ͨ¹ý¶ÔphpһЩ·þÎñÆ÷¶ËÌØÐÔµÄÅäÖüÓÇ¿phpµÄ°²È«

ͨ¹ý¶ÔphpÒ»Ð(C)*þÎñÆ÷¶ËÌØÐÔµÄÅaÖüÓÇ¿phpµÄ°²È«

by san@xfocus.org

Ç°ÃaeÏoShaun ClowesºÍrfpµÈ¶¼±È½ÏÏeϸµÄ½eÉÜÁËphp¡¢cgi³ÌÐoÔÚ±a³Ì¹ý³ÌÖÐÓoµ½µÄÎÊÌa£¬ÒÔ¼°ÈçºÎͨ
¹ýÓ¦ÓóÌÐoÂ(C)¶´Í»ÆÆϵͳ£¬ÕaƪÎÄÕÂÎÒÃÇÀ´Í¨¹ý¶ÔphpµÄÒ»Ð(C)þÎñÆ÷¶ËÌØÐÔÀ´½øÐÐÅaÖüÓÇ¿phpµÄ°²È«¡£Ð´
cgi½Å±¾µÄʱºoÎÒÃǵÄÈÒ»¶¨×¢Òa¸÷ÖÖ°²È«ÎÊÌa£¬¶ÔÓû§ÊaÈe½øÐÐÑϸñµÄ¹ýÂË£¬µ«Êdz£ÔÚ°¶±ß×ßÄÄÓв»ÊªÐ¬
£¬³ÔÉÕ±ýÄÄÓв»µoÖ¥Âe£¬ÈËÓÐʧÌaÂiÓÐʧÊÖ£¬Á¬ÖøÃuµÄphpnuke¡¢phpMyAdminµÈ³ÌÐo¶¼³oÏÖ¹ýºÜÑÏÖصÄ
ÎÊÌa£¬¸uºÎ¿oÏoÎÒµÈС»i»iдµÄ½Å±¾¡£ËuÒÔÏÖÔÚÎÒÃǼÙÉephp½Å±¾ÒѾ­³oÏÖÑÏÖØÎÊÌa£¬±ÈÈçÏoÇ°Ò»Õo×Ó
phpnukeµÄ¿ÉÒÔÉÏ´«php½Å±¾µÄ´oÎÊÌaÁË£¬ÎÒÃÇÈçºÎͨ¹ý¶Ô*þÎñÆ÷µÄÅaÖÃʹ½Å±¾³oÏÖÈç´ËÎÊÌaÒ²²»ÄÜÍ»ÆÆ
ϵͳ¡£

1¡¢±aÒeµÄʱºo×¢Òa²¹ÉÏÒÑÖªµÄÂ(C)¶´
£ ´Ó4.0.5¿ªÊ¼£¬phpµÄmailº¯Êý¼ÓÈeÁ˵ÚÎa¸o²ÎÊý£¬µ«ËuûÓкúùýÂË£¬Ê¹µÃphpÓ¦ÓóÌÐoÄÜÍ»ÆÆ
£ safe_modeµÄÏÞÖƶøÈ¥Ö´ÐÐÃuÁi¡£ËuÒÔʹÓÃ4.0.5ºÍ4.0.6µÄʱºoÔÚ±aÒeÇ°ÎÒÃÇÐeÒªÐÞ¸ÄphpÔ´Âe°uÀi
£ ext/standard/mail.cÎļþ£¬½uÖ¹mailº¯ÊýµÄµÚÎa²ÎÊý»o¹ýÂËshell×Ö*u¡£ÔÚmail.cÎļþµÄµÚ152
£ ÐУ¬Ò²¾ÍÊÇÏÂÃaeÕaÐУº
£ if (extra_cmd != NULL) {
£ ºoÃae¼ÓÉÏextra_cmd=NULL;»oextra_cmd = php_escape_shell_cmd(extra_cmd);È»ºo±aÒephp
£ ÄÇôÎÒÃǾÍÐÞ²¹ÁËÕa¸oÂ(C)¶´¡£

