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

2021-03-1103:05:16

CWE-732

CWE-200

CWE-378

GitHub_M

www.cve.org

open-source

documentation

api

unix-like systems

temporary directory

umask settings

api clients

server stubs

file permissions

vulnerability

CVSS3

5.3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:N/A:N

AI Score

6.4

Confidence

High

EPSS

Percentile

15.6%

JSON

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.

CNA Affected

[
  {
    "product": "swagger-codegen",
    "vendor": "swagger-api",
    "versions": [
      {
        "status": "affected",
        "version": "< 2.4.19"
      }
    ]
  }
]