The application directly processes these parameters and passes them to RPC command execution helpers without:
- Authentication verification
- Input validation/sanitization
- Method whitelist enforcement
- Parameter type checking

This allows attackers to specify arbitrary Dubbo interface methods that execute system commands.

### Attack Flow Diagram```
Internet Attacker
    |
    | Sends unauthenticated POST request
    | with malicious interfaceName/methodName
    v
Weaver E-cology HTTP Server (port 80/443)
    |
    | No authentication check
    | No authorization validation
    v
/papi/esearch/data/devops/dubboApi/debug/method endpoint
    |
    | Direct parameter pass-through to Dubbo RPC layer
    v
Dubbo RPC Framework (unvalidated interface invocation)
    |
    | Resolves arbitrary interface methods
    | Attacker-controlled method name injection
    v
Command Execution Helpers (vulnerable classes)
    |
    | Direct OS command execution via Runtime.exec()
    | or similar OS command invocation mechanisms
    v
System Command Execution
    |
    | Complete code execution as Weaver service user
    | (typically root or high-privilege account)
    |
    +-> Read sensitive files (/etc/passwd, configs)
    +-> Execute arbitrary binaries
    +-> Create reverse shells
    +-> Exfiltrate data
    +-> Establish persistence
    v
Complete System Compromise

### 일반적인 Weaver 배포 아키텍처```
Corporate Network
=================

Internet > Firewall (port 80/443 open for E-cology)
              |
              v
        Load Balancer (optional)
              |
    +---------+---------+
    |         |         |
    v         v         v
 Node1      Node2     Node3
  Web        Web       Web
 Server      Server    Server
  |          |         |
  +----------+----+----+
               |
               v
         Shared Storage
         (Documents/Config)
               |
               v
         Database Server
         (MySQL/Oracle)

Each Web Server has:
- Weaver E-cology Java application
- Embedded Tomcat/JBoss container
- Dubbo RPC framework
- VULNERABLE /papi/esearch/data/devops/dubboApi/debug/method
  endpoint (pre-patch)

def is_weaver_ecology(self, base_url):
    """Identify if target is Weaver E-cology instance"""
    for path in self.weaver_identifiers:
        try:
            url = urljoin(base_url, path)
            response = requests.get(
                url,
                timeout=self.timeout,
                verify=self.verify_ssl,
                allow_redirects=False
            )
            if response.status_code in [200, 302, 301]:
                return True
        except:
            continue
    return False

def check_vulnerability(self, base_url):
    """Check if dubboApi debug endpoint is accessible"""
    try:
        url = urljoin(base_url, self.vulnerable_endpoint)
        
        # Test with GET request
        response = requests.get(
            url,
            timeout=self.timeout,
            verify=self.verify_ssl,
            allow_redirects=False
        )
        
        # 200 (success), 405 (method not allowed), or 400 (bad request)
        # all indicate endpoint exists
        if response.status_code in [200, 400, 405]:
            return True, response.status_code
        
        # Test with POST request as fallback
        response = requests.post(
            url,
            json={},
            timeout=self.timeout,
            verify=self.verify_ssl,
            allow_redirects=False
        )
        
        if response.status_code in [200, 400, 405]:
            return True, response.status_code
        
        return False, response.status_code
        
    except requests.exceptions.RequestException:
        return False, None

def scan_target(self, base_url):
    """Scan single target"""
    result = {
        "target": base_url,
        "timestamp": datetime.utcnow().isoformat() + "Z",
        "is_weaver": False,
        "vulnerable": False,
        "endpoint_status": None,
        "risk_level": "LOW"
    }
    
    # Normalize URL
    if not base_url.startswith(("http://", "https://")):
        base_url = "http://" + base_url
    
    # Check if Weaver E-cology
    is_weaver = self.is_weaver_ecology(base_url)
    result["is_weaver"] = is_weaver
    
    if not is_weaver:
        result["risk_level"] = "LOW"
        return result
    
    # Check vulnerability
    is_vulnerable, status_code = self.check_vulnerability(base_url)
    result["endpoint_status"] = status_code
    result["vulnerable"] = is_vulnerable
    
    if is_vulnerable:
        result["risk_level"] = "CRITICAL"
    else:
        result["risk_level"] = "UNKNOWN"
    
