CVE-2021-21369

Potential DoS in Besu HTTP JSON-RPC API

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.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.58%
Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com
Affected: hyperledger besu
Published at:
Updated at:

References

Link Tags
https://github.com/hyperledger/besu/security/advisories/GHSA-qgfj-mjpc-7w3q third party advisory
https://github.com/hyperledger/besu/blob/master/CHANGELOG.md#151 third party advisory release notes
https://github.com/hyperledger/besu/pull/1144 third party advisory patch
https://github.com/hyperledger/besu/commit/06e35a58c07a30c0fbdc0aae45a3e8b06b53c022 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-21369?
CVE-2021-21369 has been scored as a medium severity vulnerability.
How to fix CVE-2021-21369?
To fix CVE-2021-21369, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-21369 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-21369 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-21369?
CVE-2021-21369 affects hyperledger besu.
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