Plonky2 is a SNARK implementation based on techniques from PLONK and FRI. Lookup tables, whose length is not divisible by 26 = floor(num_routed_wires / 3) always include the 0 -> 0 input-output pair. Thus a malicious prover can always prove that f(0) = 0 for any lookup table f (unless its length happens to be divisible by 26). The cause of problem is that the LookupTableGate-s are padded with zeros. A workaround from the user side is to extend the table (by repeating some entries) so that its length becomes divisible by 26. This vulnerability is fixed in 1.0.1.
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Thu, 30 Jan 2025 20:15:00 +0000
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Description | Plonky2 is a SNARK implementation based on techniques from PLONK and FRI. Lookup tables, whose length is not divisible by 26 = floor(num_routed_wires / 3) always include the 0 -> 0 input-output pair. Thus a malicious prover can always prove that f(0) = 0 for any lookup table f (unless its length happens to be divisible by 26). The cause of problem is that the LookupTableGate-s are padded with zeros. A workaround from the user side is to extend the table (by repeating some entries) so that its length becomes divisible by 26. This vulnerability is fixed in 1.0.1. | |
Title | Soundness issue with Plonky2 look up tables | |
Weaknesses | CWE-1240 | |
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cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2025-01-30T19:55:17.620Z
Reserved: 2025-01-23T17:11:35.838Z
Link: CVE-2025-24802
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Updated: 2025-01-30T19:55:11.982Z
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Status : Received
Published: 2025-01-30T20:15:51.010
Modified: 2025-01-30T20:15:51.010
Link: CVE-2025-24802
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