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CVE-2023-42448

8.1 · HIGH

Hydra is the layer-two scalability solution for Cardano.

Published Oct 4, 2023CWE-20EPSS 0.98%

Overview

CVE-2023-42448 is a high-severity vulnerability. It was published on October 4, 2023 and has a CVSS 3.1 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Hydra is the layer-two scalability solution for Cardano. Prior to version 0.13.0, the specification states that the contestation period in the datum of the UTxO at the head validator must stay unchanged as the state progresses from Open to Closed (Close transaction), but no such check appears to be performed in the `checkClose` function of the head validator. This would allow a malicious participant to modify the contestation deadline of the head to either allow them to fanout the head without giving another participant the chance to contest, or prevent any participant from ever redistributing the funds locked in the head via a fan-out. Version 0.13.0 contains a patch for this issue.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/input-output-hk/hydra/blob/master/CHANGELOG.md#0130---2023-10-03GitHubgithub.com/input-output-hk/hydra/blob/master/hydra-plutus/src/Hydra/Contract/Head.hs#L284-L296GitHubgithub.com/input-output-hk/hydra/blob/master/hydra-plutus/src/Hydra/Contract/Head.hs#L320-L323GitHubgithub.com/input-output-hk/hydra/commit/2f45529729e28254a62f7a7c8d6649066923ed1fGitHubgithub.com/input-output-hk/hydra/security/advisories/GHSA-mgcx-6p7h-5996GitHubgithub.com/input-output-hk/hydra/blob/master/CHANGELOG.md#0130---2023-10-03GitHubgithub.com/input-output-hk/hydra/blob/master/hydra-plutus/src/Hydra/Contract/Head.hs#L284-L296GitHubgithub.com/input-output-hk/hydra/blob/master/hydra-plutus/src/Hydra/Contract/Head.hs#L320-L323GitHubgithub.com/input-output-hk/hydra/commit/2f45529729e28254a62f7a7c8d6649066923ed1fGitHubgithub.com/input-output-hk/hydra/security/advisories/GHSA-mgcx-6p7h-5996

How CyberStrike helps

Frequently asked questions

What is CVE-2023-42448?

CVE-2023-42448 is a high-severity vulnerability. It was published on October 4, 2023 and has a CVSS 3.1 base score of 8.1 (HIGH).

How severe is CVE-2023-42448?

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2023-42448?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-42448?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-42448 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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