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CVE-2021-42857— Directory Traversal Partial Write at AgentDaServlet

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。 SteelCentral AppInternals Dynamic Sampling Agent(DSA) AgentDaServlet存在安全漏洞，该漏洞允许注入恶意负载的用户输入进行任何验证。

CVSS 5.3 · Medium EPSS 1.15% · P66
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I. Basic Information for CVE-2021-42857

Vulnerability Information
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Vulnerability Title
Directory Traversal Partial Write at AgentDaServlet
Source: CVE Program / CVE List V5
Vulnerability Description
It was discovered that the SteelCentral AppInternals Dynamic Sampling Agent's (DSA) AgentDaServlet has directory traversal vulnerabilities at the "/api/appInternals/1.0/agent/da/pcf" API. The affected endpoint does not have any validation of the user's input that allows a malicious payload to be injected.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Aternity SteelCentral AppInternals 路径遍历漏洞
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。 SteelCentral AppInternals Dynamic Sampling Agent(DSA) AgentDaServlet存在安全漏洞，该漏洞允许注入恶意负载的用户输入进行任何验证。
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-2021-42857

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III. Intelligence Information for CVE-2021-42857

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Other References for CVE-2021-42857 (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-2021-42855 7.8 HIGH Local privilege escalation due to misconfigured write permission on .debug_command.config
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-20

V. Comments for CVE-2021-42857

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