CVE-2025-53634 - CVE House
Back to Database
Status published High CVE-2025-53634

Chall-Manager's HTTP Gateway have no header check timeout leading to potential slow loris attacks

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2025-53634

Credits & Attribution

No credits recorded in the NVD database.

References

More from ctfer-io

View All →
CVE-2025-53633
Chall-Manager's scenario decoding process does not check for zip bombs
High 8.7
CVE-2025-53632
Chall-Manager's scenario decoding process does not check for zip slips
High 8.8

Affected Vendor

Affected Software

chall-manager
Vulnerable Versions:
< 0.1.4

Timeline

Official Publish: July 10th, 2025
Last Modified: July 10th, 2025
Added to House: July 22nd, 2026

CVSS Vectors

Weaknesses (CWE)

CWE-770

MITRE ATT&CK TTPs

T1499 Endpoint Denial of Service
Impact
T1498 Network Denial of Service
Impact
T1190 Exploit Public-Facing Application
Initial Access
T1562 Impair Defenses
Defense Evasion
T1046 Network Service Discovery
Discovery