CVE-2021-21430 – org.openapitools:openapi-generator

Package

Manager: maven
Name: org.openapitools:openapi-generator
Vulnerable Version: >=0 <5.1.0

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

EPSS: 0.00157 pctl0.37048

Details

Creation of Temporary File in Directory with Insecure Permissions in auto-generated Java, Scala code ### Impact **This vulnerability impacts generated code.** If this code was generated as a one-off occasion, not as a part of an automated CI/CD process, this code will remain vulnerable until fixed manually! On Unix-Like systems, the system temporary directory is shared between all local users. When files/directories are created, the default `umask` settings for the process are respected. As a result, by default, most processes/apis will create files/directories with the permissions `-rw-r--r--` and `drwxr-xr-x` respectively, unless an API that explicitly sets safe file permissions is used. This vulnerability exists due to the use of the JDK method `File.createTempFile`. This method creates an insecure temporary files that can leave application and system data vulnerable to exposure. Auto-generated code (Java, Scala) that deals with uploading or downloading binary data through API endpoints will create insecure temporary files during the process. For example, if the API endpoint returns a PDF file, the auto-generated clients will first download the PDF into a insecure temporary file that can be read by anyone on the system. Affected generators: - Java - `okhttp-gson` (default library) https://github.com/OpenAPITools/openapi-generator/blob/d85f61ff0cfd6b8cd7063a63f302998a51466269/modules/openapi-generator/src/main/resources/Java/libraries/okhttp-gson/ApiClient.mustache#L1085-L1088 - `jersey2` https://github.com/OpenAPITools/openapi-generator/blob/d85f61ff0cfd6b8cd7063a63f302998a51466269/modules/openapi-generator/src/main/resources/Java/libraries/jersey2/ApiClient.mustache#L1035-L1038 - `resteasy` https://github.com/OpenAPITools/openapi-generator/blob/d85f61ff0cfd6b8cd7063a63f302998a51466269/modules/openapi-generator/src/main/resources/Java/libraries/resteasy/ApiClient.mustache#L604-L607 - `retrofit2` https://github.com/OpenAPITools/openapi-generator/blob/d85f61ff0cfd6b8cd7063a63f302998a51466269/modules/openapi-generator/src/main/resources/Java/libraries/retrofit2/play26/ApiClient.mustache#L202-L208 - Scala - `scala-finch` https://github.com/OpenAPITools/openapi-generator/blob/764a3b044c19fadf4a0789473cde96a65b77868a/modules/openapi-generator/src/main/resources/scala-finch/api.mustache#L83-L88 - `scala-akka` https://github.com/OpenAPITools/openapi-generator/blob/150e24dc553a8ea5230ffb938ed3e6020e972faa/modules/openapi-generator/src/main/resources/scala-akka-http-server/multipartDirectives.mustache#L71-L73 ### Patches The issue has been patched by changing the generated code to use the JDK method `Files.createTempFile` and released in the v5.1.0 stable version. This vulnerability has the same root cause as CVE-2021-21364 from the `swagger-api/swagger-codegen` project as this project and that one both share the same original source tree. https://github.com/swagger-api/swagger-codegen/security/advisories/GHSA-hpv8-9rq5-hq7w ### For more information If you have any questions or comments about this advisory: * Open an issue in [OpenAPI Generator Github repo](https://github.com/openAPITools/openapi-generator/) * Email us at [security@openapitools.org](mailto:security@openapitools.org)

Metadata

Created: 2021-05-11T00:05:06Z
Modified: 2022-10-25T20:33:52Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/05/GHSA-cqxr-xf2w-943w/GHSA-cqxr-xf2w-943w.json
CWE IDs: ["CWE-269", "CWE-377", "CWE-378", "CWE-379", "CWE-668"]
Alternative ID: GHSA-cqxr-xf2w-943w
Finding: F028
Auto approve: 1