poplib.py: Missing integer parsing validation causes client crash on invalid server response

[NErinola]

Crash report

What happened?

In poplib.py at line 229 the code attempts to convert a server response to an integer without first verifying that the response is numeric. If the server returns a non-numeric response, the int() conversion fails causing the client to crash.

CPython versions tested on:

3.12

Operating systems tested on:

Linux

Output from running 'python -VV' on the command line:

No response

Linked PRs

• gh-130637: Add validation for numeric response data in stat() method #130646
• [3.13] gh-130637: Add validation for numeric response data in stat() method (GH-130646) #130763
• [3.12] gh-130637: Add validation for numeric response data in stat() method (GH-130646) #130764

[encukou]

This is a wrong exception (ValueError), not a hard crash, right?