CVE-2025-52434— Apache Tomcat: APR/Native Connector crash leading to DoS
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I. Basic Information for CVE-2025-52434
Vulnerability Information
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Vulnerability Title
Apache Tomcat: APR/Native Connector crash leading to DoS
Source: NVD (National Vulnerability Database)
Vulnerability Description
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') vulnerability in Apache Tomcat when using the APR/Native connector. This was particularly noticeable with client initiated closes of HTTP/2 connections. This issue affects Apache Tomcat: from 9.0.0.M1 through 9.0.106. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 through 8.5.100. Other, older, EOL versions may also be affected. Users are recommended to upgrade to version 9.0.107, which fixes the issue.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
使用共享资源的并发执行不恰当同步问题(竞争条件)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Apache Tomcat 竞争条件问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Tomcat是美国阿帕奇（Apache）基金会的一款轻量级Web应用服务器。用于实现对Servlet和JavaServer Page（JSP）的支持。 Apache Tomcat 9.0.0.M1至9.0.106版本存在竞争条件问题漏洞，该漏洞源于竞争条件，可能导致HTTP/2连接问题。
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
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Apache Software Foundation | Apache Tomcat | 9.0.0.M1 ~ 9.0.106 | - |
II. Public POCs for CVE-2025-52434
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|---|
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Same Patch Batch · Apache Software Foundation · 2025-07-10 · 11 CVEs total
| CVE-2024-42516 | Apache HTTP Server: HTTP response splitting | |
| CVE-2024-43204 | Apache HTTP Server: SSRF with mod_headers setting Content-Type header | |
| CVE-2024-47252 | Apache HTTP Server: mod_ssl error log variable escaping | |
| CVE-2024-43394 | Apache HTTP Server: SSRF on Windows due to UNC paths | |
| CVE-2025-23048 | Apache HTTP Server: mod_ssl access control bypass with session resumption | |
| CVE-2025-49630 | Apache HTTP Server: mod_proxy_http2 denial of service | |
| CVE-2025-49812 | Apache HTTP Server: mod_ssl TLS upgrade attack | |
| CVE-2025-53020 | Apache HTTP Server: HTTP/2 DoS by Memory Increase | |
| CVE-2025-52520 | Apache Tomcat: DoS via integer overflow in multipart file upload | |
| CVE-2025-53506 | Apache Tomcat: DoS via excessive h2 streams at connection start |
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