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CVE-2021-21364— Generated Code Contains Local Information Disclosure Vulnerability

Quick assessment

Affected
swagger-api swagger-codegen
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

HugoMario swagger-codegen是 （HugoMario） 的一个应用软件。用于在给定OpenAPI Spec的情况下自动生成API客户端库（生成SDK），服务器存根和文档。 Swagger-codegen 2.4.19版本中存在信息泄露漏洞。该漏洞源于网络系统或产品在运行过程中存在配置等错误。未授权的攻击者可利用漏洞获取受影响组件敏感信息。

CVSS 5.3 · Medium EPSS 0.28% · P21

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts
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I. Basic Information for CVE-2021-21364

Vulnerability Information
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Vulnerability Title
Generated Code Contains Local Information Disclosure Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
swagger-codegen is an open-source project which contains a template-driven engine to generate documentation, API clients and server stubs in different languages by parsing your OpenAPI / Swagger definition. In swagger-codegen before version 2.4.19, on Unix-Like systems, the system temporary directory is shared between all local users. When files/directories are created, the default `umask` settings for the process are respected. As a result, by default, most processes/apis will create files/directories with the permissions `-rw-r--r--` and `drwxr-xr-x` respectively, unless an API that explicitly sets safe file permissions is used. Because this vulnerability impacts generated code, the generated code will remain vulnerable until fixed manually! This vulnerability is fixed in version 2.4.19. Note this is a distinct vulnerability from CVE-2021-21363.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
HugoMario swagger-codegen 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
HugoMario swagger-codegen是 （HugoMario） 的一个应用软件。用于在给定OpenAPI Spec的情况下自动生成API客户端库（生成SDK），服务器存根和文档。 Swagger-codegen 2.4.19版本中存在信息泄露漏洞。该漏洞源于网络系统或产品在运行过程中存在配置等错误。未授权的攻击者可利用漏洞获取受影响组件敏感信息。
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
swagger-api swagger-codegen < 2.4.19 -

II. Public POCs for CVE-2021-21364

# POC Description Source Link Shenlong Link
1 None https://github.com/andikahilmy/CVE-2021-21364-swagger-codegen-vulnerable POC Details
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III. Intelligence Information for CVE-2021-21364

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Patches & Fixes for CVE-2021-21364 (1)

Vendor Advisories for CVE-2021-21364 (1)

IV. Related Vulnerabilities

Same product: swagger-codegen
Same vendor: swagger-api
Same weakness: CWE-200

V. Comments for CVE-2021-21364

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