Offres de stage 2019

Comme chaque année, nous ouvrons plusieurs offres de stage sur des projets utilisés en interne par notre équipe. Si vous êtes intéressé(e) par l'une d'entre elles, merci de nous faire parvenir un message à apply@synacktiv.com.

ColdFusion CFMX_COMPAT lolcryption

A recent pentest involving ColdFusion led us to discover the fabulous and infamous encryption algorithm CFMX_COMPAT.

iOS12 Kernelcache Laundering

iOS 12 has been released for a few weeks now. New major iOS versions often mean new kernelcache and dyld_shared_cache file formats. iOS12 is no exception to the rule and comes with an other surprise: Pointer Authentication Code (PAC) for the new A12 chip. This blogpost shows you how to …

Hunting mobile devices endpoints - the RF and the Hard way

When conducting intrusion tests, knowledge of endpoints and exchanged data is mandatory to test targeted applications, devices, and remote servers. If the target provides an Android, or iPhone application, it is possible to extract some URLs, and with any luck some secrets by disassembling the application or/and capturing the generated network traffic. But when no Android nor iPhone applications are available, attackers need to be more creative, and use other tricks to get any interesting inputs/content/behavior. Moreover, secrets exchanged between a targeted device and its servers could be totally different from those exchanged between an application and its servers, as well as contacted URLs. Indeed, pentesters are in certain cases confronted to devices with hardcoded credentials, certificates, or any other information giving further access to intrude the system. In addition, the level of trust could be overestimated by vendors/constructors, who give more privileges to devices compared to basic users. So breaking into the device or/and directly intercepting its communication could be a real change during intrusion tests.

This article is about getting those information from IoT devices that use the mobile network to exchange data and commands. Different techniques will be introduced:

  • RF way: use of mobile data interception techniques;
  • Hard way: dump and analysis of a firmware.

To illustrate these attacks, examples will be based on a 3G intercom well deployed in France, which is powered with a PIC24FJ micro-controller.

2018 Summer Challenge Writeup

An old school RE challenge was published on August 07th and has been solved by several people. This blog post provides a detailed solution on how to solve this challenge followed by the winner write-up.

2018 summer challenge: MetroCross

Getting bored at the beach this summer? We have a small & old-school challenge for you!

Practical DMA attack on Windows 10

Among the various security assessments performed by Synacktiv, some involve attacking the security hardening of a laptop or workstation master image that will be massively deployed in an infrastructure. The purpose of this kind of security assessment is to give the client an overview of its level of maturity regarding security concerns and provide him with some recommendations in order to increase his level of security.

This post describes how Synacktiv defeated a workstation security measures by using a hardware approach.

Breaking namespace isolation with PF_RING before 7.0.0

Linux hardening and proper isolation using containerization can be tricky especially when performance is critical.

We recently helped a client to design a secure network appliance that involve sniffing network traffic. This device has high security and performance constraints.

This post is a feedback on the unlikely integration of fast sniffers with linux containers.

netdata apps.plugin security fixes

Synacktiv met netdata in the wild in the last few months. This blog post aims at telling the story of a vulnerability which was first forgotten 1 year ago and then partially fixed. On a standard setup, the vulnerability can be exploited by gid netdata to read arbitrary files owned by root. On a weak setup (as seen in the wild by Synacktiv), the vulnerability can be exploited by all users.

Offres d'emploi 2018

Plusieurs postes sont ouverts dans notre équipe : pentester, reverser, dev et sysadmin.

Pour chacune de ces annonces, merci d'envoyer votre demande à apply@synacktiv.com en indiquant l'offre concernée dans le sujet de votre mail.

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