CVE-2021-21430 Creation of Temporary File in Directory with Insecure Permissions in auto-generated Java, Scala code

2021-05-1019:25:12

CWE-269

GitHub_M

www.cve.org

openapi

vulnerability

temporary file

insecure permissions

java

scala

api

file creation

CVSS3

6.2

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

EPSS

0.001

Percentile

29.1%

JSON

OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec. Using File.createTempFile in JDK will result in creating and using insecure temporary files that can leave application and system data vulnerable to attacks. Auto-generated code (Java, Scala) that deals with uploading or downloading binary data through API endpoints will create insecure temporary files during the process. Affected generators: java (jersey2, okhttp-gson (default library)), scala-finch. The issue has been patched with Files.createTempFile and released in the v5.1.0 stable version.

CNA Affected

[
  {
    "product": "openapi-generator",
    "vendor": "OpenAPITools",
    "versions": [
      {
        "status": "affected",
        "version": "< 5.1.0"
      }
    ]
  }
]