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      • High Risk Findings
        • Anyone Can Pass Any Proposal
        • Arithmetic Rounding
        • Can Vote Multiple Times By Transferring NFT In Same Block As Proposal
        • Never Ending Proposal
        • Reusing Signatures
        • Signature Verification Can Be Bypass With Zero Address
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  • T.I.L.
    • 16 09 22
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  • Summary:
  • Mitigation:
  • TAGS: #sig
  1. Smart Contracts Security
  2. Code 4 Rena
  3. High Risk Findings

Reusing Signatures

Submitted by (11) sseefried, also found by 0xA5DF, Bahurum, bin2chen, byndooa, cccz, GalloDaSballo, hyh, kankodu, Lambda, and minhquanym

PreviousNever Ending ProposalNextSignature Verification Can Be Bypass With Zero Address

Last updated 1 year ago

Summary:

Since there is no nonce in the data decoded at the beginning of function escrow, a builder can call the function multiple times reducing their debt as much as they wish.

Mitigation:

Modify function escrow to check this nonce and update it after the debt has been reduced.

TAGS: #sig

https://code4rena.com/reports/2022-08-rigor/#h-03-builder-can-call-communityescrow-again-to-reduce-debt-further-using-same-signatures
https://code4rena.com/reports/2022-08-rigor/#h-04-project-funds-can-be-drained-by-reusing-signatures-in-some-cases
https://code4rena.com/reports/2022-08-rigor/#m-13-in-projectsetcomplete-the-signature-can-be-reused-when-the-first-call-is-reverted-for-some-reason