2¡¢ÐÞ¸Äphp.iniÅaÖÃÎļþ
£ ÒÔphp¢ÐаaeµÄphp.ini-distΪÀ¶±¾½øÐÐÐ޸ġ£
£ 1)Error handling and logging
£ £ ÔÚError handling and logging²¿Ö¿ÉÒÔ×oÒ»Ð(C)Ée¶¨¡£ÏÈÕÒµ½£º
£ £ display_errors = On
£ £ phpȱʡÊÇ´o¿ª´iÎoÐÅÏ¢ÏÔʾµÄ£¬ÎÒÃÇ°ÑËu¸ÄΪ£º
£ £ display_errors = Off
£ £ ¹Ø±Õ´iÎoÏÔʾºo£¬phpº¯ÊýÖ´ÐдiÎoµÄÐÅÏ¢½«²»»aÔÙÏÔʾ¸øÓû§£¬ÕaÑuÄÜÔÚÒ»¶¨³Ì¶ÈÉÏÀÖ¹¹¥»÷Õß´Ó
£ £ ´iÎoÐÅÏ¢µÃÖª½Å±¾µÄÎiÀiλÖã¬ÒÔ¼°Ò»Ð(C)ÆaËuÓÐÓõÄÐÅÏ¢£¬ÆðÂe¸ø¹¥»÷ÕߵĺÚÏa¼i²aÔi³ÉÒ»¶¨µÄÕÏ°­
£ £ ¡£ÕaÐ(C)´iÎoÐÅÏ¢¿ÉÄܶÔÎÒÃÇ×Ô¼ºÓÐÓ㬿ÉÒÔÈÃËuдµ½Ö¸¶¨ÎļþÖÐÈ¥£¬ÄÇôÐÞ¸ÄÒÔÏ£º
£ £ log_errors = Off
£ £ ¸ÄΪ£º
£ £ log_errors = On
£ £ ÒÔ¼°Ö¸¶¨Îļþ£¬ÕÒµ½ÏÂÃaeÕaÐУº
£ £ ;error_log = filename
£ £ È¥µoÇ°ÃaeµÄ;×¢ÊÍ£¬°Ñfilename¸ÄΪָ¶¨Îļþ£¬Èç/usr/local/apache/logs/php_error.log
£ £ error_log = /usr/local/apache/logs/php_error.log
£ £ ÕaÑuËuÓеĴiÎo¶¼»aдµ½php_error.logÎļþÀi¡£
£ 2)Safe Mode
£ £ phpµÄsafe_mode¹¦ÄܶԺܶaº¯Êý½øÐÐÁËÏÞÖÆ»o½uÓÃÁË£¬ÄÜÔںܴo³Ì¶È½a¾ophpµÄ°²È«ÎÊÌa¡£ÔÚ
£ £ Safe Mode²¿ÖÕÒµ½£º
£ £ safe_mode = Off
£ £ ¸ÄΪ£º
£ £ safe_mode = On
£ £ ÕaÑu¾Í´o¿ªÁËsafe_mode¹¦ÄÜ¡£ÏoÒ»Ð(C)ÄÜÖ´ÐÐϵͳÃuÁiµÄº¯Êýshell_exec()ºÍ``±»½uÖ¹£¬ÆaËuµÄÒ»
£ £ Ð(C)Ö´Ðк¯ÊýÈ磺exec(), system(), passthru(), popen()½«±»ÏÞÖÆÖ»ÄÜÖ´ÐÐ
£ £ safe_mode_exec_dirÖ¸¶¨Ä¿Â¼ÏµijÌÐo¡£Èç¹uÄaʵÔÚÊÇÒªÖ´ÐÐÒ»Ð(C)ÃuÁi»o³ÌÐo£¬ÕÒµ½ÒÔÏ£º
£ £ safe_mode_exec_dir =
£ £ Ö¸¶¨ÒªÖ´ÐеijÌÐoµÄÂ*¾¶£¬È磺
£ £ safe_mode_exec_dir = /usr/local/php/exec
£ £ È»ºo°ÑÒªÓõijÌÐo¿½µ½/usr/local/php/execĿ¼Ï£¬ÕaÑu£¬ÏoÉÏÃaeµÄ±»ÏÞÖƵĺ¯Êý»¹ÄÜÖ´ÐиÃĿ¼
£ £ ÀiµÄ³ÌÐo¡£
£ £ ¹ØÓÚ°²È«Ä£Ê½ÏÂÊÜÏÞº¯ÊýµÄÏeϸÐÅÏ¢Çe²e¿´phpÖ÷Õ¾µÄ˵Ã÷£º
£ £ http://www.php.net/manual/en/features.safe-mode.php
£ 3)disable_functions
£ £ Èç¹uÄa¶ÔÒ»Ð(C)º¯ÊýµÄΣº¦ÐÔ²»Ì«Ça³þ£¬¶øÇÒҲûÓÐʹÓã¬Ë÷ÐÔ°ÑÕaÐ(C)º¯Êý½uÖ¹ÁË¡£ÕÒµ½ÏÂÃaeÕaÐУº
£ £ disable_functions =
£ £ ÔÚ¡±=¡°ºoÃae¼ÓÉÏÒª½uÖ¹µÄº¯Êý£¬¶a¸oº¯ÊýÓá±,¡°¸o¿ª¡£

