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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v3.1
Weakness Type (CWE)
References 3
https://github.com/pyload/pyload/blob/8e447958b8a66c5899775e725a8b90bce6643004/…
security-advisories@github.com
https://github.com/pyload/pyload/commit/461cd66f30fa9e96453fb4d8c5c47467e452363c
security-advisories@github.com
https://github.com/pyload/pyload/security/advisories/GHSA-vq8p-m3wm-gv5f
security-advisories@github.com