ID: 40706
Updated by: [EMAIL PROTECTED]
Reported By: askold2 at velo dot nsk dot ru
-Status: Open
+Status: Bogus
Bug Type: PCRE related
Operating System: any
PHP Version: 4.4.6
New Comment:
We can't fix PCRE stack overflow (it's not PHP problem anyway), but we
have a workaround for it in PHP5.
Please consider upgrading.
Previous Comments:
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[2007-03-04 13:47:46] bmihelac at mihelac dot org
I have similiar problem both on linux and windows. On windows it
crashes PHP without any error notices. I am not sure if it crash PHP on
linux/unix.
Seems that regex with nested parenthesizes are especially vunerable,
for example:
$pattern = '/"([^"\\\\]*(?:(?:\\\\.)*[^"\\\\]*)*)"/';
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[2007-03-03 15:12:45] askold2 at velo dot nsk dot ru
Description:
------------
the regular expression like ((any text)*(other text)*)* produce the
hang or crash of PHP program. In the previous versions of php all
worked properly.
Reproduce code:
---------------
$subj="sdfgsdg";
if(preg_match('/^((a)*(b)*)*$/',$subj))
echo "match";
else
echo "not match";
Expected result:
----------------
"match" or "not match" printing
Actual result:
--------------
nothing. the hung of script on my unux hosting and breaking program in
windows
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Edit this bug report at http://bugs.php.net/?id=40706&edit=1
