FastAPI is a web framework for building APIs with Python 3.6+ based on standard Python type hints. FastAPI versions lower than 0.65.2 that used cookies for authentication in path operations that received JSON payloads sent by browsers were vulnerable to a Cross-Site Request Forgery (CSRF) attack. In versions lower than 0.65.2, FastAPI would try to read the request payload as JSON even if the content-type header sent was not set to application/json or a compatible JSON media type (e.g. application/geo+json). A request with a content type of text/plain containing JSON data would be accepted and the JSON data would be extracted. Requests with content type text/plain are exempt from CORS preflights, for being considered Simple requests. The browser will execute them right away including cookies, and the text content could be a JSON string that would be parsed and accepted by the FastAPI application. This is fixed in FastAPI 0.65.2. The request data is now parsed as JSON only if the content-type header is application/json or another JSON compatible media type like application/geo+json. It's best to upgrade to the latest FastAPI, but if updating is not possible then a middleware or a dependency that checks the content-type header and aborts the request if it is not application/json or another JSON compatible content type can act as a mitigating workaround.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - FastAPI is a web framework for building APIs with Python 3.6+ based on standard Python type hints. FastAPI     versions lower than 0.65.2 that used cookies for authentication in path operations that received JSON     payloads sent by browsers were vulnerable to a Cross-Site Request Forgery (CSRF) attack. In versions lower     than 0.65.2, FastAPI would try to read the request payload as JSON even if the content-type header sent     was not set to application/json or a compatible JSON media type (e.g. application/geo+json). A request     with a content type of text/plain containing JSON data would be accepted and the JSON data would be     extracted. Requests with content type text/plain are exempt from CORS preflights, for being considered     Simple requests. The browser will execute them right away including cookies, and the text content could be     a JSON string that would be parsed and accepted by the FastAPI application. This is fixed in FastAPI     0.65.2. The request data is now parsed as JSON only if the content-type header is application/json or     another JSON compatible media type like application/geo+json. It's best to upgrade to the latest FastAPI,     but if updating is not possible then a middleware or a dependency that checks the content-type header and     aborts the request if it is not application/json or another JSON compatible content type can act as a     mitigating workaround. (CVE-2021-32677)

Note that Nessus relies on the presence of the package as reported by the vendor.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - FastAPI is a web framework for building APIs with Python 3.6+ based on standard Python type hints. FastAPI
    versions lower than 0.65.2 that used cookies for authentication in path operations that received JSON
    payloads sent by browsers were vulnerable to a Cross-Site Request Forgery (CSRF) attack. In versions lower
    than 0.65.2, FastAPI would try to read the request payload as JSON even if the content-type header sent
    was not set to application/json or a compatible JSON media type (e.g. application/geo+json). A request
    with a content type of text/plain containing JSON data would be accepted and the JSON data would be
    extracted. Requests with content type text/plain are exempt from CORS preflights, for being considered
    Simple requests. The browser will execute them right away including cookies, and the text content could be
    a JSON string that would be parsed and accepted by the FastAPI application. This is fixed in FastAPI
    0.65.2. The request data is now parsed as JSON only if the content-type header is application/json or
    another JSON compatible media type like application/geo+json. It's best to upgrade to the latest FastAPI,
    but if updating is not possible then a middleware or a dependency that checks the content-type header and
    aborts the request if it is not application/json or another JSON compatible content type can act as a
    mitigating workaround. (CVE-2021-32677)

ID	Name	Product	Family	Severity
223921	Linux Distros Unpatched Vulnerability : CVE-2021-32677	Nessus	Misc.	high
412682	SCA: security update for fastapi (GHSA-8h2j-cgx8-6xv7)	Tenable Cloud Security	SCA Checks	high
412682	SCA: security update for fastapi (GHSA-8h2j-cgx8-6xv7)	Tenable Self-Hosted Container Security	SCA Checks	high

Detections

Analytics

CVE-2021-32677

high

Tenable Plugins

high

high

high