RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.23, 4.1.14, 4.2.9, and 4.3.3, the optional rabbitmq_jms_topic_exchange plugin's x-jms-topic exchange accepted a client-controlled rjms_erlang_selector binding expression whose LIKE evaluator expanded percent and underscore wildcards into overlapping PCRE fragments. It executed those fragments with raw re:run/3 without match or recursion limits, allowing an authenticated tenant that can bind and publish to consume broker scheduler CPU and deny service with pathological selectors.
This issue is fixed in versions 4.0.23, 4.1.14, 4.2.9, and 4.3.3.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products
rabbitmq:rabbitmq-server
References 7
https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-chxf-3hfg-…
https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-chxf-3hfg-j8f7
https://github.com/rabbitmq/rabbitmq-server/commit/20203c50ea6ff459d462b2d43553…
https://github.com/rabbitmq/rabbitmq-server/commit/20203c50ea6ff459d462b2d4355326d3a870682c
https://github.com/rabbitmq/rabbitmq-server/commit/60de2fbbcd812ab294985cef260c…
https://github.com/rabbitmq/rabbitmq-server/commit/60de2fbbcd812ab294985cef260cc2f1b1a02a5b
https://github.com/rabbitmq/rabbitmq-server/commit/9e36b7f4c1e2eed77300288dca3e…
https://github.com/rabbitmq/rabbitmq-server/commit/9e36b7f4c1e2eed77300288dca3e01bd9b23c432
https://github.com/rabbitmq/rabbitmq-server/commit/f4d9da668b7304dfb9aeb2b4e9ff…
https://github.com/rabbitmq/rabbitmq-server/commit/f4d9da668b7304dfb9aeb2b4e9ff766a1275d021
https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.9
https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.2.9
https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.3
https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.3