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CVE-2021-31522— Apache Kylin unsafe class loading

Quick assessment

Affected
Apache Software Foundation Apache Kylin
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache Kylin是美国阿帕奇（Apache）基金会的一款开源的分布式分析型数据仓库。该产品主要提供Hadoop/Spark之上的SQL查询接口及多维分析（OLAP）等功能。 Apache kylin 存在输入验证错误漏洞，该漏洞源于Kylin可以接收用户输入并通过class . forname(…)加载任何类。

AI Predicted 9.8 Difficulty: Easy EPSS 2.90% · P86

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2021-31522

Vulnerability Information
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Vulnerability Title
Apache Kylin unsafe class loading
Source: CVE Program / CVE List V5
Vulnerability Description
Kylin can receive user input and load any class through Class.forName(...). This issue affects Apache Kylin 2 version 2.6.6 and prior versions; Apache Kylin 3 version 3.1.2 and prior versions; Apache Kylin 4 version 4.0.0 and prior versions.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Kylin 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Kylin是美国阿帕奇（Apache）基金会的一款开源的分布式分析型数据仓库。该产品主要提供Hadoop/Spark之上的SQL查询接口及多维分析（OLAP）等功能。 Apache kylin 存在输入验证错误漏洞，该漏洞源于Kylin可以接收用户输入并通过class . forname(…)加载任何类。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache Kylin Apache Kylin 2 ~ 2.6.6 -

II. Public POCs for CVE-2021-31522

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III. Intelligence Information for CVE-2021-31522

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Mailing List Discussions for CVE-2021-31522 (2)

Same Patch Batch · Apache Software Foundation · 2022-01-06 · 10 CVEs total

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CVE-2021-45456 Command injection
CVE-2021-36774 Mysql JDBC Connector Deserialize RCE
CVE-2021-27738 Improper Access Control to Streaming Coordinator & SSRF
CVE-2021-36739 XSS vulnerability in the MVCBean JSP portlet maven archetype
CVE-2021-36738 XSS vulnerability in the JSP version of the Apache Pluto Applicant MVCBean CDI portlet
CVE-2021-36737 XSS in V3 Demo Portlet

IV. Related Vulnerabilities

Same product: Apache Kylin
Same vendor: Apache Software Foundation

V. Comments for CVE-2021-31522

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