Deserialization in Apache Dubbo
CVE-2021-36163
In Apache Dubbo, users may choose to use the Hessian protocol. The Hessian protocol is implemented on top of HTTP and passes the body of a POST request directly to a HessianSkeleton: New HessianSkeleton are created without any configuration of the serialization factory and therefore without applying the dubbo properties for applying allowed or blocked type lists. In addition, the generic service is always exposed and therefore attackers do not need to figure out a valid service/method name pair. This is fixed in 2.7.13, 2.6.10.1
Vulnerability class: Insecure Deserialization
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.033 (87.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 87.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.033 · newest: 0.033 · change: 0.000
Affected products
- Apache Dubbo
- Apache Software Foundation Dubbo — versions Apache Dubbo 2.7.x, Apache Dubbo 2.6.x
Weakness classification (CWE)
Public proof-of-concept exploits
References
- lists.apache.org/thread.html/r8d0adc057bb15a37199502cc366f4b1164c9c536ce28e4def… (Mailing List, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-36163?
- CVE-2021-36163 is a critical-severity vulnerability in Apache Dubbo, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2021-09-07.
- How severe is CVE-2021-36163?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-36163 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.