Document Title: =============== Yahoo Babelfish Service - Cross Site Scripting Vulnerability References (Source): ==================== http://www.vulnerability-lab.com/get_content.php?id=349 Release Date: ============= 2011-12-21 Vulnerability Laboratory ID (VL-ID): ==================================== 349 Common Vulnerability Scoring System: ==================================== 2.5 Product & Service Introduction: =============================== Yahoo! Inc. (NASDAQ: YHOO) is an American multinational internet corporation headquartered in Sunnyvale, California, United States. The company is perhaps best known for its web portal, search engine (Yahoo! Search), Yahoo! Directory, Yahoo! Mail, Yahoo! News, Yahoo! Groups, Yahoo! Answers, advertising, online mapping (Yahoo! Maps), video sharing (Yahoo! Video), and social media websites and services. It is one of the largest websites in the United States. Yahoo! inclusive was founded by Jerry Yang and David Filo in January 1994 and was incorporated on March 1, 1995. On January 13, 2009, Yahoo! appointed Carol Bartz, former executive chairman of Autodesk, as its new chief executive officer and a member of the board of directors. On September 6, 2011, Bartz was removed from her position at Yahoo! by chairman Roy Bostock and CFO Tim Morse was named as Interim CEO of the company. According to news sources roughly 700 million people visit Yahoo websites every month. Yahoo! itself claims it attracts more than half a billion consumers every month in more than 30 languages . (Copy of the Vendor Homepage: http://en.wikipedia.org/wiki/Yahoo!) Abstract Advisory Information: ============================== A Vulnerability-Lab researcher discovered a persistent cross site scripting vulnerability on the yahoo babelfish translation service. Vulnerability Disclosure Timeline: ================================== 2011-12-22: Public or Non-Public Disclosure Discovery Status: ================= Published Exploitation Technique: ======================= Remote Severity Level: =============== Low Technical Details & Description: ================================ A cross site scripting vulnerability is detected on the yahoo babelfish website. The vulnerability allows remote attackers to hijack yahoo customer sessions via cross site scripting. Successful exploitation of the application-side vulnerability can result in session hijacking & account steal. Vulnerable Module(s): [+] Yahoo! Babel Fish Translator - \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\"Translate a web page\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\" Affected Module(s): [+] babelfish.yahoo.com Picture(s): ../yahoo.png Proof of Concept (PoC): ======================= The vulnerabilities can be exploited by remote attackers on client-side via required user inter action. For demonstration or reproduce ... PoC: 1. create a html file 2. paste this code inside 3. host it somewhere ... "> 4. start your save request 5. Result: Execution of script code on application-side (persistent) out of the web translation website context Reference(s): http://babelfish.yahoo.com/ Security Risk: ============== The security risk of the persistent cross site scripting vulnerability is estimated as medium. Credits & Authors: ================== Vulnerability Research Laboratory - Ucha Gobejishvili (longrifle0x) 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. 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