Uploaded October 2019 | Updated September 2026, 2 days ago
The Rowhammer bug is an issue in most DRAM modules which allows software to cause bit flips in DRAM cells, consequently manipulating data. Although only considered a reliability issue by DRAM vendors, research has showed that a single bit flip can subvert the security of an entire computer system.
By Daniel Gruss + Michael Schwarz + Moritz Lipp
The Rowhammer bug is an issue in most DRAM modules which allows software to cause bit flips in DRAM cells, consequently manipulating data. Although only considered a reliability issue by DRAM vendors, research has showed that a single bit flip can subvert the security of an entire computer system.
By Daniel Gruss + Michael Schwarz + Moritz Lipp
![Black Hat USA 2018 - Mainframe [z/OS] Reverse Engineering and Exploit Development](https://i.ytimg.com/vi/opBLBYAR8tU/mqdefault.jpg "Black Hat USA 2018 - Mainframe [z/OS] Reverse Engineering and Exploit Development
Speak with any Fortune 500 running mainframe and theyll tell you two things: (1) without their mainframes theyd be out of business (2) they do not conduct any security research on them, let alone vulnerability scans. The most infuriating part is that mainframes are simply computers, theyre different from what youre used to, but that doesnt mean they cant be hacked. Previous talks about this topic have covered the platform from a high level, imploring you to do the basics. This talk continues this series of talks, given by others, around mainframe hacking. Previously covered topics included network penetration testing and privilege escalation. To complement those talks, this talk will expose attendees to the various tools that exist on the platform to help you do your own reverse engineering, followed by detailed steps on how to start your own exploit development. Attendees will learn what debuggers are available on the platform, such as dbx and ASMIDF, as well as the challenges youll have using them. After learning how to RE, attendees will then learn how to develop their own exploits and buffer overflows on the platform using C, assembler and JCL. A demo program will be used to teach all these items so people can follow along. Topics included in this discussion are APF authorization, bypassing RACF/ACEE, TSO, Unix System Services.")
