Document Title: =============== 123ContactForm - Cross Site Scripting Web Vulnerability Date: ===== 2017-06-12 References: =========== https://www.vulnerability-lab.com/get_content.php?id=1982 Ref: 123-1476631846 VL-ID: ===== 1982 Common Vulnerability Scoring System: ==================================== 3.3 Vulnerability Class: ==================== Cross Site Scripting - Non Persistent Introduction: ============= 123ContactForm is a service developed by a team of dedicated professionals in Timisoara, Romania. Founded in 2008, 123ContactForm has customers around the world who choose our products every time they build online forms and surveys. (Copy of the Vendor Hompage: https://www.123contactform.com/ ) Abstract: ========= An independent vulnerability laboratory researcher discovered a client side cross site scripting vulnerability in the official 123ContactForm web-application. Report-Timeline: ================ 2016-10-16: Researcher Notification & Coordination (ZwX) 2016-10-17: Vendor Notification (123ContactForm Support Team) 2017-06-12: Public Disclosure (Vulnerability Laboratory) Status: ======== Published Affected Products: ================== 123ContactForm Product: 123ContactForm - Web Application v2016 Q4 Exploitation-Technique: ======================= Remote Severity: ========= Medium Details: ======== A client-side cross site scripting vulnerability has been discovered in the 123Contact Form web-application. The security vulnerability allows remote attackers to inject malicious script codes to client-side browser requests. A client-side cross site scripting web vulnerability is located in the `Location` input field. The web vulnerability could allow remote attackers to execute javascript in the web-browser of an user or administrator to compromise session credentials. The attacker can connect to a third account to trigger the issue without knowing the password. The security risk of the xss vulnerability is estimated as medium with a cvss (common vulnerability scoring system) count of 3.3. Exploitation of the non-persistent cross site scripting web vulnerability requires low or medium user interaction and no privileged web-application user account. 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 Module(s): [+] Location - Map Pro Vulnerable File(s): [+] ajax_save_field.php Vulnerable Parameter(s): [+] value Proof of Concept: ================= The cross site vulnerability can be exploited by remote attackers with web-application user account and with low or medium user interaction. For security demonstration or to reproduce the security web vulnerability follow the provided information and steps below to continue. Manual steps to reproduce the vulnerability ... 1. Create an user account 2. Connect to the dashboard and click on "Create New Form" 3. Click on "Event Registration Form" 4. Click on the Map Google at buttom and click on the link "Customize Map" 5. Customize Map opens a window 6. Copy paste the vector ( '"> ) in input "Location" to execute via value 6. Finally click "Save" 7. A messagebox appreas on execute successfully by the value parameter --- PoC Pictures --- http://zwx.fr/POCXSS.PNG http://zwx.fr/POCXSS2.PNG PoC: URL https://123contactform.localhost/ajax_save_field.php ?cid=22812003&fid=2248753&pro=map_c_values& islikert=0&value=[CLIENT SIDE SCRIPT CODE INJECT!]& selectedformcreated=1476438146&selecteduser=1077591& cacheKiller=0.05597585558969986&selectedFieldControl=0& containerForEditorActions=1 --- PoC Session Logs [GET] --- Status: 200 [OK] Host: www.123contactform.com User-Agent: Mozilla/5.0 (Windows NT 10.0; rv:49.0) Gecko/20100101 Firefox/49.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: fr,fr-FR;q=0.8,en-US;q=0.5,en;q=0.3 Accept-Encoding: gzip, deflate, br theToken: d2767e1cdf526c38c5a8d14e8 Referer: https://www.123contactform.com/index.php?p=edit_fields&id=2248753&action=firsttime Cookie: x-channel=website; x-subchannel=website; x-source=organic; user_type=unknown; x-campaign=no-campaign; x-landing=%2Fsecurity-acknowledgements.htm; 