CVE-2020-11093 Information

Description

Hyperledger Indy Node is the server portion of a distributed ledger purpose-built for decentralized identity. In Hyperledger Indy before version 1.12.4 there is lack of signature verification on a specific transaction which enables an attacker to make certain unauthorized alterations to the ledger. Updating a DID with a nym transaction will be written to the ledger if neither ROLE or VERKEY are being changed regardless of sender. A malicious DID with no particular role can ask an update for another DID (but cannot modify its verkey or role). This is bad because 1) Any DID can write a nym transaction to the ledger (i.e. any DID can spam the ledger with nym transactions) 2) Any DID can change any other DID’s alias 3) The update transaction modifies the ledger metadata associated with a DID.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Reference

https://github.com/hyperledger/indy-node/security/advisories/GHSA-wh2w-39f4-rpv2 https://github.com/hyperledger/indy-node/blob/master/CHANGELOG.md#1124 https://github.com/hyperledger/indy-node/blob/master/docs/source/auth_rules.md https://github.com/hyperledger/indy-node/commit/55056f22c83b7c3520488b615e1577e0f895d75a

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

7.5