Flexwatch Authorization Bypassing and XSS Vulnerability

Description:

Multiple FlexWATCH Network Cameras are vulnerable to cross-site scripting, caused by improper validation of user-supplied input by the built-in Web server. A remote attacker could exploit this vulnerability using unspecified scripts and parameters to execute arbitrary script in a victim’s Web browser within the security context of the affected device, allowing the attacker to steal the victim’s cookie-based authentication credentials.

*CVSS:

Base Score: 3.7
Access Vector: Remote
Access Complexity: High
Authentication: Not Required
Confidentiality Impact: Partial
Integrity Impact: Partial
Availability Impact: None
Temporal Score: 2.7
Exploitability: Unproven
Remediation Level: Official-Fix
Report Confidence: Confirmed

Consequences:

Gain Access

Remedy:

Refer to the FlexWATCH Web site for patch information. See References.

References:

  • BugTraq Mailing List, Mon Jul 10 2006 – 04:38:31 CDT : Digital Armaments Security Advisory 10.07.2006: Flexwath Authorization Bypassing and XSS Vulnerability.
  • FlexWATCH Web site: FlexWATCH – Network Camera Server.
  • BID-18936: FlexWATCH Network Camera Cross-Site Scripting Vulnerability
  • CVE-2006-3603: Cross-site scripting (XSS) vulnerability in index.php in FlexWATCH Network Camera 3.0 and earlier allows remote attackers to inject arbitrary web script or HTML via the URL.
  • SA20994: FlexWATCH Network Camera FW-3400 Two Vulnerabilities


I. Background

FlexWATCH is a stand-alone network camera server with built-in CMOS camera and web server which deliver crisp real time
live videos at a rate up to 30fps over the network. It is normally used as security camera.
For further information or detail about the software you can refer to the vendor's homepage:

http://www.flexwatch.com/

II. Problem Description

Flexwatch Network Cameras are vulnerable to two security flaws, allowing a cross site scripting and bypassing the
protected areas. Here detailed:

- Cross-site scripting:

An attacker can cause a Cross-site-scripting:
http://camera/%3Cscript%3Ealert('www.eazel.es')%3C/script%3E

- Authorization Bypassing:

An attacker can bypass the protection of protected pages using /..%2f and access to administrative area:
Network Camera V3.0: http://camera/..%2fadmin/aindex.asp
Networks Camera Prior versions: http://camera/app/..%2fadmin/aindex.htm

III. Detection

This problem has been detected on latest and older version of Flexwatch Network Cameras.
Network Camera Versions tested on:
- ver 3.0 for FW-3400-A(PAL)
- ver 2.0 (PAL)
- ver 2.3 (NTSC)

IV. Impact analysis

Successful exploitation allow an attacker to bypass authorization and access the image/video of the security camera.
Cross site attacks are also possible.

V. Solution

First notification 04.16.2006.
Second notification 04.22.2006.
No answer from the vendor.

VI. Credit

Jaime Blasco - jaime.blasco () eazel es is credited with this discovery.

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VII. Legal Notices

Copyright © 2006 Digital Armaments LLC.

Redistribution of this alert electronically is allowed. It should not be edited in any way. Reprint the whole is
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for permission.

Disclaimer: The information in the advisory is believed to be accurate at the time of publishing based on currently
available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no
warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct,
indirect, or consequential loss or damage arising from use of, or reliance on, this information.

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