3¡¢ÐÞ¸Ähttpd.conf
£ Èç¹uÄaÖ»ÔÊÐiÄaµÄphp½Å±¾³ÌÐoÔÚwebĿ¼Ài²Ù×÷£¬»¹¿ÉÒÔÐÞ¸Ähttpd.confÎļþÏÞÖÆphpµÄ²Ù×÷Â*¾¶¡£±È
£ ÈçÄaµÄwebĿ¼ÊÇ/usr/local/apache/htdocs£¬ÄÇôÔÚhttpd.confÀi¼ÓÉÏÕaô¼¸ÐУº
£ <Directory /usr/local/apache/htdocs>
£ £ php_admin_value open_basedir /usr/local/apache/htdocs
£
£ ÕaÑu£¬Èç¹u½Å±¾Òª¶ÁÈ¡/usr/local/apache/htdocsÒÔÍaµÄÎļþ½«²»»a±»ÔÊÐi£¬Èç¹u´iÎoÏÔʾ´o¿ªµÄ»°
£ »aÌaʾÕaÑuµÄ´iÎo£º
£ Warning: open_basedir restriction in effect. File is in wrong directory in
£ /usr/local/apache/htdocs/open.php on line 4
£ µÈµÈ¡£

4¡¢¶Ôphp´uÂe½øÐбaÒe
£ Zend¶ÔphpµÄ¹±Ï׺ܴo£¬php4µÄÒýÇae¾ÍÊÇÓÃZendµÄ£¬¶øÇÒËu»¹¿ª¢ÁËZendOptimizerºÍZendEncode
£ µÈÐi¶aphpµÄ¼ÓÇ¿×e¼þ¡£ÓÅ»¯Æ÷ZendOptimizerÖ»ÐeÔÚhttp://www.zend.com×¢²a¾Í¿ÉÒÔÃaѵõ½£¬
£ ÏÂÃae¼¸¸oÊÇÓÃÓÚ4.0.5ºÍ4.0.6µÄZendOptimizer£¬ÎļþÃuÖ±ð¶ÔÓÚ¸÷×ÔµÄϵͳ£º
£ ZendOptimizer-1.1.0-PHP_4.0.5-FreeBSD4.0-i386.tar.gz
£ ZendOptimizer-1.1.0-PHP_4.0.5-Linux_glibc21-i386.tar.gz
£ ZendOptimizer-1.1.0-PHP_4.0.5-Solaris-sparc.tar.gz
£ ZendOptimizer-1.1.0-PHP_4.0.5-Windows-i386.zip
£ ÓÅ»¯Æ÷µÄ°²×°Ç³£½±a£¬°uÀiÃae¶¼ÓÐÏeϸµÄ˵Ã÷¡£ÒÔUNIX°ae±¾µÄΪÀý£¬¿´Ça²Ù×÷ϵͳ£¬°Ñ°uÀiµÄ
£ ZendOptimizer.soÎļþ½aѹµ½Ò»¸oĿ¼£¬¼ÙÉeÊÇ/usr/local/libÏ£¬ÔÚphp.iniÀi¼ÓÉÏÁ½¾a£º
£ zend_optimizer.optimization_level=15
