CVE-2020-11093 Authorization bypass in Hyperledger Indy

What is CVE-2020-11093?

CVE-2020-11093 is a high-severity missing authorization vulnerability in hyperledger indy-node, published on 24 Dec 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-347

Which versions are affected by CVE-2020-11093?

3 open source packages ship an affected version, including indy-node. It affects 1 product.

Products include Linuxfoundation Indy-Node.

How do I fix CVE-2020-11093?

Upgrade indy-node to 1.12.4 or later.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2020-11093 being exploited?

There is no known exploitation of CVE-2020-11093 in the wild and no public exploit code.

Other vulnerabilities in hyperledger indy-node

• CVE-2022-31020 Remote code execution in Indy's NODE_UPGRADE transaction High 8.8
• CVE-2022-31006 Hyperledger Indy DOS vulnerability High 7.5
• CVE-2020-11090 Uncontrolled Resource Consumption in Indy Node High 7.5

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-wh2w-39f4-rpv2, PYSEC-2020-48.