This blog post presents our fuzzer for the Bluetooth Low Energy GATT layer and the related vulnerabilities found with it.

The internship season is back at Quarkslab! Our internship topics cover a wide range of our expertise and aim at tackling new challenges, namely:

Techniques for analyzing binaries or kernel modules that may try to monitor themselves, similar to malware behavior. To avoid detection during analysis, one approach is to use an hypervisor like QEMU to conduct research within a virtualized environment. Although the target may realize it is running in a virtual machine, this usually does not trigger suspicion, as hypervisors are common in modern environments. This method allows for detailed analysis while maintaining stealth, making it effective in scenarios where the target must not detect the monitoring.

We discovered several vulnerabilities impacting the boot chain of several Samsung devices. Chained together, they allow us to execute code in the bootloader, get root access on Android with persistency, and finally leak anything from the Secure World's memory including the Android Keystore keys.

The following article explains how during an audit we took a look at Apache Superset and found bypasses (by reading the PostgreSQL documentation) for the security measures implemented.

The following article explains how during a Purple Team engagement we were able to identify a vulnerability in Microsoft Teams on macOS allowing us to access a user's camera and microphone.

Following a brief introduction to differential fuzzing, this blog post reviews the leading tools that leverage it for testing cryptographic primitives. In the second half, we present a method for creating a differential fuzzer along with the results we obtained.

In this blog post we present crypto-condor, an open-source test suite for compliance testing of implementations of cryptographic primitives.

The following blogpost explains how during a Red Team engagement we were able to identify several vulnerabilities including Remote Code Executions in the latest version of Chamilo.

Quarkslab was mandated by the Open Source Technology Improvement Fund, Inc. to proceed with the security assessment of the Operator Fabric project. The purpose of this assessment is to deliver an expert opinion of the security level reached by the application at a specific moment.