CVE-2024-8616: H2O Vulnerable to Arbitrary File Overwrite

March 20, 2025

In h2oai/h2o-3 version 3.46.0, the /99/Models/{name}/json endpoint allows for arbitrary file overwrite on the target server. The vulnerability arises from the exportModelDetails function in ModelsHandler.java, where the user-controllable mexport.dir parameter is used to specify the file path for writing model details. This can lead to overwriting files at arbitrary locations on the host system.

References

github.com/advisories/GHSA-g48v-3p35-88jr
github.com/h2oai/h2o-3
github.com/h2oai/h2o-3/blob/088190f9d0370a02a483fca68d8dc89c996b4f83/h2o-core/src/main/java/water/api/ModelsHandler.java
huntr.com/bounties/aebf69a5-b9b1-4d2f-a8ff-902c11a8c97a
nvd.nist.gov/vuln/detail/CVE-2024-8616

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