# sniffglue [![Build Status][travis-img]][travis] [![Crates.io][crates-img]][crates]
[travis-img]: https://travis-ci.org/kpcyrd/sniffglue.svg?branch=master
[travis]: https://travis-ci.org/kpcyrd/sniffglue
[crates-img]: https://img.shields.io/crates/v/sniffglue.svg
[crates]: https://crates.io/crates/sniffglue
sniffglue is a network sniffer written in rust. Network packets are parsed concurrently
using a thread pool to utilize all cpu cores. Project goals are that you can
run sniffglue securely on untrusted networks and that it must not crash
when processing packets. The output should be as useful as possible by default.
## Usage
sniffglue enp0s25
## Installation
Make sure you have libpcap and libseccomp installed,
Debian/Ubuntu: `libpcap-dev libseccomp-dev`,
Archlinux: `libpcap libseccomp`.
cargo install sniffglue
## Protocols
- [X] ethernet
- [X] ipv4
- [ ] ipv6
- [X] arp
- [X] tcp
- [X] udp
- [ ] icmp
- [X] http
- [X] tls
- [ ] pop3
- [ ] smtp
- [ ] imap
- [X] dns
- [X] dhcp
- [ ] 802.11
## Docker
You can build sniffglue as a docker image to debug container setups. The image
is currently about 11.1MB. It is recommended to push it to your own registry.
docker build -t sniffglue .
docker run -it --init --rm --net=host sniffglue eth0
## Security
To report a security issue please contact kpcyrd on ircs://irc.hackint.org.
### Seccomp
To ensure a compromised process doesn't compromise the system, sniffglue uses
seccomp to restrict the syscalls that can be used after the process started.
This is done in two stages, first at the very beginning (directly after
env\_logger initialized) and once after the sniffer has been setup, but before
packets are read from the network.
### Hardening
During the second stage, there's also some general hardening that is applied
before all unneeded syscalls are finally disabled. Those are system specific,
so a configuration file is read from `/etc/sniffglue.conf`. This config
file specifies an empty directory for `chroot` and an unprivileged account
in `user` that is used to drop root privileges.
### boxxy-rs
This project includes a small [boxxy-rs] based shell that can be used to
explore the sandbox at various stages during and after initialization.
cargo run --example boxxy
[boxxy-rs]: https://github.com/kpcyrd/boxxy-rs
### Reproducible builds
This project is tested using reprotest. Currently the following variations are
excluded:
- `-time` - needed because the crates.io cert expires in the future
You need rustup to be installed and the nightly toolchain needs to be
available. Don't forget to install the build dependencies.
ci/reprotest.sh
### Fuzzing
The packet processing of sniffglue can be fuzzed using [cargo-fuzz].
Everything you should need is provided in the `fuzz/` directory that is
distributed along with its source code. Please note that this program links
to libpcap which is not included in the current fuzzing configuration.
cargo fuzz run read_packet
[cargo-fuzz]: https://github.com/rust-fuzz/cargo-fuzz
## License
GPLv3+