CVE-2020-11093

Authorization bypass in Hyperledger Indy

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

Hyperledger Indy Node es la parte del servidor de un libro mayor distribuido diseñado específicamente para la identidad descentralizada. En Hyperledger Indy versiones anteriores a 1.12.4, se presenta una falta de verificación de firma en una transacción específica que permite a un atacante hacer determinadas alteraciones no autorizadas en el libro mayor. La actualización de un DID con una transacción nym será escrita en el libro mayor si ningún ROL ni CLAVE, han sido cambiados, independientemente del remitente. Un DID malicioso sin un rol en particular puede requerir una actualización para otro DID (pero no puede modificar su clave o rol). Esto es malo porque 1) Cualquier DID puede escribir una transacción nym en el libro mayor (es decir, cualquier DID puede enviar spam al libro mayor con transacciones nym), 2) Cualquier DID puede cambiar el alias de cualquier otro DID, 3) La transacción de actualización modifica los metadatos del libro mayor asociado con un DID

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-03-30 CVE Reserved
2020-12-24 CVE Published
2023-09-09 EPSS Updated
2024-08-04 CVE Updated
2024-08-04 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-347: Improper Verification of Cryptographic Signature

CAPEC

References (4)

URL	Tag	Source
https://github.com/hyperledger/indy-node/blob/master/CHANGELOG.md#1124	Release Notes
https://github.com/hyperledger/indy-node/blob/master/docs/source/auth_rules.md	Third Party Advisory

URL	Date	SRC
https://github.com/hyperledger/indy-node/security/advisories/GHSA-wh2w-39f4-rpv2	2024-08-04

URL	Date	SRC
https://github.com/hyperledger/indy-node/commit/55056f22c83b7c3520488b615e1577e0f895d75a	2020-12-31

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linuxfoundation Search vendor "Linuxfoundation"		Indy-node Search vendor "Linuxfoundation" for product "Indy-node"				< 1.12.4 Search vendor "Linuxfoundation" for product "Indy-node" and version " < 1.12.4"		-		Affected