radius2 - fast symbolic execution with r2

radius2 is symbolic execution and taint analysis framework using radare2 and its ESIL intermediate representation. It is essentially a rust rewrite of ESILSolve with some architectural improvements. It uses boolector as the SMT solver rather than z3. It executes about 1000x faster than ESILSolve on average. radius2 gains additional speed over other rust based symbex tools by using u64 primitives for concrete values instead of constant valued bitvectors which incur significant overhead for all operations.

Building

Install radare2 with git clone https://github.com/radareorg/radare2.git radare2/sys/install.sh

Include radius2 as a dependency using radius2 = "1.0.12" or build locally with cargo build --release

Supported Architectures

• x86
• amd64
• ARM
• AArch64

"Supported" Architectures

radius2 also "supports" MIPS, PowerPC, and Gameboy but they are almost entirely untested.

radius2 can execute Dalvik bytecode only involving static methods and variables.

Finally there is also a varying amount of support for 6502, 8051, AVR, h8300, PIC, RISCV, SH-4, V810, V850, Xtensa.

Also PCode can be translated to ESIL with r2ghidra with pdgp (currently broken) so potentially more archs could be supported that way.

Example

```rust use radius2::Radius;

fn main() { let mut radius = Radius::new("tests/r100"); let mut state = radius.callstate(0x004006fd); let addr: u64 = 0x100000; let flagval = state.symbolicvalue("flag", 12*8); state.memory.writevalue(addr, &flagval, 12); state.registers.set("rdi", state.concretevalue(addr, 64));

radius.breakpoint(0x004007a1);
radius.avoid(&[0x00400790]);
let mut new_state = radius.run(state, 1).unwrap();
let flag = new_state.evaluate_string(&flag_val).unwrap();
println!("FLAG: {}", flag);
assert_eq!(flag, "Code_Talkers");

} ```

radius2 CLI tool

radius2 can also be installed from crates.io and easily included in packages. radius2 also has a CLI tool that can be installed with cargo install radius2

``` radius2 1.0.12 Austin Emmitt (@alkalinesec) aemmitt@nowsecure.com A symbolic execution tool using r2 and boolector

                         ooo  o88                           ooooooo

oo oooooo ooooooo ooooo888 oooo oooo oooo ooooooo88 o88 888 888 888 ooooo888 888 888 888 888 888 888ooooooo o888
888 888 888 888 888 888 888 888 888 o888
o888o 88ooo88 8o 88ooo888o o888o 888o88 8o 88oooooo88 o8888oooo88

USAGE: radius2 [FLAGS] [OPTIONS] --path

FLAGS: -V, --color Use color output --crash Execution stops on invalid memory access -h, --help Prints help information -j, --json Output JSON -z, --lazy Evaluate symbolic PC values lazily --no-sims Do not simulate imports --plugins Load r2 plugins -P, --profile Get performance and runtime information -M, --selfmodify Allow selfmodifying code (slower) -2, --stderr Show stderr output -0, --stdin Use stdin for target program -1, --stdout Show stdout output --strict Panic on invalid instructions and ESIL --version Prints version information -v, --verbose Show verbose / debugging output

OPTIONS: -a, --address