RabbitMQ has predictable credential obfuscation seed value used in Shovel and Federation plugins

Impact

Shovel and Federation plugins perform URI obfuscation in their worker (link) state. The encryption key used to encrypt the URI was seeded with a predictable secret.

This means that in case of certain exceptions related to Shovel and Federation plugins, reasonably easily deobfuscatable data could appear in the node log.

Patched versions correctly use a cluster-wide secret for that purpose.

Patches

Patched versions:

• 3.10.2
• 3.9.18
• 3.8.32

Workarounds

Disable Shovel and Federation plugins.

Credits

RabbitMQ core team would like to thank Lajos @luos Gerecs and Anh Nguyen from Erlang Solutions for responsibly disclosing and working with us on a patch for this vulnerability.

For more information

• Mailing list
• Community Slack