£ zend_extension="/usr/local/lib/ZendOptimizer.so"
£ ¾Í¿ÉÒÔÁË¡£ÓÃphpinfo()¿´µ½Zendͼ±e×o±ßÓÐÏÂÃaeÎÄ×Ö£º
£ with Zend Optimizer v1.1.0, Copyright (c) 1998-2000, by Zend Technologies
£ ÄÇô£¬ÓÅ»¯Æ÷ÒѾ­¹Ò½Ó³É¹¦ÁË¡£
£ µ«ÊDZaÒeÆ÷ZendEncode²¢²»ÊÇÃaѵģ¬ÕaÀiÌa¹(C)¸ø´o¼ÒÒ»¸ohttp://www.PHPease.comµÄÂiÓÂÉe¼ÆµÄ
£ ±aÒeÆ÷Ía¿Ç£¬Èç¹uÓÃÓÚÉÌҵĿµÄ£¬ÇeÓehttp://www.zend.comÁªÏµÈ¡µÃÐi¿ÉЭÒe¡£
£ php½Å±¾±aÒeºo£¬½Å±¾µÄÖ´ÐÐËÙ¶ÈÔo¼Ó²»ÉÙ£¬½Å±¾ÎļþÖ»ÄÜ¿´µ½Ò»¶ÑÂÒÂe£¬Õa½«×eÖ¹¹¥»÷Õß½øÒ»²½ÖÎoþ
£ ÎñÆ÷ÉϵĽű¾³ÌÐo£¬¶øÇÒÔ­ÏÈÔÚphp½Å±¾ÀiÒÔÃ÷ÎÄ´ae´¢µÄ¿ÚÁiÒ²µÃµ½Á˱£ÃÜ£¬ÈçmysqlµÄ¿ÚÁi¡£²»¹ýÔÚþ
£ ÎñÆ÷¶Ë¸Ä½Å±¾¾Í±È½ÏÂe³ÁË£¬»¹ÊDZ¾µØ¸ÄºÃÔÙÉÏ´«°É¡£

5¡¢Îļþ¼°Ä¿Â¼µÄȨÏÞÉeÖÃ
£ webĿ¼Ài³ýÁËÉÏ´«Ä¿Â¼£¬ÆaËuµÄĿ¼ºÍÎļþµÄȨÏÞÒ»¶¨²»ÄÜÈÃnobodyÓû§ÓÐдȨÏÞ¡£ñÔo£¬¹¥»÷Õß¿É
£ ÒÔÐÞ¸ÄÖ÷Ò³Îļþ£¬ËuÒÔwebĿ¼µÄȨÏÞÒ»¶¨ÒªÉeÖúá£
£ »¹ÓУ¬php½Å±¾µÄÊoÖ÷ǧÍo²»ÄÜÊÇroot£¬ÒoΪsafe_mode϶ÁÎļþµÄº¯Êý±»ÏÞÖƳɱ»¶ÁÎļþµÄÊoÖ÷±ØÐe
£ ºÍµ±Ç°Ö´Ðнű¾µÄÊoÖ÷ÊÇÒ»Ñu²ÅÄܱ»¶Á£¬ñÔoÈç¹u´iÎoÏÔʾ´o¿ªµÄ»°»aÏÔʾÖiÈçÒÔϵĴiÎo£º
£ Warning: SAFE MODE Restriction in effect. The script whose uid is 500 is not
£ allowed to access /etc/passwd owned by uid 0 in /usr/local/apache/htdocs/open.php
£ on line 3
£ ÕaÑuÎÒÃÇÄÜÀÖ¹Ði¶aϵͳÎļþ±»¶Á£¬±ÈÈ磺/etc/passwdµÈ¡£
£ ÉÏ´«Ä¿Â¼ºÍÉÏ´«½Å±¾µÄÊoÖ÷Ò²ÒªÉe³ÉÒ»Ñu£¬ñÔo»a³oÏÖ´iÎoµÄ£¬ÔÚsafe_modeÏÂÕaÐ(C)ҪעÒa¡£

