Improper input validation in Input-Output-Hk Hydra
CVE-2023-42448
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.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.008 (52.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H.
Affected products
- Input-output-hk Hydra — versions < 0.13.0
- Iohk Hydra
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
- security-advisories@github.com (Product, x_refsource_MISC)
- security-advisories@github.com (Product, x_refsource_MISC)
Frequently asked questions
- What is CVE-2023-42448?
- CVE-2023-42448 is a high-severity vulnerability in Input-Output-Hk Hydra, classified under Improper Input Validation. CVSS score: 8.1/10. Published 2023-10-04.
- How severe is CVE-2023-42448?
- High severity. CVSS v3 base score is 8.1 out of 10.
- Is CVE-2023-42448 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.