Snapshot signature not including HeadID will allow replay attacks
Summary
Snapshot signature not including HeadID will allow replay attacks
Original description
The description as published by the source.
Hydra is the layer-two scalability solution for Cardano. Prior to version 0.13.0, not signing and verifying $\mathsf{cid}$ allows an attacker (which must be a participant of this head) to use a snapshot from an old head instance with the same participants to close the head or contest the state with it. This can lead to an incorrect distribution of value (= value extraction attack; hard, but possible) or prevent the head to finalize because the value available is not consistent with the closed utxo state (= denial of service; easy). A patch is planned for version 0.13.0. As a workaround, rotate keys between heads so not to re-use keys and not result in the same multi-signature participants.
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov
- web github.com
- web github.com
- web github.com