Vulnerability in Apache Dubbo
CVE-2021-36162
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
EPSS: 0.020 (78.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Apache Dubbo
- Apache Software Foundation Dubbo — versions Apache Dubbo 2.7.x, Apache Dubbo 3.0.x
Public proof-of-concept exploits
References
- security@apache.org (Mailing List, x_refsource_MISC, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-36162?
- CVE-2021-36162 is a high-severity vulnerability in Apache Dubbo. CVSS score: 8.8/10. Published 2021-09-07.
- How severe is CVE-2021-36162?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-36162 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.