Researchers use Rowhammer bit flips to steal 2048-bit crypto key

guest · Jun 11, 2019

Researchers use Rowhammer bit flips to steal 2048-bit crypto key
RAMBleed side-channel attack works even when DRAM is protected by error-correcting code
June 11, 2019
https://arstechnica.com/information...hammer-bitflips-to-steal-2048-bit-crypto-key/

The Rowhammer exploit that lets unprivileged attackers corrupt or change data stored in vulnerable memory chips has evolved over the past four years to take on a range of malicious capabilities [...]
Now, researchers are unveiling a new attack that uses Rowhammer to extract cryptographic keys or other secrets stored in vulnerable DRAM modules.
A new side channel
RAMBleed takes Rowhammer in a new direction. Rather than using bit flips to alter sensitive data, the new technique exploits the hardware bug to extract sensitive data stored in memory regions that are off-limits to attackers
What’s more, the data extraction can work even when DRAM protected by error correcting code detects and reverses a malicious bit flip.

While RAMBleed represents a new threat that hardware and software engineers will be forced to protect against, it seems unlikely that exploits will be carried out in real-world attacks any time soon.
[...] RAMBleed was able to successfully read bits stored in ECC memory with a 73% accuracy at a rate of 0.64 bit per second.
Click to expand...

Log in or Sign up

Researchers use Rowhammer bit flips to steal 2048-bit crypto key

guest Guest

Log in or Sign up

Researchers use Rowhammer bit flips to steal 2048-bit crypto key

guest Guest

Useful Searches