NRDAX-T0041 - Cross-Chain Peer Pool Pollution

Connection exhaustion · P2P and gossip · no bound · active · first seen 2026-07-08

provenance: Reproduced in NullRabbit's attack-reproduction pipeline

mechanism

Alien Attack (SlowMist 'peer-pool pollution'): a same-family but DIFFERENT-chain peer completes the chain-agnostic RLPx ECIES handshake + devp2p Hello and is admitted to the eth handshake; the chain check (networkID/genesis) happens only at eth Status, AFTER the full handshake - so an alien (Ethereum mainnet identity vs the target's privnet) forces geth to spend the whole ECIES+Hello handshake before disconnecting on the mismatch. Flooding alien handshakes wastes handshake CPU + occupies connection slots (peer-pool pollution). Class disclosed by SlowMist (first found the Alien Attack); no CVE.

live exposure

No exposure data. Slashr ↗ has no risk signal mapped to this technique yet — absence of data is not absence of exposure.

instances (1)

chain	primitive	fidelity	origin	reproducer (bundle)	source
ethereum	geth_alien_peer_pool_pollution	lab	reverse-engineered-cve	geth_alien_peer_pool_pollution	github.com ↗

references

vendor-advisory: SLOWMIST-ALIEN-ATTACK

related (Connection exhaustion)

NRDAX-T0064 - Endpoint Concurrency Cap Exhaustion active NRDAX-T0099 - Half-Open Handshake Slowloris active NRDAX-T0214 - Protocol Message Flood Unbounded Goroutine active NRDAX-T0225 - QUIC Control Frame Flood active NRDAX-T0246 - Rate-Limit Key Confusion active NRDAX-T0261 - RPC Request Flood active NRDAX-T0291 - Subscription Permit Exhaustion active NRDAX-T0320 - Unbounded Connection Flood active

cite

https://nrdax.com/techniques/NRDAX-T0041

plain

NRDAX Registry. Technique NRDAX-T0041.

bibtex

@misc{nrdax_NRDAX_T0041,
  title = {Cross-Chain Peer Pool Pollution (NRDAX-T0041)},
  howpublished = {NRDAX Registry},
  url = {https://nrdax.com/techniques/NRDAX-T0041},
}

json (csl)

{
  "id": "nrdax-NRDAX-T0041",
  "type": "dataset",
  "title": "Cross-Chain Peer Pool Pollution (NRDAX-T0041)",
  "URL": "https://nrdax.com/techniques/NRDAX-T0041",
  "publisher": "NRDAX Registry"
}

badge

[![NRDAX-T0041 in the NRDAX registry](https://nrdax.com/badge/NRDAX-T0041.svg)](https://nrdax.com/techniques/NRDAX-T0041-cross-chain-peer-pool-pollution)

use from the CLI

Retrieve or cite this technique from a script or the terminal with the NRDAX Python library & CLI.

Retrieve this technique

nrdax get NRDAX-T0041

Cite it (BibTeX)

nrdax cite NRDAX-T0041 --format bibtex

CLI guide → GitHub ↗