php.net |  support |  documentation |  report a bug |  advanced search |  search howto |  statistics |  random bug |  login

go to bug id or search bugs for

Bug #79906 FILTER_FLAG_NO_RES_RANGE wrong on short IPv6 addresses
Submitted: 2020-07-28 12:05 UTC Modified: 2021-08-05 15:58 UTC
Votes:1
Avg. Score:5.0 ± 0.0
Reproduced:1 of 1 (100.0%)
Same Version:1 (100.0%)
Same OS:1 (100.0%)
From: os at tnys-welt dot de Assigned: cmb (profile)
Status: Duplicate Package: Filter related
PHP Version: 7.4.8 OS: all
Private report: No CVE-ID: None
View Developer Edit
Welcome back! If you're the original bug submitter, here's where you can edit the bug or add additional notes.
If you forgot your password, you can retrieve your password here.
Password:
Status:
Package:
Bug Type:
Summary:
From: os at tnys-welt dot de
New email:
PHP Version: OS:

 

 [2020-07-28 12:05 UTC] os at tnys-welt dot de 
Description:
------------
The flag FILTER_FLAG_NO_RES_RANGE for IPv6 is working internally with strncasecmp and does not take into account, that IPv6 addresses may be shortened by removing leading zeros.

line 900ff of ext/filter/logical_filters.c:
(Z_STRLEN_P(value) >= 9 &&  !strncasecmp("2001:0db8", Z_STRVAL_P(value), 9)) ||
(Z_STRLEN_P(value) >= 2 &&  !strncasecmp("5f", Z_STRVAL_P(value), 2)) ||
(Z_STRLEN_P(value) >= 4 &&  !strncasecmp("3ff3", Z_STRVAL_P(value), 4)) ||
(Z_STRLEN_P(value) >= 8 &&  !strncasecmp("2001:001", Z_STRVAL_P(value), 8))

Test script:
---------------
<?php

var_dump(filter_var('2001:0db8:0000:08d3:0000:8a2e:0070:7344', FILTER_VALIDATE_IP, FILTER_FLAG_NO_RES_RANGE));
var_dump(filter_var('2001:db8:0:8d3:0:8a2e:70:7344', FILTER_VALIDATE_IP, FILTER_FLAG_NO_RES_RANGE));

Expected result:
----------------
bool(false)
bool(false)

Actual result:
--------------
bool(false)
string(29) "2001:db8:0:8d3:0:8a2e:70:7344"

Patches

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2021-08-05 15:58 UTC] cmb@php.net
-Status: Open +Status: Duplicate -Package: Unknown/Other Function +Package: Filter related -Assigned To: +Assigned To: cmb
 [2021-08-05 15:58 UTC] cmb@php.net 
This is basically a duplicate of bug #61700.
 
PHP Copyright © 2001-2025 The PHP Group
All rights reserved. 		Last updated: Sat Jul 12 09:01:33 2025 UTC