Potential denial-of-service vulnerability in ASGI requests via memory upload limit bypass

An issue was discovered in 6.0 before 6.0.4, 5.2 before 5.2.13, and 4.2 before 4.2.30.

ASGI requests with a missing or understated `Content-Length` header could

bypass the `DATA_UPLOAD_MAX_MEMORY_SIZE` limit when reading

`HttpRequest.body`, allowing remote attackers to load an unbounded request body into

memory.

Earlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected.

Django would like to thank Superior for reporting this issue.