Deserialization in Apache Dubbo
CVE-2020-11995
A deserialization vulnerability existed in dubbo 2.7.5 and its earlier versions, which could lead to malicious code execution. Most Dubbo users use Hessian2 as the default serialization/deserialization protool, during Hessian2 deserializing the HashMap object, some functions in the classes stored in HasMap will be executed after a series of program calls, however, those special functions may cause remote command execution. For example, the hashCode() function of the EqualsBean class in rome-1.7.0.jar will cause the remotely load malicious classes and execute malicious code by constructing a malicious request. This issue was fixed in Apache Dubbo 2.6.9 and 2.7.8.
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: 0.057 (92.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 92.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.057 · newest: 0.057 · change: 0.000
Affected products
- Apache Dubbo
- Apache Software Foundation Dubbo — versions Apache Dubbo
Weakness classification (CWE)
Public proof-of-concept exploits
References
- lists.apache.org/thread.html/r5b2df4ef479209dc4ced457b3d58a887763b60b9354c3dc14… (Mailing List, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-11995?
- CVE-2020-11995 is a critical-severity vulnerability in Apache Dubbo, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2021-01-11.
- How severe is CVE-2020-11995?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2020-11995 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.