CVE-2023-42806 — Hydra is the layer-two scalability solution for Cardano
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 c
Published
2023-09-21T16:45:34.742Z
Last modified
2024-09-24T14:50:38.940Z
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
01What is this vulnerability?
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…
02Affected products
| Vendor | Product | Versions |
|---|
| input-output-hk | hydra | < 0.13.0 |
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:
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07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2023-09-21T16:45:34.742Z
- Last modified: 2024-09-24T14:50:38.940Z
09References
- github.com — https://github.com/input-output-hk/hydra/security/advisories/GHSA-gr36-mc6v-72qq
- github.com — https://github.com/input-output-hk/hydra/blob/ec6c7a2ab651462228475d0b34264e9a18…
- github.com — https://github.com/input-output-hk/hydra/blob/ec6c7a2ab651462228475d0b34264e9a18…
- github.com — https://github.com/input-output-hk/hydra/blob/ec6c7a2ab651462228475d0b34264e9a18…
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