CVE-2021-25641 (GCVE-0-2021-25641)
Vulnerability from cvelistv5
Published
2021-05-29 07:30
Modified
2024-08-03 20:11
Severity ?
CWE
  • Remote Code Execution by tempering the serialization id on server side.
Summary
Each Apache Dubbo server will set a serialization id to tell the clients which serialization protocol it is working on. But for Dubbo versions before 2.7.8 or 2.6.9, an attacker can choose which serialization id the Provider will use by tampering with the byte preamble flags, aka, not following the server's instruction. This means that if a weak deserializer such as the Kryo and FST are somehow in code scope (e.g. if Kryo is somehow a part of a dependency), a remote unauthenticated attacker can tell the Provider to use the weak deserializer, and then proceed to exploit it.
References
security@apache.orghttps://lists.apache.org/thread.html/r99ef7fa35585d3a68762de07e8d2b2bc48b8fa669a03e8d84b9673f3%40%3Cdev.dubbo.apache.org%3EMailing List, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.apache.org/thread.html/r99ef7fa35585d3a68762de07e8d2b2bc48b8fa669a03e8d84b9673f3%40%3Cdev.dubbo.apache.org%3EMailing List, Vendor Advisory
Impacted products
Vendor Product Version
Apache Software Foundation Apache Dubbo Version: Apache Dubbo 2.7.x   < 2.7.8
Version: Apache Dubbo 2.6.x   < 2.6.9
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