CyberRota Analysis
AI-GeneratedThe vulnerability affects ZEBRA, a Zcash node implementation, where a flaw in the variable-base scalar multiplication gadget allows a malicious prover to create valid proofs for Orchard Actions without proper constraints. This could enable attackers to bypass critical integrity checks, potentially leading to unauthorized transactions. Organizations utilizing affected versions of ZEBRA should prioritize updating to the specified fixed versions to mitigate this critical risk.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad 5.0.0, halo2_gadgets 0.5.0, orchard 0.14.0, zcash_primitives 0.28.0, and zcashd 6.20.0, the variable-base scalar multiplication gadget in halo2_gadgets/src/ecc/chip/mul/incomplete.rs used assign_advice() for the base point without a copy constraint tying it to the actual base, allowing a malicious prover to produce a valid proof for an Orchard Action with an under-constrained base point and bypass the diversified-address-integrity check that binds pk_d, g_d, ivk, the nullifier (nf), and the spend validating key (ak) to the note being spent. This issue is fixed in zebrad 5.0.0, halo2_gadgets 0.5.0, orchard 0.14.0, zcash_primitives 0.28.0, and zcashd 6.20.0.