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CVE-2021-32769— Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in micronaut-core

Quick assessment

Affected
micronaut-projects micronaut-core
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.

Object Computing micronaut是美国Object Computing公司的一款基于JVM的全栈框架，它主要用于构建模块化微服务和无服务器应用程序。 Micronaut 2.5.9 之前的版本存在路径遍历漏洞，该漏洞源于Micronaut 不限制对配置路径的文件访问。攻击者通过基本配置，可以使用 URL 中的“/../../”从文件系统访问任何文件。

CVSS 7.5 · High EPSS 1.73% · P76

Possible ATT&CK Techniques 1 AI

T1083 · File and Directory Discovery
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I. Basic Information for CVE-2021-32769

Vulnerability Information
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Vulnerability Title
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in micronaut-core
Source: CVE Program / CVE List V5
Vulnerability Description
Micronaut is a JVM-based, full stack Java framework designed for building JVM applications. A path traversal vulnerability exists in versions prior to 2.5.9. With a basic configuration, it is possible to access any file from a filesystem, using "/../../" in the URL. This occurs because Micronaut does not restrict file access to configured paths. The vulnerability is patched in version 2.5.9. As a workaround, do not use `**` in mapping, use only `*`, which exposes only flat structure of a directory not allowing traversal. If using Linux, another workaround is to run micronaut in chroot.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Object Computing micronaut 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Object Computing micronaut是美国Object Computing公司的一款基于JVM的全栈框架，它主要用于构建模块化微服务和无服务器应用程序。 Micronaut 2.5.9 之前的版本存在路径遍历漏洞，该漏洞源于Micronaut 不限制对配置路径的文件访问。攻击者通过基本配置，可以使用 URL 中的“/../../”从文件系统访问任何文件。
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
micronaut-projects micronaut-core < 2.5.9 -

II. Public POCs for CVE-2021-32769

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III. Intelligence Information for CVE-2021-32769

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Patches & Fixes for CVE-2021-32769 (1)

Vendor Advisories for CVE-2021-32769 (1)

IV. Related Vulnerabilities

Same product: micronaut-core
Same vendor: micronaut-projects
Same weakness: CWE-22

V. Comments for CVE-2021-32769

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