Bug #71563 [NEW]: Buffer Overrun in curl_exec() causing hang
From: paul at salesintel dot com
Operating system: Windows 10 x64
PHP version: 7.0.3
Package: cURL related
Bug Type: Bug
Bug description:Buffer Overrun in curl_exec() causing hang
Description:
------------
When a couple of cURL options are set in a specific and valid way,
curl_exec() never returns and PHP does not throw any exception, causing
indefinite hang.
Same code in php 5.6.x (in each x32/x64 ts/nts) worked as expected.
In php 7.0.3 (x32/x64 nts, ts not tried) hang occurs.
Test script:
---------------
<?php
repo();
function repo() {
$location = 'https://mail.microsoft.com/ews/exchange.asmx';
$request =
"0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567!
8901234567890123456789012345678901234";
$ch = curl_init($location);
curl_setopt($ch, CURLOPT_POSTFIELDS, $request);
curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_BASIC | CURLAUTH_NTLM);
curl_setopt($ch, CURLOPT_USERPWD, ' ');
$response = curl_exec($ch);
}
Expected result:
----------------
Call to curl_exec($ch) returns.
Actual result:
--------------
Call to curl_exec($ch) never returns.
However....
If you change $location to an invalid endpoint or one that does not
require NTLM, curl_exec() returns.
If you remove the 'CURLAUTH_BASIC' leaving only 'CURLAUTH_NTLM',
curl_exec() returns;
If you remove 'CURLAUTH_NTLM' leaving only 'CURLAUTH_BASIC', curl_exec()
returns;
If you set an empty string ('') instead of one with one or more
characters to CURLOPT_USERPWD, curl_exec() returns.
$request is a string with 1025 characters. If you remove one character,
leaving a (suspiciously sized) 1024 character length $request,
curl_exec($ch) returns.
--
Edit bug report at https://bugs.php.net/bug.php?id=71563&edit=1
--
Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=71563&r=trysnapshot54
Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=71563&r=trysnapshot55
Try a snapshot (trunk): https://bugs.php.net/fix.php?id=71563&r=trysnapshottrunk
Fixed in SVN: https://bugs.php.net/fix.php?id=71563&r=fixed
Fixed in release: https://bugs.php.net/fix.php?id=71563&r=alreadyfixed
Need backtrace: https://bugs.php.net/fix.php?id=71563&r=needtrace
Need Reproduce Script: https://bugs.php.net/fix.php?id=71563&r=needscript
Try newer version: https://bugs.php.net/fix.php?id=71563&r=oldversion
Not developer issue: https://bugs.php.net/fix.php?id=71563&r=support
Expected behavior: https://bugs.php.net/fix.php?id=71563&r=notwrong
Not enough info: https://bugs.php.net/fix.php?id=71563&r=notenoughinfo
Submitted twice: https://bugs.php.net/fix.php?id=71563&r=submittedtwice
register_globals: https://bugs.php.net/fix.php?id=71563&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=71563&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=71563&r=dst
IIS Stability: https://bugs.php.net/fix.php?id=71563&r=isapi
Install GNU Sed: https://bugs.php.net/fix.php?id=71563&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=71563&r=float
No Zend Extensions: https://bugs.php.net/fix.php?id=71563&r=nozend
MySQL Configuration Error: https://bugs.php.net/fix.php?id=71563&r=mysqlcfg
Thread (3 messages)
- paul at salesintel dot com