CVSS 3.1 Score 6.5 of 10 (medium)


Published Sep 21, 2023
Updated: Sep 26, 2023
CWE ID 347


CVE-2023-42806 is a vulnerability in Hydra, the layer-two scalability solution for Cardano. Versions prior to 0.13.0 are affected. The vulnerability allows an attacker, who must be a participant in the head, to use an old snapshot with the same participants to close or contest the head's state. This can result in value extraction attacks or denial of service. A patch is planned for version 0.13.0, but as a workaround, rotating keys between heads and avoiding re-use of keys can prevent the vulnerability. The vulnerability has a base severity rating of MEDIUM and requires HIGH privileges to exploit over the network, with a high impact on integrity and availability.

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