Starlette is an Asynchronous Server Gateway Interface (ASGI) framework/toolkit. Prior to version 0.40.0, Starlette treats `multipart/form-data` parts without a `filename` as text form fields and buffers those in byte strings with no size limit. This allows an attacker to upload arbitrary large form fields and cause Starlette to both slow down significantly due to excessive memory allocations and copy operations, and also consume more and more memory until the server starts swapping and grinds to a halt, or the OS terminates the server process with an OOM error. Uploading multiple such requests in parallel may be enough to render a service practically unusable, even if reasonable request size limits are enforced by a reverse proxy in front of Starlette. This Denial of service (DoS) vulnerability affects all applications built with Starlette (or FastAPI) accepting form requests. Verison 0.40.0 fixes this issue.

The remote Fedora 41 host has packages installed that are affected by a vulnerability as referenced in the FEDORA-2024-05dedb1a53 advisory.

    Security fix for CVE-2024-47874.

    ## Starlette 0.40.0 (October 15, 2024)

    This release fixes a Denial of service (DoS) via `multipart/form-data` requests.

    You can view the full security advisory:
    [GHSA-f96h-pmfr-66vw](https://github.com/encode/starlette/security/advisories/GHSA-f96h-pmfr-66vw)

    #### Fixed

    - Add `max_part_size` to `MultiPartParser` to limit the size of parts in `multipart/form-data`       requests [fd038f3](https://github.com/encode/starlette/commit/fd038f3070c302bff17ef7d173dbb0b007617733).

    ## FastAPI 0.115.2

    - https://github.com/fastapi/fastapi/releases/tag/0.115.2
    - https://github.com/fastapi/fastapi/releases/tag/0.115.1

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 40 host has packages installed that are affected by a vulnerability as referenced in the FEDORA-2024-f1615b58e6 advisory.

    Security fix for CVE-2024-47874.

    ## Starlette 0.40.0 (October 15, 2024)

    This release fixes a Denial of service (DoS) via `multipart/form-data` requests.

    You can view the full security advisory:
    [GHSA-f96h-pmfr-66vw](https://github.com/encode/starlette/security/advisories/GHSA-f96h-pmfr-66vw)

    #### Fixed

    - Add `max_part_size` to `MultiPartParser` to limit the size of parts in `multipart/form-data`       requests [fd038f3](https://github.com/encode/starlette/commit/fd038f3070c302bff17ef7d173dbb0b007617733).

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote openSUSE 15 host has a package installed that is affected by a vulnerability as referenced in the SUSE- SU-2024:3719-1 advisory.

    - CVE-2024-47874: Fixed possible DoS via parts size in multipart/form-data requests (bsc#1231689)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
211407	Fedora 41 : python-fastapi / python-openapi-core / python-platformio / etc (2024-05dedb1a53)	Nessus	Fedora Local Security Checks	high
209616	Fedora 40 : python-fastapi / python-openapi-core / python-platformio / etc (2024-f1615b58e6)	Nessus	Fedora Local Security Checks	high
209331	openSUSE 15 Security Update : python-starlette (SUSE-SU-2024:3719-1)	Nessus	SuSE Local Security Checks	high

Detections

Analytics

CVE-2024-47874

high

Tenable Plugins

high

high

high