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eurecom-s3 / x-ray-tls

Generic and transparent TLS inspection for local programs
https://dl.acm.org/doi/10.1145/3634737.3637654
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network-analysis tls

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X-Ray-TLS

Project Status: Concept – Minimal or no implementation has been done yet, or the repository is only intended to be a limited example, demo, or proof-of-concept.

E2E Tests

X-Ray-TLS allows to inspect TLS-encrypted traffic made from local programs by extracting TLS session keys from process memory in a generic and transparent way.

If using this work, please cite our paper:

@inproceedings{10.1145/3634737.3637654,
  author = {Moriconi, Florent and Levillain, Olivier and Francillon, Aur\'{e}lien and Troncy, Raphael},
  title = {X-Ray-TLS: Transparent Decryption of TLS Sessions by Extracting Session Keys from Memory},
  year = {2024},
  isbn = {9798400704826},
  publisher = {Association for Computing Machinery},
  address = {New York, NY, USA},
  url = {https://doi.org/10.1145/3634737.3637654},
  doi = {10.1145/3634737.3637654},
  booktitle = {Proceedings of the 19th ACM Asia Conference on Computer and Communications Security},
  pages = {35–48},
  numpages = {14},
  keywords = {TLS, transport layer security, TLS decryption, memory analysis},
  location = {Singapore, Singapore},
  series = {ASIA CCS '24}
}

Properties

Getting started

Run with Docker

Running TLS traffic analyzer in docker is supported on the following host OS:

# Build the image with the same base OS as your host OS
# WARNING: you must recompile the image on host kernel updates
# Set BASE_IMAGE=... to one of the supported host OS (see above)
docker build -t tls-traffic-analyzer:latest --no-cache --build-arg BASE_IMAGE=ubuntu:20.04 -f docker/Dockerfile .

# Get interface of default route (or set the interface you want to listen on)
INTERFACE=$(ip -4 route | awk '/default/{print $5}')

# Run without saving traffic dumps for curl commands
# Add -vv for DEBUG
docker run --privileged -it --rm --network host --pid host tls-traffic-analyzer:latest -i $INTERFACE --commands curl

# Run with saving traffic dumps for curl commands
docker run --privileged -it --rm -v $(pwd)/dumps:/dumps --network host --pid host tls-traffic-analyzer:latest -i $INTERFACE -o /dumps --chown-traffic-dumps $UID --commands curl

Run without Docker

Follow instructions in docker/Dockerfile to setup required environment.

The program must be run as root

sudo python3 src/main.py

Run traffic analysis on applications running in a Docker container

Applications executed in a Docker container run in a different namespace. By providing --container parameter (container name or id), this tool will bind to the network namespace of the target container (but not other namespaces, like mount namespace). It means traffic dumps will still be saved on the host filesystem. In this context, --interface parameter should be adapted to match interface name in the docker container, often eth0. Furthermore, if running the tool from a Docker container, you should give access to the host Docker daemon using a bind mount like below:

docker run --privileged -it --rm -v $(pwd)/dumps:/dumps -v /var/run/docker.sock:/var/run/docker.sock --network host --pid host tls-traffic-analyzer:latest -o /dumps --chown-traffic-dumps $UID --container my_container -vv

Running on all applications on the host system

Doing traffic analysis on all applications running on the host system is not probably not what you want. Depending on the configuration, this tool may freeze applications for short periods of time and decrypt TLS sessions that you would not expect to be decrypted and stored on disk. Therefore, it is strongly encouraged to use --commands to limit the analysis to given commands. If you know what you are doing, running on all commands on the host can be enabled using the environment variable ALLOW_ALL_COMMANDS_ON_HOST=true

Environment variables

Troubleshoot

sudo python may refer to python2! Only Python3 is supported.

Resources