GUPnP, a GNOME library for Universal Plug and Play (UPnP), was vulnerable to DNS rebinding attacks. This is CVE-2021-33516 and GUPnP issue #24. This was fixed in GUPnP 1.0.7 and GUPnP 1.2.5.

I found that pupnp was vulnerable to DNS rebinding attacks. npupnp, a fork a pupnp, was impacted as well. This is demonstrated using Gerbera a UPnP MediaServer.

A quick summary about how DNS rebinding attacks work. The main motivation for this post is to have a diagram to show when explaining DNS-rebinding attacks.

I found that the filtering of private IPv4 addresses in the DNS-over-HTTPS (DoH) implementation of Firefox could by bypassed. This is CVE-2020-26961 and Mozilla bug 1672528. It has been fixed in Firefox 83, Firefox ESR 78.5 and Thunderbird 78.5.

This post gives simple explanations of how UPnP (Universal Plug-and-Play) works, especially with the goal of testing the security devices such as routers, smart TVs, etc.

I found a DNS rebinding vulnerability as well as a Cross Site Request Forgery (CSRF) vulnerability on the DIAL (Discovery And Launch) implementation of the Samsung TV UE40F6320 (v1.0), from 2011. This can be used to open any installed application (eg. Netflix and Youtube) and force the vizualisation of a given video in the applications.

I found a DNS rebinding vulnerability on the Universal Plug-and-Play (UPnP) interface of the Samsung TV UE40F6320 (v1.0), from 2011. This could be used, for example, to change the channel, to know which channel is currently used or open the builtin browser to any URI.

Some notes about how to write a Frida script with the (somewhat classic) example of disabling certificate verification for TLS communications on Android applications.

I found some DNS rebinding vulnerabilities in Freebox devices (CVE-2020-24374, CVE-2020-24375, CVE-2020-24376, CVE-2020-24377) as well as a Cross Site Request Forgery (CSRF) vulnerability (CVE-2020-24373) These vulnerabilities were fixed in 2020-08-05.

How I found remote code execution vulnerabilities via Cross Site Request Forgery (CSRF) on the administration interfaces of InternetCube applications and of the YunoHost administration interface which could have been used to execute arbitrary code as root. These vulnerabilities were fixed in YunoHost 3.3, OpenVPN Client app 1.3.0. and YunoHost 3.4.