CVE-2021-36162 json
Unprotected yaml deserialization cause RCE
published 5y ago modified 4mo ago also GHSA-r577-4hq7-73qh , EUVD-2021-2105
- cvss
- 8.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.3%
- EPSS 2.3% chance of exploitation in 30 days, percentile 83%
- public exploits
- 0
- none known
Summary
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
Patch / fix
- maven org.apache.dubbo:dubbo 2.7.13, 3.0.2
Is CVE-2021-36162 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerExploit prediction
2.26% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.5 | AV:N/AC:L/Au:S/C:P/I:P/A:P |
| GitHub | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | org.apache.dubbo:dubbo | <2.7.13 >=3.0.0, <3.0.2 |
2.7.13 3.0.2 |
Affected products
- Apache Software Foundation Apache Dubbo
Classification
- Weakness
-
- CWE-77 Improper Neutralization of Special Elements used in a Command
References
-
lists.apache.org
/thread.html/rfa351115a459e214b99ffcc52c35f33359f3370c547d9c6ba1a60037%40%3Cdev.dubbo.apache.org%3E
web, mailing-list, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2021-36162
advisory
-
github.com
/apache/dubbo
package
Sources
- CVE List CVE-2021-36162
- GitHub Advisory GHSA-r577-4hq7-73qh
- NVD CVE-2021-36162
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