123cf=64AEAFD7-855C-40D4-BAEE-406B081CF758; referer123cookie=http%3A%2F%2Fbugsheet.com%2Fdirectory; AWSELB=596B2BAD0280A921E426D1B649308CC69A1C856B743EDCBCE34D07E0A9EC55A2DFD9A6A3D2B6C5F677E4C749D525B848D39C268A28FBC6E570CCD431ECA0C0ECD30A1D13A4; SnapABugHistory=2#; _ga=GA1.2.2031563181.1476410572; __ar_v4=WFH7JRHHDNEVZPPCUQ2ABR%3A20161013%3A54%7CMLVDQJATP5EPDMGBRC5TRU%3A20161013%3A54%7CILTNEPP2HZFL7AMBEUMFOE%3A20161013%3A54; __reff=[[www.123contactform.com/security-acknowledgements.htm]]bugsheet.com&1476410574641.1476412397387.7|[[www.123contactform.com/index.php]](direct)&1476437441090.1476437441090.1; spid=CD6108C6-3D7D-491B-8934-5156A4E6A99B; sp_apnxid=3900529803954807116; mktz_client=%7B%22is_returning%22%3A%221%22%2C%22uid%22%3A%2213325530231307318897%22%2C%22session%22%3A%22ses499300756ion%22%2C%22views%22%3A2%2C%22referer_url%22%3A%22http%3A//www.123contactform.com/security-acknowledgements.htm%22%2C%22referer_domain%22%3A%22www.123contactform.com%22%2C%22referer_type%22%3A%22refferal%22%2C%22visits%22%3A1%2C%22landing%22%3A%22http%3A//www.123contactform.com/%22%2C%22enter_at%22%3A%222016-10-14%7C4%3A3%3A14%22%2C%22first_visit%22%3A%222016-10-14%7C4%3A3%3A14%22%2C%22last_visit%22%3A%222016-10-14%7C4%3A3%3A14%22%2C%22last_variation%22%3A%22%22%2C%22utm_source%22%3Afalse%2C%22utm_term%22%3Afalse%2C%22utm_campaign%22%3Afalse%2C%22utm_content%22%3Afalse%2C%22utm_medium%22%3Afalse%7D; optimizelySegments=%7B%223013120790%22%3A%22false%22%2C%223022890169%22%3A%22direct%22%2C%223024180249%22%3A%22ff%22%7D; optimizelyEndUserId=oeu1476410633006r0.5762439056508796; optimizelyBuckets=%7B%7D; __utma=95039516.2031563181.1476410572.1476410679.1476410679.1; __utmz=95039516.1476410679.1.1.utmcsr=(direct)|utmccn=(direct)|utmcmd=(none); PHPSESSID=1s49us046u1nca63s90a4lbpq2; SnapABugRef=http%3A%2F%2Fwww.123contactform.com%2Fsecurity-acknowledgements.htm%20http%3A%2F%2Fbugsheet.com%2Fdirectory; SnapABugVisit=27#1476437435; sp_ssid=1476437441027; __sreff=1476437441090.1476437441090.1; UTM_usrprf=0%7C1476410503; UTM_last_login=1476437278; acknowledgeCookie=1; _gat_UA-305159-5=1; SnapABugChatWindow=%7C0%7C-1%2C0%2C-1%2C0 Connection: keep-alive - https://www.123contactform.com/ajax_save_field.php?cid=22812003&fid=2248753&pro=map_c_values&islikert=0&value='">&selectedformcreated=1476438146&selecteduser=1077591&cacheKiller=0.05597585558969986&selectedFieldControl=0&containerForEditorActions=1 Solution: ========= The vulnerability can be patched by a secure parse of the vulnerable value parameter in the affected ajax php file. Restrict the input by disallowing the usage of special chars and filter for script code tags. Encode the vulnerable output location by a parse of the context to prevent an execute of malicious script codes in the formular. Risk: ===== The security risk of the client-side cross site scripting web vulnerability in the web-application contact form is estimated as medium. (CVSS 3.2) Credits: ======== ZwX - ( http://zwx.fr ) [ http://www.vulnerability-lab.com/show.php?user=ZwX ] Disclaimer: =========== 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. Some states do not allow the exclusion or limitation of liability mainly for incidental or consequential damages so the foregoing limitation may not apply. We do not approve or encourage anybody to break any licenses, policies, deface websites, hack into databases or trade with stolen data. We have no need for criminal activities or membership requests. We do not publish advisories or vulnerabilities of religious-, militant- and racist- hacker/analyst/researcher groups or individuals. We do not publish trade researcher mails, phone numbers, conversations or anything else to journalists, investigative authorities or private individuals. Domains: www.vulnerability-lab.com - www.vulnerability-db.com - www.evolution-sec.com Programs: vulnerability-lab.com/submit.php - vulnerability-lab.com/list-of-bug-bounty-programs.php - vulnerability-lab.com/register.php Feeds: vulnerability-lab.com/rss/rss.php - vulnerability-lab.com/rss/rss_upcoming.php - vulnerability-lab.com/rss/rss_news.php Social: twitter.com/vuln_lab - facebook.com/VulnerabilityLab - youtube.com/user/vulnerability0lab Any modified copy or reproduction, including partially usages, of this file, resources or information requires authorization from Vulnerability Laboratory. Permission to electronically redistribute this alert in its unmodified form is granted. All other rights, including the use of other media, are reserved by Vulnerability Lab Research Team or its suppliers. All pictures, texts, advisories, source code, videos and other information on this website is trademark of vulnerability-lab team & the specific authors or managers. To record, list, modify, use or edit our material contact (admin@) to get an ask permission. Copyright © 2017 | Vulnerability Laboratory - [Evolution Security GmbH]™