CVE-2025-53634: Github.com/ctfer io/chall manager Denial of Service Vulnerability

HIGH
Advisory Identifier: GHSA-ggmv-j932-q89q
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CVSS 7.5
CWE-770
Published
Advisory Summary

CVE-2025-53634 is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-770: Allocation of Resources Without Limits or Throttling) affecting Github.com/ctfer io/chall manager libraries in the Go ecosystem. The issue involves chall-manager's http gateway is vulnerable to dos due to missing header timeout. Remediation is available by upgrading affected packages to version 0.1.4.

CVE-2025-53634 at a Glance

CVE Identifier CVE-2025-53634
GHSA Identifier GHSA-ggmv-j932-q89q
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-770: Allocation of Resources Without Limits or Throttling
Affected Product Github.com/ctfer io/chall manager
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2025-53634

To remediate this vulnerability, upgrade all affected Github.com/ctfer io/chall manager dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/ctfer-io/chall-manager fixed: 0.1.4 
Upgrade github.com/ctfer-io/chall-manager to 0.1.4
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/ctfer-io/chall-manager

How to Check if You Are Affected

To determine whether your application is affected by CVE-2025-53634, inspect your project dependencies for Github.com/ctfer io/chall manager:

inspect dependencies for github.com/ctfer-io/chall-manager

Analyze the terminal output to locate any version of Github.com/ctfer io/chall manager in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.1.4), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-770: Allocation of Resources Without Limits or Throttling, where the product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated. In Github.com/ctfer io/chall manager, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact The HTTP Gateway processes headers, but with no timeout set. With a Slowloris 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. ### Patches Patch has been implemented by [commit `1385bd8`](https://github.com/ctfer-io/chall-manager/commit/1385bd869142651146cd0b123085f91cec698636) and shipped in [`v0.1.4`](https://github.com/ctfer-io/chall-manager/releases/tag/v0.1.4). ### Workarounds No workaround exist. ### References N/A

CVE-2025-53634 Affected Github.com/ctfer io/chall manager Versions

1 component(s)
Fixed Versions:
0.1.4
Product / Package Ecosystem Affected Versions Fixed Version
github.com/ctfer-io/chall-manager
golang/github.com/ctfer-io/chall-manager
Go
< 0.1.4
0.1.4

References

GitHub Advisory / Wiki ADVISORY
https://github.com/ctfer-io/chall-manager/security/advisories/GHSA-ggmv-j932-q89q
NVD — CVE-2025-53634 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-53634
Security Fix Commit FIX COMMIT
https://github.com/ctfer-io/chall-manager/commit/1385bd869142651146cd0b123085f91cec698636
Github.com/ctfer io/chall manager Source Repository REPOSITORY
https://github.com/ctfer-io/chall-manager
Github.com/ctfer io/chall manager Release RELEASE
https://github.com/ctfer-io/chall-manager/releases/tag/v0.1.4

Frequently Asked Questions

What is CVE-2025-53634?
CVE-2025-53634 is a security vulnerability in Github.com/ctfer io/chall manager involving Chall-Manager's HTTP Gateway is vulnerable to DoS due to missing header timeout under CWE-770: Allocation of Resources Without Limits or Throttling.
Which Github.com/ctfer io/chall manager versions are affected?
Affected versions include releases prior to 0.1.4 across affected packages: github.com/ctfer-io/chall-manager.
What version fixes CVE-2025-53634?
Upgrading to 0.1.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/ctfer-io/chall-manager affected?
Yes, github.com/ctfer-io/chall-manager is affected in releases prior to 0.1.4. Upgrade your dependency to 0.1.4 or later.
What is the CVSS score of CVE-2025-53634?
CVE-2025-53634 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2025-53634?
CVE-2025-53634 is classified under CWE-770: Allocation of Resources Without Limits or Throttling (The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.).
How can I check Go dependencies for CVE-2025-53634?
Run the dependency tree command: 'inspect dependencies for github.com/ctfer-io/chall-manager'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-ggmv-j932-q89q",
  "modified" : "2025-08-14T22:21:18Z",
  "published" : "2025-07-10T17:58:48Z",
  "aliases" : [ "CVE-2025-53634" ],
  "summary" : "Chall-Manager's HTTP Gateway is vulnerable to DoS due to missing header timeout",
  "details" : "### Impact\nThe HTTP Gateway processes headers, but with no timeout set. With a Slowloris attack, an attacker could cause Denial of Service (DoS).\nExploitation 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.\n\n### Patches\nPatch has been implemented by [commit `1385bd8`](https://github.com/ctfer-io/chall-manager/commit/1385bd869142651146cd0b123085f91cec698636) and shipped in [`v0.1.4`](https://github.com/ctfer-io/chall-manager/releases/tag/v0.1.4).\n\n### Workarounds\nNo workaround exist.\n\n### References\nN/A",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/ctfer-io/chall-manager"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.1.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/ctfer-io/chall-manager/security/advisories/GHSA-ggmv-j932-q89q"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-53634"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ctfer-io/chall-manager/commit/1385bd869142651146cd0b123085f91cec698636"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/ctfer-io/chall-manager"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ctfer-io/chall-manager/releases/tag/v0.1.4"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-770" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-07-10T17:58:48Z",
    "nvd_published_at" : "2025-07-10T20:15:27Z"
  }
}