DNS rebinding explained
Published:
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.
Firefox DoH DNS rebinding protection bypass using IPv4-mapped addresses
Published:
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.
Introduction to UPnP
Published:
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.
DNS rebinding and CSRF vulnerabilites on Samsung TV DIAL implementation
Published:
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 visualization of a given video in the applications.
DNS rebinding vulnerability in Samsung SmartTV UPnP
Published:
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.
Disable certificate verification on Android with Frida
Published:
Some notes about how to write a Frida script with the (somewhat classic) example of disabling certificate verification for TLS communications on Android applications.
DNS rebinding vulnerabilities in Freebox
Published:
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.
Remote code execution via cross site request forgery in InternetCube and YunoHost
Published:
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.
More example of argument and shell command injections in browser invocation
Published:
In the previous episode, I talked about some argument and shell command injections vulnerabilities through URIs passed to browsers. Here I am evaluating some other CVEs which were registered at the same time (not by me).
Argument and shell command injections in browser invocation
Published:
I found an argument injection vulnerability related to the handling of the BROWSER environment variable in sensible-browser. This lead me (and others) to a few other arguments and shell command injection vulnerabilities in BROWSER processing and browser invocation in general.
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