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Bug #75348 Private/protected property disclosure
Submitted: 2017-10-10 03:58 UTC Modified: 2017-10-10 04:11 UTC
Avg. Score:4.0 ± 1.0
Reproduced:2 of 2 (100.0%)
Same Version:1 (50.0%)
Same OS:2 (100.0%)
From: anrdaemon at freemail dot ru Assigned:
Status: Open Package: *General Issues
PHP Version: 7.2.0RC3 OS: All
Private report: No CVE-ID: None
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 [2017-10-10 03:58 UTC] anrdaemon at freemail dot ru
It is possible to access values (and names to an extent) of all object properties regardless their access level using reset/end/each.

This behavior also prevents the expected behavior from using reset/next/current with clasess implementing Iterator/ArrayAccess interfaces.

Test script:

class MyClass
  private $var1 = 'Some value 1';
  protected $var2 = 'Some value 2';
  protected $var3 = 'Some value 3';

$obj = new MyClass;
foreach($obj as $key => $value)
  print "$key => $value\n";
while($val = each($obj)) print_r($val);

Expected result:
No output.

Actual result:
The class content is dumped from second loop.


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 [2017-10-10 04:06 UTC]
The array pointer functions really should just throw a type error here instead of blindly casting the object to an array. HHVM gets it right, why shouldn't we? I thought we were supposed to more aligned in implementation.
 [2017-10-10 04:11 UTC]
Probably BC, though there's a warning that each() on an object is undefined. And the whole function is deprecated anyways.
 [2017-10-12 00:11 UTC] anrdaemon at freemail dot ru
each() may be deprecated, but reset() and end() still let you access the respective properties of an object.
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