs Unbound 资源管理错误漏洞 |
| CVE-2026-50045 | 5.3 MEDIUM | NLnet Labs Unbound 资源管理错误漏洞 |
| CVE-2026-50251 | 5.3 MEDIUM | NLnet Labs Unbound 输入验证错误漏洞 |
| CVE-2026-56416 | 4.8 MEDIUM | NLnet Labs Unbound 加密问题漏洞 |
| CVE-2026-46582 | 3.7 LOW | NLnet Labs Unbound 处理逻辑错误漏洞 |
| CVE-2026-44687 | 3.7 LOW | NLnet Labs Unbound 数字错误漏洞 |
| CVE-2026-54478 | 3.7 LOW | NLnet Labs Unbound 授权问题漏洞 |
| CVE-2026-42955 | 3.7 LOW | NLnet Labs Unbound 资源管理错误漏洞 |
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IV. Related Vulnerabilities
V. Comments for CVE-2026-41637
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