NRDAX-T0328 - Unbounded Request Body Memory Exhaustion

Memory amplification · RPC and public API · no bound · active · first seen 2026-07-07

provenance: Reproduced in NullRabbit's attack-reproduction pipeline

mechanism

PRYSM_ATTESTER_SLASHING_PUBKEY_BURN (S4): POST /eth/v1/beacon/pool/attester_slashings_v2 decodes one AttesterSlashingElectra whose attesting_indices vector is capped only at the structural MaxValidatorsPerCommittee*MaxCommitteesPerSlot = 131,072 (attestation.go:259; no body cap, no rate-limit) then runs a per-index pubkey-deser/subgroup-check loop before the pairing short-circuits → 3.06 s/req cold-cache measured. NullRabbit-original on prysm HEAD; 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.

research

In-depth write-ups of this attack on nullrabbit.ai.

Cardano cardano-submit-api: unbounded request body → memory exhaustion ↗

instances (7)

chain	primitive	fidelity	origin	reproducer (bundle)	source
cardano	cardano_submit_api_body_memory_pin	lab	NullRabbit Labs	cardano_submit_api_body_memory_pin	github.com ↗
ethereum	prysm_attester_slashing_pubkey_burn	lab	NullRabbit Labs	prysm_attester_slashing_pubkey_burn	-
ethereum	prysm_bls_exec_change_decode_burn	lab	NullRabbit Labs	prysm_bls_exec_change_decode_burn	-
ethereum	prysm_bls_pool_decode_burn	lab	NullRabbit Labs	prysm_bls_pool_decode_burn	-
ethereum	reth_pooledtx_decode_memory_amp	lab	NullRabbit Labs	reth_pooledtx_decode_memory_amp	github.com ↗
ic	ic_orchestrator_cup_body_bomb	lab	NullRabbit Labs	ic_orchestrator_cup_body_bomb	-
monero	monero_wallet_rpc_body_size_dos	lab	reverse-engineered-cve	monero_wallet_rpc_body_size_dos	-

references

vendor-advisory: GHPR-monero-project-monero-10139

related (Memory amplification)

NRDAX-T0023 - Coalesced Packet Buffer Leak active NRDAX-T0025 - Compact Block Size Integer Overflow active NRDAX-T0038 - Count Underflow Header Serving Amplification active NRDAX-T0042 - Crypto Frame Reassembly Buffer Exhaustion active NRDAX-T0046 - Decompression Bomb Resource Exhaustion active NRDAX-T0059 - Duplicate Transport Parameter Memory Leak active NRDAX-T0061 - Duplicate Tx Mempool Index Desync active NRDAX-T0071 - Ethash Verification Memory Exhaustion active

cite

https://nrdax.com/techniques/NRDAX-T0328

plain

NRDAX Registry. Technique NRDAX-T0328.

bibtex

@misc{nrdax_NRDAX_T0328,
  title = {Unbounded Request Body Memory Exhaustion (NRDAX-T0328)},
  howpublished = {NRDAX Registry},
  url = {https://nrdax.com/techniques/NRDAX-T0328},
}

json (csl)

{
  "id": "nrdax-NRDAX-T0328",
  "type": "dataset",
  "title": "Unbounded Request Body Memory Exhaustion (NRDAX-T0328)",
  "URL": "https://nrdax.com/techniques/NRDAX-T0328",
  "publisher": "NRDAX Registry"
}

badge

[![NRDAX-T0328 in the NRDAX registry](https://nrdax.com/badge/NRDAX-T0328.svg)](https://nrdax.com/techniques/NRDAX-T0328-unbounded-request-body-memory-exhaustion)

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-T0328

Cite it (BibTeX)

nrdax cite NRDAX-T0328 --format bibtex

CLI guide → GitHub ↗