CVE-2021-30180 Apache Dubbo RCE on customers via Condition route poisoning (Unsafe YAML unmarshaling)

What is CVE-2021-30180?

CVE-2021-30180 is a critical unsafe deserialization vulnerability in Apache Dubbo, published on 31 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Apache Dubbo prior to 2.7.9 support Tag routing which will enable a customer to route the request to the right server. These rules are used by the customers when making a request in order to find the right endpoint. When parsing these YAML rules, Dubbo customers may enable calling arbitrary constructors.

Weakness: CWE-444

Which versions are affected by CVE-2021-30180?

2 open source packages ship an affected version, including org.apache.dubbo:dubbo. It affects 1 product.

Products include Apache Dubbo.

How do I fix CVE-2021-30180?

Upgrade org.apache.dubbo:dubbo to 2.7.10 or later.

Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.

Is CVE-2021-30180 being exploited?

There is no known exploitation of CVE-2021-30180 in the wild and no public exploit code.

Public exploit code: 1 proofs of concept on GitHub.

Other vulnerabilities in Apache Dubbo

• CVE-2023-29234 Bypass serialize checks in Apache Dubbo Critical 9.8
• CVE-2023-46279 Apache Dubbo: Bypass deny serialize list check in Apache Dubbo Critical 9.8
• CVE-2021-32824 Regular expression Denial of Service in MooTools Critical 9.8
• CVE-2022-39198 Apache Dubbo Hession Deserialization Vulnerability Gadgets Bypass Critical 9.8
• CVE-2021-43297 Dubbo Hessian cause RCE when parse error Critical 9.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-7wfc-x4f7-gg2x.