CSRF and DNS-rebinding to RCE in Selenium Server (Grid)
Published:
Vulnerabilities in found on the WebDriver endpoints of Selenium Server (Grid).
DNS rebinding vulnerability to RCE in GeckoDriver
Published:
A DNS rebinding vulnerability I found in GeckoDriver which could be used to execute arbitrary shell commands. This is bug #1652612 and CVE-2021-4138.
Introduction to TLS v1.2
Published:
Some notes about how TLS v1.2 (Transport Layer Security) works. The goal explain what is going on in a network traffic dump, the role of the different TLS extensions, the impact of the different cipher suites on security, etc. It includes several diagrams and many references.
Introduction to the Diffie-Hellman key exchange
Published:
The Diffie-Hellman (DH) key exchange (and variants thereof) is widely used in many protocols (such as TLS, SSH, IKE (IPSec), Signal, etc.) to bootstrap some symmetric key material which may then be used to secure communication channel between two parties. This introduction focuses on the different ways the DH key exchange is used in practice in several protocols (especially TLS) and the impact of these different approaches on the security. This is intended as a prelude for the upcoming next episodes about how TLS works.
What is in my COVID-19 vaccination certificate?
Published:
Manually inspecting the content of a French COVID-19 vaccination certificate QR code. The main intent is to show with a concrete example which data is actually included in the certificate.
Cross-origin/same-site request forgery to RCE in chromedriver
Published:
I found a cross-origin/same-site request forgery vulnerability in chromedriver. It was rejected (won't fix) because it is only possible to trigger this from the cross-origin/same-site and not cross-site. In practice, it means it is really only possible to trigger this from another localhost-bound web application.
CSRF to RCE in GeckoDriver
Published:
A Cross-Site Request Forgery (CSRF) vulnerability I found in GeckoDriver which could be used to execute arbitrary shell commands. CVE-2020-15660 has been assigned to this vulnerability. This was fixed by GeckoDriver v0.27.0 in 2020-07-27. This is bug #1648964.
DNS rebinding vulnerability in GUPnP
Published:
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.
DNS rebinding vulnerability in pupnp and npupnp
Published:
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.
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.
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