Headline
CVE-2021-22095: CVE-2021-22097: Spring-AMQP Remote Denial of Service - Deserialization of a Maliciously Constructed java.util.Dictionary Object | Security
In Spring AMQP versions 2.2.0 - 2.2.19 and 2.3.0 - 2.3.11, the Spring AMQP Message object, in its toString() method, will create a new String object from the message body, regardless of its size. This can cause an OOM Error with a large message
All Vulnerability Reports
Severity
Medium
Vendor
Spring by VMware
Description
The Spring AMQP Message object, in its toString() method, will deserialize a body for a message with content type application/x-java-serialized-object. Classes in the java.lang and java.util packages are trusted.
It is possible to construct a malicious java.util.Dictionary object that can cause 100% CPU usage in the application if the toString() method is called.
This requires the attacker to have privileges to directly publish messages with such a body to the RabbitMQ server.
Affected VMware Products and Versions
Severity is medium unless otherwise noted.
- Spring AMQP
- 2.2.0 - 2.2.18
- 2.3.0 - 2.3.10
Mitigation
Do not allow untrustworthy actors to publish arbitrary data to RabbitMQ. Users of affected versions should apply the following mitigation. 2.3.x users should upgrade to 2.3.11. 2.2.x users should upgrade to 2.2.19. No other steps are necessary. Releases that have fixed this issue include:
- Spring AMQP
- 2.3.11
- 2.2.19
Credit
This issue was identified and responsibly reported by r00t4dm Cloud-Penetrating Arrow Lab of Meituan Corp Information Security Department.
References
- https://tanzu.vmware.com/security/cve-2021-22097
History
2021-10-26: Initial vulnerability report published.