Cross-Site Scripting (XSS Reflected) in Movistar
Reflected XSS vulnerability on the Movistar Spain platform that allowed the capture of session cookies.
Antecedentes
Movistar is Telefónica's commercial brand for telecommunications services in Spain and other countries.
Description
The Movistar platform did not properly sanitize user inputs, accepting JavaScript code and reflecting it back to the user. This allowed attackers to create malicious URLs that execute arbitrary scripts in the victims' browsers. The vulnerable parameters were xxxtipouserxxx, xxxuserxxx, and xxxpasswordxxx via the GET method on the login servlet.
Impacto empresarial
If the user has an active session with their Movistar account at the time of the attack, their current cookies could be captured by the attacker.
Sistemas afectados
www.movistar.es (login servlet /sr/sso/pub/servlet/login)
Solución
Movistar confirmed the remediation on 08/29/2018.
Calendario de divulgación
References
The information contained within this advisory is supplied 'as-is' with no warranties or guarantees of fitness for use or otherwise. Internet Security Auditors accepts no responsibility for any damage caused by the use or misuse of this information.
Company based in Spain and Colombia, specializing in web application auditing, network security, penetration testing, and compliance implementation and assessment. Our clients include some of the largest finance, telecommunications, insurance, and ICT companies. A vendor-independent provider with deep expertise since 2001. Our R&D efforts include vulnerability research, collaboration on open security projects, whitepapers, and participation in industry events.
Would you like us to review your product?
Contact usDo you need a security audit?
Tell us about your situation and our team will get in touch with you to provide guidance or schedule a technical call.
Request information
Our offices
Transversal 22 # 98-82, Porta 100 Building, Office 1003
110221 Bogotá (Colombia)