    return result

def format_report(self, results):
    """Format scan results for display"""
    report = []
    report.append("\n[*] CVE-2026-22679 Weaver E-cology RCE Detection Scanner")
    report.append(f"[*] Scanning {len(results)} target(s)...")
    report.append("[*] Detection method: dubboApi debug endpoint accessibility check")
    report.append(f"[*] Endpoint: {self.vulnerable_endpoint}")
    report.append("[*] NOTE: No commands are executed. Safe, non-destructive scan.\n")
    report.append("=" * 70)
    
    for result in results:
        report.append(f"\nTarget: {result['target']}")
        report.append(f"Scan Time: {result['timestamp']}")
        report.append(f"Risk Level: {result['risk_level']}")
        report.append("=" * 70)
        report.append(f"  Is Weaver E-cology:    {'YES' if result['is_weaver'] else 'NO'}")
        report.append(f"  Debug Endpoint:        {'ACCESSIBLE' if result['vulnerable'] else 'NOT ACCESSIBLE'}")
        report.append(f"  Endpoint HTTP Status:  {result['endpoint_status']}")
        report.append(f"  Vulnerable:            {'YES' if result['vulnerable'] else 'NO'}")
        
        if result["vulnerable"]:
            report.append("")
            report.append("  *** CRITICAL: dubboApi debug endpoint is exposed! ***")
            report.append("  *** Unauthenticated RCE via interfaceName/methodName injection ***")
            report.append(f"  *** Endpoint: {self.vulnerable_endpoint} ***")
            report.append("  *** Update to build 20260312 or block this endpoint immediately ***")
    
    report.append("\n" + "=" * 70)
    return "\n".join(report)

args = parser.parse_args()

scanner = WeaverEcologyScanner(timeout=args.timeout, verify_ssl=not args.no_verify_ssl)

results = []
for target in args.targets:
    result = scanner.scan_target(target)
    results.append(result)

print(scanner.format_report(results))

# Exit with error if any vulnerabilities found
if any(r["vulnerable"] for r in results):
    sys.exit(1)
sys.exit(0)

**사용 예시:**```bash
# Scan single target
python3 CVE-2026-22679_Weaver_Ecology_RCE_detector.py http://target.com

# Scan multiple targets
python3 CVE-2026-22679_Weaver_Ecology_RCE_detector.py http://target1.com http://target2.com

# Scan with custom timeout
python3 CVE-2026-22679_Weaver_Ecology_RCE_detector.py http://target.com --timeout 5

# Scan with SSL verification disabled
python3 CVE-2026-22679_Weaver_Ecology_RCE_detector.py https://target.com --no-verify-ssl

### Nmap NSE 스크립트

**파일명:** `CVE-2026-22679_Weaver_Ecology_RCE.nse`

**설명:** Nmap 워크플로우와 통합된 취약점 탐지를 위한 Nmap NSE 스크립트입니다.```lua
-- CVE-2026-22679 Weaver E-cology RCE Detection Script
-- Detects vulnerable dubboApi debug endpoint exposure
-- Author: Kerem Oruc (@keraattin)

local http = require "http"
local shortport = require "shortport"
local stdnse = require "stdnse"
local vulns = require "vulns"

description = [[
Detects Weaver E-cology instances vulnerable to CVE-2026-22679.
This vulnerability allows unauthenticated remote code execution through
the exposed dubboApi debug endpoint at /papi/esearch/data/devops/dubboApi/debug/method
]]

author = "Kerem Oruc (@keraattin)"
license = "Same as Nmap--See https://nmap.org/COPYING"
categories = {"vuln", "safe"}

portrule = shortport.http

local VULNERABLE_ENDPOINT = "/papi/esearch/data/devops/dubboApi/debug/method"
local WEAVER_IDENTIFIERS = {
  "/login/Login.jsp",
  "/wui/index.html",
  "/UploadFiles/"
}

local function is_weaver_ecology(host, port)
  for _, path in ipairs(WEAVER_IDENTIFIERS) do
    local response = http.get(host, port, path)
    if response.status and response.status >= 200 and response.status < 400 then
      return true
    end
  end
  return false
end

local function check_vulnerability(host, port)
  local response = http.get(host, port, VULNERABLE_ENDPOINT)
  
  if response.status then
    -- 200 (OK), 400 (Bad Request), 405 (Method Not Allowed)
    -- all indicate the endpoint exists (unpatched)
    if response.status == 200 or response.status == 400 or response.status == 405 then
      return true, response.status
    end
  end
  
