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CVE-2021-36161— Unprotected input value toString cause RCE

Quick assessment

Affected
Apache Software Foundation Apache Dubbo
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 Dubbo是美国阿帕奇（Apache）基金会的一款基于Java的轻量级RPC（远程过程调用）框架。该产品提供了基于接口的远程呼叫、容错和负载平衡以及自动服务注册和发现等功能。 Apache Dubbo 存在格式化字符串错误漏洞，该漏洞源于 Dubbo 中的某些组件会尝试打印输入参数的格式化字符串，这可能会导致具有特殊 toString 方法的恶意定制 bean 的 RCE。

AI Predicted 7.5 Difficulty: Moderate EPSS 2.47% · P84

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-36161

Vulnerability Information
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Vulnerability Title
Unprotected input value toString cause RCE
Source: CVE Program / CVE List V5
Vulnerability Description
Some component in Dubbo will try to print the formated string of the input arguments, which will possibly cause RCE for a maliciously customized bean with special toString method. In the latest version, we fix the toString call in timeout, cache and some other places. Fixed in Apache Dubbo 2.7.13
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 Dubbo 格式化字符串错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Dubbo是美国阿帕奇（Apache）基金会的一款基于Java的轻量级RPC（远程过程调用）框架。该产品提供了基于接口的远程呼叫、容错和负载平衡以及自动服务注册和发现等功能。 Apache Dubbo 存在格式化字符串错误漏洞，该漏洞源于 Dubbo 中的某些组件会尝试打印输入参数的格式化字符串，这可能会导致具有特殊 toString 方法的恶意定制 bean 的 RCE。
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 Dubbo Apache Dubbo 2.7.x ~ 2.7.12 -

II. Public POCs for CVE-2021-36161

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III. Intelligence Information for CVE-2021-36161

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Mailing List Discussions for CVE-2021-36161 (1)

Same Patch Batch · Apache Software Foundation · 2021-09-09 · 3 CVEs total

CVE-2021-38540 Apache Airflow: Variable Import endpoint missed authentication check
CVE-2021-37579 Bypass deserialization checks in Apache Dubbo

IV. Related Vulnerabilities

Same product: Apache Dubbo
Same vendor: Apache Software Foundation

V. Comments for CVE-2021-36161

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