#40273 [NEW]: System slow down in php 5.2.0

From: Jenei dot Viktor dot Attila at stud dot u-szeged dot hu Operating system: Win32, Linux PHP version: 5.2.0 PHP Bug Type: Performance problem Bug description: System slow down in php 5.2.0 Description: ------------ In the bcmatch module can found a function called bcpow. If you called this with a big exponent, the compute will take a long. If you load this script many times, the system will hang up. The set_time_limit value don't help, because it is not an interpreted code. This code only usefull, if the attacker want to reboot/halt the server by the administrator. Reproduce code: --------------- denial_of_service.php: <?php echo bcpow(9,9999999); ?> -- Edit bug report at http://bugs.php.net/?id=40273&edit=1 -- Try a CVS snapshot (PHP 4.4): http://bugs.php.net/fix.php?id=40273&r=trysnapshot44 Try a CVS snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=40273&r=trysnapshot52 Try a CVS snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=40273&r=trysnapshot60 Fixed in CVS: http://bugs.php.net/fix.php?id=40273&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=40273&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=40273&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=40273&r=needscript Try newer version: http://bugs.php.net/fix.php?id=40273&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=40273&r=support Expected behavior: http://bugs.php.net/fix.php?id=40273&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=40273&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=40273&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=40273&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=40273&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=40273&r=dst IIS Stability: http://bugs.php.net/fix.php?id=40273&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=40273&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=40273&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=40273&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=40273&r=mysqlcfg