#28754: validate_ipv46_address validator allows IP addresses to begin with a
first
octet of zero
-------------------------------------+-------------------------------------
Reporter: frankston | Owner: (none)
Type: Bug | Status: closed
Component: Core (Other) | Version: 1.11
Severity: Normal | Resolution: invalid
Keywords: IP, regular | Triage Stage:
expression | Someday/Maybe
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
-------------------------------------+-------------------------------------
Changes (by Baptiste Mispelon):
* status: new => closed
* resolution: => invalid
Comment:
* Since #27793, Django's IP address validation is a think wrapper around
Python's `ipaddress` module, we don't use regexps anymore. As far as I can
tell, no issue was ever opened against cpython to request that leading 0
in IP addresses be marked as invalid [1].
* I can't find a reference explaining why IP address starting with 0 would
be invalid (RFC 1700 [2] says they are valid but "can only be used as a
source address"). On my machine, `ping 0.1.2.3` does not give any error.
For these reasons, I'm going to mark this ticket as invalid. Feel free to
reopen if I've missed something or if you disagree.
[1]
https://bugs.python.org/issue?%40search_text=&ignore=file%3Acontent&title=ipaddress&%40columns=title&id=&%40columns=id&stage=&creation=&creator=&activity=&%40columns=activity&%40sort=activity&actor=&nosy=&type=&components=&versions=&dependencies=&assignee=&keywords=&priority=&status=&%40columns=status&resolution=&nosy_count=&message_count=&%40group=&%40pagesize=50&%40startwith=0&%40sortdir=on&%40action=search
[2] https://tools.ietf.org/html/rfc1700#page-4
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Ticket URL: <https://code.djangoproject.com/ticket/28754#comment:8>
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