02/03/2021In February 2021 Samsung made some changes in one of its low level drivers : the Digital Signal Processor (DSP) Linux driver. They removed one interesting feature : the ability for untrusted apps to load a custom DSP firmware of their choice. The driver is present on Galaxy S20 and Galaxy S21 Exynos based phones (and probably on Galaxy Note 20 too). This article presents how to use this feature to boot the DSP on a custom firmware, and how to use this custom firmware along with bugs in the DSP driver to gain ker...
01/03/2021A team of Synacktiv security experts participated to the last edition of Pwn2Own by submitting a LAN-side exploit against the TP-Link AC1750. This blogpost aims to describe the process of discovery and exploitation of this vulnerability, including the presentation of exploitation code.
11/02/2021Exploiting CVE-2021-25770, a Server-Side Template Injection that leads to remote code execution using a known Freemarker sandbox escape.
10/02/2021Two weeks ago, CVE-2021-1782 was fixed by Apple. If the patch for this kernel vulnerability is simple, a way to exploit the bug was still to be discovered. This blog post aims to explain how an exploit is possible while providing a PoC.
10/12/2020Despite an active console hacking community, only few public PlayStation 4 exploits have been released. In this post, we will give a walk-through on the exploitation of a 0-day WebKit vulnerability on 6.xx firmware.
01/12/2020Back in the beginning of November, Project Zero announced that Apple has patched a full chain of vulnerabilities that were actively exploited in the wild. This chain consists in 3 vulnerabilities: a userland RCE in FontParser as well as a memory leak and a type confusion in the kernel. In this blogpost, we will describe how we identified and exploited the kernel memory leak.
25/11/2020In this blogpost, we will find what happens when two security researchers find a random printer and then manage to find vulnerabilities in it.
05/11/2020In order to better protect its users, NBS System has asked Synacktiv to perform a source code review of Naxsi, a famous open source Web Application Firewall (WAF). During this audit, Synacktiv discovered several vulnerabilities that could allow bypassing the application of the filtering rules. This short blog post will present the most critical vulnerabilities and how they were fixed by NBS System. The fixes have been published on version 1.1a quickly after they were reported: https://github.com/nbs-system/naxsi/releas...
03/09/2020As you may already know, we collaborated with Zero Day Initiative to disclose a vulnerability in Ubuntu's ppp package. This vulnerability has been assigned the identifiers ZDI-CAN-11504 / CVE-2020-15704.
28/07/2020ZDI announced last year a new entry in it's yearly contest "Pwn2Own". After the Vancouver edition focused on Desktop software and Tokyo specialized in smartphones, there is now a third location in Miami dedicated to industrial software also known as ICS or SCADA.