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Vulnerability · Published May 10, 2021 · Assigned by GitHub_M

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

Medium 6.2

In plain English

A medium-severity privilege mismanagement in openapi-generator from OpenAPITools. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.2Medium
Exploit odds (30 days)0.4%top 65.2% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Mavenorg.openapitools:openapi-generator5.1.0GHSA-cqxr-xf2w-943w

Affected products (as reported)

VendorProductVersions
OpenAPITools openapi-generator < 5.1.0

Weakness: CWE-269 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References