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I. Basic Information for CVE-2025-53634
Vulnerability Information

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Vulnerability Title
Chall-Manager's HTTP Gateway have no header check timeout leading to potential slow loris attacks
Source: NVD (National Vulnerability Database)
Vulnerability Description
Chall-Manager is a platform-agnostic system able to start Challenges on Demand of a player. The HTTP Gateway processes headers, but with no timeout set. With a slow loris attack, an attacker could cause Denial of Service (DoS). Exploitation does not require authentication nor authorization, so anyone can exploit it. It should nonetheless not be exploitable as it is highly recommended to bury Chall-Manager deep within the infrastructure due to its large capabilities, so no users could reach the system. Patch has been implemented by commit 1385bd8 and shipped in v0.1.4.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
不加限制或调节的资源分配
Source: NVD (National Vulnerability Database)
Vulnerability Title
Chall-Manager 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Chall-Manager是CTFer.io开源的一个开源项目。 Chall-Manager 0.1.4之前版本存在安全漏洞,该漏洞源于HTTP网关未设置超时,可能导致慢速loris攻击引发拒绝服务。
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
VendorProductAffected VersionsCPESubscribe
ctfer-iochall-manager < 0.1.4 -
II. Public POCs for CVE-2025-53634
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III. Intelligence Information for CVE-2025-53634
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IV. Related Vulnerabilities
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