6¡¢mysqlµÄÆo¶¯È¨ÏÞÉeÖÃ
£ mysqlҪעÒaµÄÊDz»ÒªÓÃrootÀ´Æo¶¯£¬×iºÃÁiÍa½¨Ò»¸omysqladmÓû§¡£¿ÉÒÔÔÚ/etc/rc.localµÈϵͳ
£ Æo¶¯½Å±¾Ài¼ÓÉÏÒ»¾a£º
£ su mysqladm -c "/usr/local/mysql/share/mysql/mysql.server start"
£ ÕaÑuϵͳÖØÆoºo£¬Ò²»a×Ô¶¯ÓÃmysqladminÓû§Æo¶¯mysql½ø³Ì¡£

7¡¢ÈÕÖ¾Îļþ¼°ÉÏ´«Ä¿Â¼µÄÉoºË¼°
£ ²e¿´ÈÕÖ¾ºÍÈ˵ĶeÐÔÓкܴo¹Øϵ£¬Òª´ÓÄÇô´oµÄÈÕÖ¾ÎļþÀi²eÕÒ¹¥»÷ºÛ¼£ÓÐÐ(C)´oº£ÀÌÕe£¬¶øÇÒҲδ±ØÓС£
£ webÉÏ´«µÄĿ¼ÀiµÄÎļþ£¬Ò²Ó¦¸Ã¾­³£¼i²e£¬Ò²Ði³ÌÐoÓÐÎÊÌa£¬Óû§´«ÉÏÁËÒ»Ð(C)ǨµÄÎļþ£¬±ÈÈçÖ´ÐнÅ
£ ±¾µÈ¡£

8¡¢²Ù×÷ϵͳ×ÔÉiµÄ²¹¶¡
£ Ò»Ñu£¬¸øϵͳ´oÒÑÖªÂ(C)¶´µÄ²¹¶¡ÊÇϵͳ¹ÜÀiÔ±×i»u±¾µÄÖ°Ôð£¬ÕaÒ²ÊÇ×iºoÒ»µÀÀÏß¡£
£
¾­¹ýÒÔÉϵÄÅaÖã¬ËaȻ˵²»ÉϹÌÈo½ðÌÀ£¬µ«ÊÇÒ²ÔÚÏaµ±³Ì¶ÈÉϸø¹¥»÷ÕߵIJaÊÔÔi³ÉºÜ¶aÂe³£¬¼´Ê¹php½Å±¾³Ì
Ðo³oÏֱȽÏÑÏÖصÄÂ(C)¶´£¬¹¥»÷ÕßÒ²ÎÞ¨Ôi³Éʵ¼ÊÐÔµÄÆÆ»µ¡£
Èç¹uÄu»¹Óиu¹Å¹Ö£¬¸u±a̬µÄÅaÖý¨£¬Ï£ÍuÄÜÒ»ÆðÖÏi*ÖÏi£»£(C) £¨³o´¦£ºviphot£(C)