7 results · Clear filters · Feed
-
High 7.4
Zebra before 4.4.0 Consensus Split via SIGHASH_SINGLE Missing-Output Handling
Zebra before 4.4.0 contains a consensus divergence vulnerability in V5 transparent signature verification, computing a ZIP-244 digest for SIGHASH_SINGLE inputs lacking corresponding outputs instead of failing. Attackers can craft V5 transactions with fewer ou…
-
High 7.4
Zebra 4.4.0 Consensus Divergence via V5 SIGHASH_SINGLE Without Output
Zebra zebrad 4.4.0 and zebra-script 6.0.0 fail to enforce a ZIP-244 consensus rule, accepting V5 transparent inputs signed with SIGHASH_SINGLE that lack a corresponding output. Attackers can broadcast crafted V5 transactions with more inputs than outputs that…
-
High 7.5
ZEBRA: IPv4-Mapped Mempool Misbehavior Update Aborts Zebra Address Book
ZEBRA is a Zcash node written entirely in Rust. Prior to 4.5.0, an unauthenticated IPv4 peer can deterministically terminate a synced Zebra node using the default Linux dual-stack listener configuration. The handshake path canonicalized an IPv4-mapped IPv6 Pe…
-
High 8.7
ZEBRA: Block suppression via NU5 same-header body poisoning of sent-hash cache
ZEBRA is a Zcash node written entirely in Rust. Prior to 4.5.0, a remote unauthenticated P2P peer can stall a Zebra node by racing an invalid block body against the valid canonical body for the same block header hash. ZIP-244 permits the attacker to mutate co…
-
High 8.7
ZEBRA: Permanent Block Discovery Halt via Gossip Queue Saturation and Syncer Poisoning
ZEBRA is a Zcash node written entirely in Rust. Prior to version 4.4.0, a composite denial-of-service vulnerability in Zebra's block discovery pipeline allows an unauthenticated remote attacker to permanently halt all new block discovery on a targeted node. T…
-
High 7.2
Zebra: Cached Mempool Verification Bypasses Consensus Rules for Ahead-of-Tip Blocks
ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.1 and zebra-consensus version 5.0.2, a logic error in Zebra's transaction verification cache could allow a malicious miner to induce a consensus split. By carefully submitting a trans…
-
High 8.4
Zebra has a Consensus Failure due to Improper Verification of V5 Transactions
ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.0 and zebra-consensus version 5.0.1, a logic error in Zebra's transaction verification cache could allow a malicious miner to induce a consensus split. By matching a valid transaction…