FOSCAM IP-Cameras Improper Access Restrictions

Type packetstorm
Reporter Core Security Technologies
Modified 2013-07-23T00:00:00


                                            `Core Security - Corelabs Advisory  
FOSCAM IP-Cameras Improper Access Restrictions  
1. *Advisory Information*  
Title: FOSCAM IP-Cameras Improper Access Restrictions  
Advisory ID: CORE-2013-0613  
Advisory URL:  
Date published: 2013-07-23  
Date of last update: 2013-07-23  
Vendors contacted: Foscam  
Release mode: User release  
2. *Vulnerability Information*  
Class: Information Exposure [CWE-200]  
Impact: Security bypass  
Remotely Exploitable: Yes  
Locally Exploitable: No  
CVE Name: CVE-2013-2574  
3. *Vulnerability Description*  
Due to improper access restriction the FOSCAM FI8620 device [1] allows a  
remote attacker to browse and access arbitrary files from the following  
directories '/tmpfs/' and '/log/' without requiring authentication. This  
could allow a remote attacker to obtain valuable information such as  
access credentials, Wi-Fi configuration and other sensitive information  
in plain text.  
The list of affected files includes, but is not limited to, the following:  
. 'http://<target_ip>/tmpfs/config_backup.bin'  
. 'http://<target_ip>/tmpfs/config_restore.bin'  
. 'http://<target_ip>/tmpfs/ddns.conf'  
. 'http://<target_ip>/tmpfs/syslog.txt'  
. 'http://<target_ip>/log/syslog.txt'  
4. *Vulnerable Packages*  
. FOSCAM FI8620 PTZ Camera.  
. Other Foscam devices based on the same firmware are probably  
affected too, but they were not checked.  
5. *Non-Vulnerable Packages*  
Vendor did not provide details. Contact Foscam for further information.  
6. *Vendor Information, Solutions and Workarounds*  
There was no official answer from Foscam after several attempts (see  
[Sec. 9]); contact vendor for further information. Some mitigation  
actions may be do not expose the camera to internet unless absolutely  
necessary and have at least one proxy filtering HTTP requests to the  
following resources:  
. '/tmpfs/config_backup.bin'  
. '/tmpfs/config_restore.bin'  
. '/tmpfs/ddns.conf'  
. '/tmpfs/syslog.txt'  
. '/log/syslog.txt'  
7. *Credits*  
This vulnerability was discovered by Flavio de Cristofaro and researched  
with the help of Andres Blanco from Core Security Technologies. The  
publication of this advisory was coordinated by Fernando Miranda from  
Core Advisories Team.  
8. *Technical Description / Proof of Concept Code*  
8.1. *Accessing Manufacturer DDNS configuration*  
By requesting the following URL using your default web browser:  
you will see something like this:  
UserName=<target username>  
Password=<target plain password>  
Domain=<target username>;  
8.2. *Access Credentials Stored in Backup Files*  
When a configuration backup is required by an operator/administrator,  
the backup is generated in the local folder 'tmpfs' named as  
'config_backup.bin'. The binary file is just a dump of the whole  
configuration packed as Gzip and can be accessed by accessing the  
following URL:  
The presence of this temporary file enables an unauthenticated attacker  
to download the configuration files which contain usernames, plaintext  
passwords (including admin passwords), Wifi configuration including  
plain PSK, among other interesting stuff as shown below:  
username = "admin "  
password = "admin "  
authtype = "15 "   
authgroup = " "  
username = "user "  
password = "user "  
authtype = "3 "   
authgroup = " "  
username = "guest "  
password = "guest "  
authtype = "1 "   
authgroup = " "  
It is important to mention that, in order to access the configuration  
file previously mentioned, an operator and/or administrator should have  
executed the backup process in advance.  
9. *Report Timeline*  
. 2013-06-12:  
Core Security Technologies notifies the Foscam team of the vulnerability.  
. 2013-06-12:  
Vendor acknowledges the receipt of the email and asks for technical  
. 2013-06-13:  
A draft report with technical details and a PoC is sent to vendor.  
Publication date is set for Jul 3rd, 2013.  
. 2013-06-17:  
Core asks if the vulnerabilities are confirmed.  
. 2013-06-17:  
Foscam product team notifies that they have checked CORE's website [2],  
but there is no Foscam info.  
. 2013-06-18:  
Core notifies that the advisory has not been published yet and re-sends  
technical details and proof of concept.  
. 2013-06-26:  
CORE asks for a reply.  
. 2013-07-03:  
First release date missed.  
. 2013-07-03:  
Core asks for a reply.  
. 2013-07-11:  
Core notifies that the issues were reported 1 month ago and there was no  
reply since [2013-06-18].  
. 2013-07-23:  
Core releases the advisory CORE-2013-0613 tagged as user-release.  
10. *References*  
[1] Foscam FI8620 -  
[2] CORE Security Advisories  
11. *About CoreLabs*  
CoreLabs, the research center of Core Security Technologies, is charged  
with anticipating the future needs and requirements for information  
security technologies. We conduct our research in several important  
areas of computer security including system vulnerabilities, cyber  
attack planning and simulation, source code auditing, and cryptography.  
Our results include problem formalization, identification of  
vulnerabilities, novel solutions and prototypes for new technologies.  
CoreLabs regularly publishes security advisories, technical papers,  
project information and shared software tools for public use at:  
12. *About Core Security Technologies*  
Core Security Technologies enables organizations to get ahead of threats  
with security test and measurement solutions that continuously identify  
and demonstrate real-world exposures to their most critical assets. Our  
customers can gain real visibility into their security standing, real  
validation of their security controls, and real metrics to more  
effectively secure their organizations.  
Core Security's software solutions build on over a decade of trusted  
research and leading-edge threat expertise from the company's Security  
Consulting Services, CoreLabs and Engineering groups. Core Security  
Technologies can be reached at +1 (617) 399-6980 or on the Web at:  
13. *Disclaimer*  
The contents of this advisory are copyright (c) 2013 Core Security  
Technologies and (c) 2013 CoreLabs, and are licensed under a Creative  
Commons Attribution Non-Commercial Share-Alike 3.0 (United States)  
14. *PGP/GPG Keys*  
This advisory has been signed with the GPG key of Core Security  
Technologies advisories team, which is available for download at