CVE-2021-21430

Public Exploit
Creation of Temporary File in Directory with Insecure Permissions in auto-generated Java, Scala code

Description

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.

Categories

6.2
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.16%
Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com
Affected: OpenAPITools openapi-generator
Published at:
Updated at:

References

Link Tags
https://github.com/OpenAPITools/openapi-generator/security/advisories/GHSA-cqxr-xf2w-943w third party advisory exploit
https://github.com/OpenAPITools/openapi-generator/pull/8791 third party advisory patch
https://github.com/OpenAPITools/openapi-generator/pull/8787 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-21430?
CVE-2021-21430 has been scored as a medium severity vulnerability.
How to fix CVE-2021-21430?
To fix CVE-2021-21430, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-21430 being actively exploited in the wild?
It is possible that CVE-2021-21430 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-21430?
CVE-2021-21430 affects OpenAPITools openapi-generator.
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