pyLoad: Lack of Input Size Validation Leads to Denial of Service (DoS) and Process Termination

[ Why it matters ]Priority signals

• Public proof-of-concept exploit exists (CISA SSVC)

[ Description ]Official description

pyLoad is a free and open-source download manager written in Python. Prior to 0.5.0b3.dev101, the API `rpc` function in `api_blueprint.py` handles `multipart/form-data` uploads by reading the whole content of the uploaded file into memory with `file.read()`. This occurs before the data is sent to the underlying function. Since there is no size limit set at this point, a large file upload can exhaust the server's available memory which led to process termination. Version 0.5.0b3.dev101 contains a patch.

[ Fixes ]Fixes and patches

• pyload-ng 0.5.0b3.dev101Fixed version · GitHub Advisories · pip package pyload-ng: upgrade to 0.5.0b3.dev101 or later (affected < 0.5.0b3.dev101)

[ Packages ]Affected open-source packages

• pyload-ng pipAffected < 0.5.0b3.dev101 · fixed in 0.5.0b3.dev101 · GHSA-vq8p-m3wm-gv5f

[ References ]References

• github.com/pyload/pyload/blob/8e447958b8a66c5899775e725a8b90bce6643004/src/pyload/webui…
• github.com/pyload/pyload/commit/461cd66f30fa9e96453fb4d8c5c47467e452363c
• github.com/pyload/pyload/security/advisories/GHSA-vq8p-m3wm-gv5f