CVE-2021-21430 : OpenAPI Generator allows generation of API client libraries (SDK generation), se

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.

Published 2021-05-10 20:15:08

Updated 2022-10-24 20:46:45

Source GitHub, Inc.

View at NVD, CVE.org

Products affected by CVE-2021-21430

Openapi-generator » Openapi Generator
Versions before (<) 5.1.1
cpe:2.3:a:openapi-generator:openapi_generator:*:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2021-21430

EPSS FAQ

0.07%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 27 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-21430

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
2.1	LOW	AV:L/AC:L/Au:N/C:P/I:N/A:N	3.9	2.9	NIST
Access Vector: Local Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: None Availability Impact: None
5.5	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N	1.8	3.6	NIST
Attack Vector: Local Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: High Integrity: None Availability: None
6.2	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	2.5	3.6	GitHub, Inc.
Attack Vector: Local Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: None Availability: None

CWE ids for CVE-2021-21430

CWE-269 Improper Privilege Management

The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.

Assigned by: security-advisories@github.com (Secondary)
CWE-668 Exposure of Resource to Wrong Sphere

The product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-21430

https://github.com/OpenAPITools/openapi-generator/pull/8787

[Java] use Files.createTempFile instead by wing328 · Pull Request #8787 · OpenAPITools/openapi-generator · GitHub
Patch;Third Party Advisory
https://github.com/OpenAPITools/openapi-generator/security/advisories/GHSA-cqxr-xf2w-943w

Generated Java and Scala Code Contains Local Information Disclosure Vulnerability · Advisory · OpenAPITools/openapi-generator · GitHub
Exploit;Third Party Advisory
https://github.com/OpenAPITools/openapi-generator/pull/8791

[Scala][Finch] use Files.createTempFile to avoid potential security issues by wing328 · Pull Request #8791 · OpenAPITools/openapi-generator · GitHub
Patch;Third Party Advisory

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Vulnerability Details : CVE-2021-21430

Products affected by CVE-2021-21430

Exploit prediction scoring system (EPSS) score for CVE-2021-21430

CVSS scores for CVE-2021-21430

CWE ids for CVE-2021-21430

References for CVE-2021-21430