NRDAX-T0122 - Integer Signedness Index OOB Crash

Fault termination · Consensus ingest · absent invariant · active · first seen 2026-07-07

provenance: Reproduced in NullRabbit's attack-reproduction pipeline

mechanism

CVE-2021-3121 (gogoproto 'skippy peanut butter'): unknown length-delimited field with a negative-length varint → pre-1.3.2 skip code does iNdEx+=length with no length<0 check → index out of bounds → panic in the cosmos-sdk tx decoder, pre-signature-validation

live exposure

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

instances (3)

chain	primitive	fidelity	origin	reproducer (bundle)	source
conflux	conflux_getblocktxn_index_overflow	lab	reverse-engineered-cve	conflux_getblocktxn_index_overflow	github.com ↗
cosmos	cosmos_gogoproto_skippy	lab	reverse-engineered-cve	cosmos_gogoproto_skippy	CVE-2021-3121 ↗
ethereum	geth_les_skip_negative	lab	reverse-engineered-cve	geth_les_skip_negative	CVE-2018-12018 ↗

related (Fault termination)

NRDAX-T0001 - Addr Message Counter Overflow Crash active NRDAX-T0005 - Array Deserialization Memcpy Corruption active NRDAX-T0013 - Bloom Filter Divide-By-Zero Crash active NRDAX-T0024 - Compact Block FillBlock Duplicate Crash active NRDAX-T0056 - Duplicate Input Validation-Bypass Crash active NRDAX-T0101 - Handshake Crypto Validation Bypass Crash active NRDAX-T0120 - Integer-Overflow Panic Control Message active NRDAX-T0129 - Invalid Curve Point Panic active

cite

https://nrdax.com/techniques/NRDAX-T0122

plain

NRDAX Registry. Technique NRDAX-T0122.

bibtex

@misc{nrdax_NRDAX_T0122,
  title = {Integer Signedness Index OOB Crash (NRDAX-T0122)},
  howpublished = {NRDAX Registry},
  url = {https://nrdax.com/techniques/NRDAX-T0122},
}

json (csl)

{
  "id": "nrdax-NRDAX-T0122",
  "type": "dataset",
  "title": "Integer Signedness Index OOB Crash (NRDAX-T0122)",
  "URL": "https://nrdax.com/techniques/NRDAX-T0122",
  "publisher": "NRDAX Registry"
}

badge

[![NRDAX-T0122 in the NRDAX registry](https://nrdax.com/badge/NRDAX-T0122.svg)](https://nrdax.com/techniques/NRDAX-T0122-integer-signedness-index-oob-crash)

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-T0122

Cite it (BibTeX)

nrdax cite NRDAX-T0122 --format bibtex

CLI guide → GitHub ↗