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CVE-2021-42855— Local privilege escalation due to misconfigured write permission on .debug_command.config file

Quick assessment

Affected
Aternity SteelCentral AppInternals Dynamic Sampling Agent
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.

Aternity SteelCentral AppInternals是美国Aternity公司的一个监控现代自动化解决方案。提供应用程序性能监控 (APM) 和诊断。 Aternity SteelCentral AppInternals Dynamic Sampling Agent (DSA) 存在安全漏洞，该漏洞源于配置文件可以将相应的 ID 映射到要执行的命令。

CVSS 7.8 · High EPSS 0.22% · P12
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I. Basic Information for CVE-2021-42855

Vulnerability Information
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Vulnerability Title
Local privilege escalation due to misconfigured write permission on .debug_command.config file
Source: CVE Program / CVE List V5
Vulnerability Description
It was discovered that the SteelCentral AppInternals Dynamic Sampling Agent (DSA) uses the ".debug_command.config" file to store a json string that contains a list of IDs and pre-configured commands. The config file is subsequently used by the "/api/appInternals/1.0/agent/configuration" API to map the corresponding ID to a command to be executed.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Aternity SteelCentral AppInternals 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Aternity SteelCentral AppInternals是美国Aternity公司的一个监控现代自动化解决方案。提供应用程序性能监控 (APM) 和诊断。 Aternity SteelCentral AppInternals Dynamic Sampling Agent (DSA) 存在安全漏洞，该漏洞源于配置文件可以将相应的 ID 映射到要执行的命令。
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
Aternity SteelCentral AppInternals Dynamic Sampling Agent 10.x -

II. Public POCs for CVE-2021-42855

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III. Intelligence Information for CVE-2021-42855

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Other References for CVE-2021-42855 (1)

Same Patch Batch · Aternity · 2022-03-09 · 7 CVEs total

CVE-2021-42786 9.8 CRITICAL Remote Code Execution at AgentControllerServlet
CVE-2021-42854 9.8 CRITICAL Directory Traversal Read/Write/Delete at PluginServlet
CVE-2021-42787 9.4 CRITICAL Directory Traversal Write/Delete/Partial Read at AgentConfigurationServlet
CVE-2021-42853 9.1 CRITICAL Directory Traversal Delete/Read at AgentDiagnosticServlet
CVE-2021-42857 5.3 MEDIUM Directory Traversal Partial Write at AgentDaServlet
CVE-2021-42856 4.7 MEDIUM Reflected Cross-site Scripting at DsaDataTest

IV. Related Vulnerabilities

Same product: SteelCentral AppInternals Dynamic Sampling Agent
Same vendor: Aternity
Same weakness: CWE-284

V. Comments for CVE-2021-42855

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