CVE-2021-21430

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

CVSS 6.2 MEDIUMEPSS 0.4%CWE-269

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 6.2EPSS 0.4%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

10 May 2021Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

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

Affected products

OpenAPITools · openapi-generator

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References

https://github.com/OpenAPITools/openapi-generator/pull/8787 https://github.com/OpenAPITools/openapi-generator/pull/8791 https://github.com/OpenAPITools/openapi-generator/security/advisories/GHSA-cqxr-xf2w-943w