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Bug #43410 SNMP cause "PHP has encountered an Access Violation" when wrong IP or CommStr
Submitted: 2007-11-26 11:50 UTC Modified: 2011-09-02 20:27 UTC
Votes:2
Avg. Score:4.0 ± 1.0
Reproduced:1 of 1 (100.0%)
Same Version:1 (100.0%)
Same OS:1 (100.0%)
From: andy_wolk at mail dot ru Assigned:
Status: No Feedback Package: SNMP related
PHP Version: 5.2.5 OS: Windows 2003 Server Enterprise
Private report: No CVE-ID: None
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 [2007-11-26 11:50 UTC] andy_wolk at mail dot ru 
Description:
------------
SNMP functions cause "PHP has encountered an Access Violation" when wrong IP or Community String.

IIS 6 + PHP5.2.2dev isapi module.
PHP_snmp.dll (ver 5.2.2.2)
All next php versions has the same problem.

After this error, IIS does not can operate with snmp module and needs to be restarted.

Event viewer: Faulting application w3wp.exe, version 6.0.3790.3959, faulting module unknown, version 0.0.0.0, fault address 0x010cfdf4.

No errors in php_error.log


Reproduce code:
---------------
<html>

<head>
  <title></title>
</head>

<body>

<?php
 echo "Start...";
 flush();
 $communitystring=''; // Your device must have this string no empty!
 $ip='10.200.202.97'; // Sometimes this error occured, when there is no Device in a network with this IP.
 for ($i=1;$i<14;$i++)
  {
   $port=100+$i;
   $oid='.1.3.6.1.2.1.26.2.1.1.5.${port}.1';
   @snmpget($ip,$communitystring,$oid);
   $oid='.1.3.6.1.2.1.26.2.1.1.5.${port}.1';
   @snmpwalk($ip,$communitystring,$oid);

   $oid='.1.3.6.1.2.1.2.2.1.7.${port}';
   @snmpget($ip,$communitystring,$oid);
   $oid='.1.3.6.1.2.1.2.2.1.7.${port}';
   @snmpwalk($ip,$communitystring,$oid);

   $oid='.1.3.6.1.4.1.43.10.22.1.1.3.1.$i';
   @snmpget($ip,$communitystring,$oid);
   $oid='.1.3.6.1.4.1.43.10.22.1.1.3.1.$i';
   @snmpwalk($ip,$communitystring,$oid);

   $oid='.1.3.6.1.4.1.43.10.22.1.1.5.1.$i';
   @snmpget($ip,$communitystring,$oid);
   $oid='.1.3.6.1.4.1.43.10.22.1.1.5.1.$i';
   @snmpwalk($ip,$communitystring,$oid);

   $oid='.1.3.6.1.2.1.26.2.1.1.3.${port}.1';
   @snmpget($ip,$communitystring,$oid);
   $oid='.1.3.6.1.2.1.26.2.1.1.3.${port}.1';
   @snmpwalk($ip,$communitystring,$oid);
  }
 echo "Finish";

?>

</body>

</html>

Expected result:
----------------
Start...Finish

Actual result:
--------------
Start...PHP has encountered an Access Violation at xxxxxxxx

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History

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 [2008-10-21 12:06 UTC] jani@php.net 
Please try using this CVS snapshot:

  http://snaps.php.net/php5.2-latest.tar.gz
 
For Windows:

  http://windows.php.net/snapshots/

Do not paste such huge texts here. Put them somewhere in net (like http://phpfi.com/) where we can check them out.
 [2008-10-29 01:00 UTC] php-bugs at lists dot php dot net 
No feedback was provided for this bug for over a week, so it is
being suspended automatically. If you are able to provide the
information that was originally requested, please do so and change
the status of the bug back to "Open".
 [2010-09-14 08:29 UTC] andy_wolk at mail dot ru 
Still got the problem. We use the latest 5.2.x version as isapi. But no luck.
I think we are not alone. Check this out (a post from Mar 2010)http://stackoverflow.com/questions/154290/php-access-violation/2482839#2482839
 [2010-09-14 10:55 UTC] pajoye@php.net
-Status: No Feedback +Status: Feedback
 [2010-09-14 10:55 UTC] pajoye@php.net 
Please try using this snapshot:

  http://snaps.php.net/php5.3-latest.tar.gz
 
For Windows:

  http://windows.php.net/snapshots/
 [2011-09-02 20:27 UTC] lytboris@php.net
-Status: Feedback +Status: No Feedback
 
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