CVE-2021-36162

Unprotected yaml deserialization cause RCE

Description

Apache Dubbo supports various rules to support configuration override or traffic routing (called routing in Dubbo). These rules are loaded into the configuration center (eg: Zookeeper, Nacos, ...) and retrieved by the customers when making a request in order to find the right endpoint. When parsing these YAML rules, Dubbo customers will use SnakeYAML library to load the rules which by default will enable calling arbitrary constructors. An attacker with access to the configuration center he will be able to poison the rule so when retrieved by the consumers, it will get RCE on all of them. This was fixed in Dubbo 2.7.13, 3.0.2

8.8

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 1.09% Top 25%

Vendor Advisory apache.org

Affected: Apache Software Foundation Apache Dubbo

References

Link	Tags
https://lists.apache.org/thread.html/rfa351115a459e214b99ffcc52c35f33359f3370c547d9c6ba1a60037%40%3Cdev.dubbo.apache.org%3E	mailing list vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-36162?: CVE-2021-36162 has been scored as a high severity vulnerability.
How to fix CVE-2021-36162?: To fix CVE-2021-36162, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-36162 being actively exploited in the wild?: It is possible that CVE-2021-36162 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-36162?: CVE-2021-36162 affects Apache Software Foundation Apache Dubbo.

This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.