Vulnerability Description
Hyperledger Besu is an open-source, MainNet compatible, Ethereum client written in Java. In Besu before version 1.5.1 there is a denial-of-service vulnerability involving the HTTP JSON-RPC API service. If username and password authentication is enabled for the HTTP JSON-RPC API service, then prior to making any requests to an API endpoint the requestor must use the login endpoint to obtain a JSON web token (JWT) using their credentials. A single user can readily overload the login endpoint with invalid requests (incorrect password). As the supplied password is checked for validity on the main vertx event loop and takes a relatively long time this can cause the processing of other valid requests to fail. A valid username is required for this vulnerability to be exposed. This has been fixed in version 1.5.1.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linuxfoundation | Besu | < 1.5.1 |
Related Weaknesses (CWE)
References
- https://github.com/hyperledger/besu/blob/master/CHANGELOG.md#151Release NotesThird Party Advisory
- https://github.com/hyperledger/besu/commit/06e35a58c07a30c0fbdc0aae45a3e8b06b53cPatchThird Party Advisory
- https://github.com/hyperledger/besu/pull/1144PatchThird Party Advisory
- https://github.com/hyperledger/besu/security/advisories/GHSA-qgfj-mjpc-7w3qThird Party Advisory
- https://github.com/hyperledger/besu/blob/master/CHANGELOG.md#151Release NotesThird Party Advisory
- https://github.com/hyperledger/besu/commit/06e35a58c07a30c0fbdc0aae45a3e8b06b53cPatchThird Party Advisory
- https://github.com/hyperledger/besu/pull/1144PatchThird Party Advisory
- https://github.com/hyperledger/besu/security/advisories/GHSA-qgfj-mjpc-7w3qThird Party Advisory
FAQ
What is CVE-2021-21369?
CVE-2021-21369 is a vulnerability with a CVSS score of 6.5 (MEDIUM). Hyperledger Besu is an open-source, MainNet compatible, Ethereum client written in Java. In Besu before version 1.5.1 there is a denial-of-service vulnerability involving the HTTP JSON-RPC API service...
How severe is CVE-2021-21369?
CVE-2021-21369 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-21369?
Check the references section above for vendor advisories and patch information. Affected products include: Linuxfoundation Besu.