  -- Try POST as fallback
  local response = http.post(host, port, VULNERABLE_ENDPOINT, nil, {}, "")
  if response.status then
    if response.status == 200 or response.status == 400 or response.status == 405 then
      return true, response.status
    end
  end
  
  return false, response.status or "unknown"
end

action = function(host, port)
  local vuln_table = {
    title = "Weaver E-cology Unauthenticated RCE (CVE-2026-22679)",
    state = vulns.STATE.UNKNOWN,
    risk_level = "CRITICAL",
    IDS = {
      CVE = "CVE-2026-22679",
      CWE = "CWE-94"
    },
    description = [[
The dubboApi debug endpoint is exposed without authentication.
An attacker can send POST requests with crafted parameters to
achieve remote code execution through parameter injection.
    ]],
    references = {
      "https://nvd.nist.gov/vuln/detail/CVE-2026-22679",
    },
    dates = {
      disclosure = {year = 2026, month = 3, day = 31},
      discovery = {year = 2026, month = 3, day = 12}
    }
  }
  
  local vuln_report = vulns.Report:new(VULNERABLE_ENDPOINT, host, port)
  
  -- Check if target is Weaver E-cology
  if not is_weaver_ecology(host, port) then
    vuln_table.state = vulns.STATE.NOT_VULN
    return vuln_report:make_output(vuln_table)
  end
  
  -- Check if vulnerable endpoint is accessible
  local is_vulnerable, status_code = check_vulnerability(host, port)
  
  if is_vulnerable then
    vuln_table.state = vulns.STATE.VULNERABLE
    vuln_table.extra_info = string.format(
      "Debug endpoint accessible at %s (HTTP %d)",
      VULNERABLE_ENDPOINT,
      status_code
    )
  else
    vuln_table.state = vulns.STATE.NOT_VULN
  end
  
  return vuln_report:make_output(vuln_table)
end

**Example Output:**```
PORT   STATE SERVICE
80/tcp open  http
| CVE-2026-22679_Weaver_Ecology_RCE:
|   VULNERABLE:
|   Weaver E-cology Unauthenticated RCE (CVE-2026-22679)
|     State: VULNERABLE
|     Risk level: CRITICAL
|     Debug endpoint: accessible at /papi/esearch/data/devops/dubboApi/debug/method
|     Description:
|       The dubboApi debug endpoint is exposed without authentication.
|       An attacker can send POST requests with crafted parameters to
|       achieve remote code execution. Update to build 20260312.
|     Discovery Date: 2026-03-12
|     Disclosure Date: 2026-03-31
|     IDs:
|       CVE: CVE-2026-22679
|       CWE: CWE-94 (Code Injection)
|     References:
|_      https://nvd.nist.gov/vuln/detail/CVE-2026-22679

**애플리케이션 로그:**

- Dubbo RPC 호출과 관련된 예외 또는 오류
- RPC 프레임워크 로그의 검증되지 않은 파라미터 경고
- ClassNotFoundException 또는 메서드 호출 실패
- 예상치 못한 인터페이스 해석 시도

### 호스트 기반 지표

- Weaver Java 프로세스에서 생성된 예상치 못한 자식 프로세스
- 시스템에 생성된 새 사용자 계정
- Weaver 서비스의 예상치 못한 네트워크 연결
- Weaver 구성 파일의 수정
- Weaver 디렉터리에 존재하는 웹셸
- 시스템 디렉터리에 대한 비정상적인 파일 쓰기
- 의심스러운 cronjob 또는 서비스 항목

### 파일 시스템 지표

- `/tmp/` 또는 `/var/tmp/`에 존재하는 예상치 못한 파일
- 수정된 Weaver JAR 파일 또는 구성 파일
- 웹 접근 가능 디렉터리에 존재하는 새 셸 스크립트
- 일반적인 웹셸 파일명(shell.jsp, cmd.jsp 등)의 존재

---

## 대응 조치

### 즉시 조치(0-24시간)

1. **디버그 엔드포인트에 대한 네트워크 접근 차단**

   취약한 엔드포인트에 대한 접근을 차단하도록 방화벽 규칙을 추가합니다:   ```
   # iptables example
   iptables -I INPUT -p tcp --dport 80 -m string --string "/papi/esearch/data/devops/dubboApi" --algo bm -j DROP
   
   # nginx example
   location /papi/esearch/data/devops/dubboApi {
       return 403;
   }
   
   # Apache example
   <Location "/papi/esearch/data/devops/dubboApi">
       Deny from all
   </Location>