Impact

If a consensus client sends a malformed consensus request to an orderer it may crash the orderer node.
This fix checks for the malformed consensus request and returns an error to the consensus client.

Patches

Fixed in v2.2.7 and v2.4.5.

Workarounds

None, users must upgrade to v2.2.7 or v2.4.5.

References

https://github.com/hyperledger/fabric/releases/tag/v2.2.7
https://github.com/hyperledger/fabric/releases/tag/v2.4.5

For more information

If you have any questions or comments about this advisory:

• Open an issue in Hyperledger Fabric repository

Credits

Thank you to Haosheng Wang of OPPO ZIWU Security Lab for this disclosure.