A family of processor architectures used in many embedded applications, network and other appliances, and almost all smartphones.

learn more… | top users | synonyms

3
votes
0answers
196 views

ROP Programming/Exploitation on ARM - Gadget chain

Unfortunately, I cannot find this gadget in my libc.so. How can we reprogram this using different instructions: pop {r0, r1, r2, r3, pc} Which instructions will achieve the same? What gadgets I ...
4
votes
1answer
102 views

Building a project on ARM Cortex-M, anything I can do to keep IP secure? Dealing with Chinese knockoffs and sick of it

Chinese have decided to ripoff a PIC product I make. Switching to ARM for other reasons anyhow, mainly that Microchip is a joke, either STM32 or NXP LPC, exact chip is open still. There are sites ...
4
votes
1answer
2k views

Diffie Hellman parameters still calculating after 24 hours

I have a fresh install of Arch Linux on a RaspberryPi model B. I'm setting up OpenVPN and using easy-rsa with OpenSSL 1.0.2d to generate initial keys and certificates. All went fine until I ran ...
2
votes
1answer
325 views

Loading code securely in the Trusted Execution Environment (ARM)

I am reading up on TEE in ARM. I am looking for pointers for the following questions: How does the TEE load code from the OS securely and guarantee that its not malicious code? I am guessing the ...
27
votes
4answers
4k views

A tiny version of wget (51 bytes?)

On this ISC article on DVR compromise the author talks about the compromise of an embedded system. In particular, the attacker executes a series of echo commands on the remote host, and: This DVR ...
2
votes
1answer
222 views

ARM TrustZone with Normal and Secure World

I am new to Security testing and I am working on a 64-bit ARM server. We are using ARM TrustZone technology. Is it possible for me to check if I am in the Secure world or the Normal world? How do I ...
6
votes
2answers
1k views

Does the ARM TrustZone technology support sealing a private key under a code hash?

One of the extremely valuable functions of a Trusted Platform Module (TPM) chip is its ability to seal a private key under the hash of the code that will use it. This means that one can create a ...
3
votes
1answer
207 views

What are security implications of enabling access to performance counters on ARM Cortex A9?

On an ARM Cortex A9 core, privileged instructions have to be executed so that unprivileged code can use performance counters. For instance with this GCC inline code, which would have to be run in a ...
5
votes
1answer
855 views

ROP Exploitation on ARM

I was wondering about since, Ret2Libc attack doesn't works on ARM, and we have to rely on ROP for that. How different is ROP on ARM from the x86 architecture. Are there any tools, such as mona.py ...
2
votes
3answers
2k views

Stack Overflow on ARM : Null Bytes Issue

I am trying to follow the research paper by Tiger Security for ARM Exploitation : Link For the simple stack overflow exploitation, the code is : #include <stdio.h> #include <string.h> ...
5
votes
1answer
481 views

Hardware enforced DEP on different CPUs

Are there any differences how hardware DEP is implemented on CPUs from different manufacturers (Intel, AMD, nVidia, Texas,...)? Are there any significant differences how hardware DEP works on x86 ...