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Multisignature checks succeeds without checking all keys

Moderate
ch1bo published GHSA-c8qp-cv4h-vcc4 Jul 17, 2023

Package

hydra-node (Cardano)

Affected versions

<= 0.11.0

Patched versions

None

Description

Impact

What kind of vulnerability is it? Who is impacted?

All users of a hydra-node

Patches

Has the problem been patched? What versions should users upgrade to?

Yes, in b13d95a and #976

Workarounds

Is there a way for users to fix or remediate the vulnerability without upgrading?

Not really

References

Are there any links users can visit to find out more?

Description:

The check for the multisignature validity is not complete in case the list of keys is the proper prefix of the multisignature list (two lists are not of the same length). In this case hydra-node would skip validating certain verification key/s.

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:N

CVE ID

No known CVE

Weaknesses

No CWEs

Credits