CVE-2025-53634— Chall-Manager's HTTP Gateway have no header check timeout leading to potential slow loris attacks
Quick assessment
Affected
ctfer-io chall-manager
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
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。
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of Service
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2025-53634
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Chall-Manager's HTTP Gateway have no header check timeout leading to potential slow loris attacks
Source: CVE Program / CVE List V5
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: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
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
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| ctfer-io | chall-manager | < 0.1.4 | - |
|
II. Public POCs for CVE-2025-53634
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2025-53634
请登录查看更多情报信息。
Same Patch Batch · ctfer-io · 2025-07-10 · 3 CVEs total
| CVE-2025-53633 | Chall-Manager's scenario decoding process does not check for zip bombs | |
| CVE-2025-53632 | Chall-Manager's scenario decoding process does not check for zip slips |
IV. Related Vulnerabilities
Same vendor: ctfer-io
-
CVE-2026-32768
Chall-Manager's invalid NetworkPolicy enables a malicious ac -
CVE-2026-32771
Monitoring is vulnerable to Archive Slip due to missing chec -
CVE-2026-32769
Fullchain's Invalid NetworkPolicy enables a malicious actor -
CVE-2026-32805
Romeo is vulnerable to Archive Slip due to missing checks in -
CVE-2026-32737
Romeo's invalid NetworkPolicy enables a malicious actor to p
Same weakness: CWE-770
-
CVE-2026-62649
Reyrolle 7SR5 <2.70 未认证拒绝服务漏洞 -
CVE-2026-48888
WordPress WooCommerce plugin < 11.1.0 - Denial of Service At -
CVE-2026-86513
java-json-tools jackson-coreutils JSON Pointer parser TreePo -
CVE-2026-75808
ASUS Armoury Crate资源分配无限制致本地拒绝服务 -
CVE-2026-82753
Unauthenticated authorize requests create unbounded, never-e
V. Comments for CVE-2025-53634
No comments yet