CVE-2020-11093

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.

How to fix CVE-2020-11093

To remediate CVE-2020-11093, upgrade the affected package to a fixed version below.

• —upgrade to 1.12.4 or later
• —upgrade to 55056f22c83b7c3520488b615e1577e0f895d75a or later

Is CVE-2020-11093 being exploited?

Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 1.12.4
• from 0, < 55056f22c83b7c3520488b615e1577e0f895d75a | from 0, < 1.12.4

CVSS scores

References (7)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2020-11093
• PATCHgithub.com/hyperledger/indy-node
• WEBgithub.com/hyperledger/indy-node/blob/master/CHANGELOG.md#1124
• WEBgithub.com/hyperledger/indy-node/blob/master/docs/source/auth_rules.md