NRDAX-T0198 - Peer List Sort CPU Amplification

compute_amp · active · first seen 2026-07-07

provenance: Reproduced in NullRabbit's attack-reproduction pipeline

mechanism

Cardano PeerSharing MsgShareRequest O(N log N) sort CPU amp: sortBy+hashWithSalt over the ~3000-peer known set per request (~170 us), no idle timeout (Codec.hs:160), no per-peer rate limit. One post-h

instances (1)

chain	primitive	fidelity	origin	reproducer (bundle)	source
cardano	cardano_peershare_sort_cpu	lab	NullRabbit Labs	cardano_peershare_sort_cpu	github.com ↗

related (compute_amp)

NRDAX-T0005 - Array Deserialization Memcpy Corruption active NRDAX-T0006 - Async Runtime Blocking VM Execution active NRDAX-T0013 - Bloom Filter Divide-By-Zero Crash active NRDAX-T0076 - Expensive Debug RPC Compute Amplification active NRDAX-T0101 - Handshake Crypto Validation Bypass Crash active NRDAX-T0122 - Integer Signedness Index OOB Crash active NRDAX-T0129 - Invalid Curve Point Panic active NRDAX-T0139 - Legacy Sighash Quadratic CPU Blowup active

cite

https://nrdax.com/techniques/NRDAX-T0198

plain

NRDAX Registry. Technique NRDAX-T0198.

bibtex

@misc{nrdax_NRDAX_T0198,
  title = {Peer List Sort CPU Amplification (NRDAX-T0198)},
  howpublished = {NRDAX Registry},
  url = {https://nrdax.com/techniques/NRDAX-T0198},
}

json (csl)

{
  "id": "nrdax-NRDAX-T0198",
  "type": "dataset",
  "title": "Peer List Sort CPU Amplification (NRDAX-T0198)",
  "URL": "https://nrdax.com/techniques/NRDAX-T0198",
  "publisher": "NRDAX Registry"
}