Presented at
DEF CON 30 (2022),
Aug. 14, 2022, 2 p.m.
(45 minutes)
Solana is a blockchain with a $37 billion dollar market cap with the
security of that chain relying on the security of the smart contracts
on the chain - and we found very little research on the actual
execution environment of those contracts. In contrast to Ethereum,
where contracts are mostly written in Solidity and then compiled to
the Ethereum Virtual Machine, Solana uses a different approach: Solana
contracts can be written in C, Rust, and C++, and are compiled to
eBPF. Underneath the hood, Solana uses rBPF: A Rust BPF implementation
with a just-in-time compiler. Given the security history of eBPF in
the Linux kernel, and the lack of previous public, low-level Solana
research, we decided to dig deeper: We built Solana
reverse-engineering tooling and fuzzing harnesses as we slowly dug our
way into the JIT - eventually discovering multiple out-of-bounds
vulnerabilities.
Presenters:
-
Thomas Roth / stacksmashing
as Thomas Roth
Thomas Roth is a security researcher from Germany. In the past he has published research on topics like TrustZone, fault injection, payment terminals, cryptocurrency-wallets and embedded security.
Links:
Similar Presentations: