Bug #67059 [NEW]: String pointer problem in object $_SERVER when using a proxy (buffer overflow)

From: potsky at me dot com Operating system: Mac OS 10.9 PHP version: 5.5.11 Package: Apache2 related Bug Type: Bug Bug description:String pointer problem in object $_SERVER when using a proxy (buffer overflow) Description: ------------ Hi, when using a proxy server between a client and the PHP server, the $_SERVER['SERVER_NAME'] is not set correctly and I think there is a serious pointer problem. Echoing $_SERVER['SERVER_NAME'] tells "potskymac.local:5757" but it tells that the string is 11 chars length. This is wrong of course. Parsing the string char by char returns the name of the internal PHP server dev.musicme instead. This problem has been teste on 5.5.9 and 5.5.11. Test script: --------------- <?php $a = $_SERVER['SERVER_NAME']; var_dump( $a ); var_dump( chr( ord( $a[0] ) ) ); var_dump( chr( ord( $a[1] ) ) ); var_dump( chr( ord( $a[2] ) ) ); var_dump( chr( ord( $a[3] ) ) ); ... var_dump( '' . $_SERVER['SERVER_NAME'] ); die(); Expected result: ---------------- On a direct connection, the result is right and is : string 'potskymac.local' (length=15) string 'p' (length=1) string 'o' (length=1) string 't' (length=1) string 's' (length=1) string 'k' (length=1) string 'y' (length=1) string 'm' (length=1) string 'a' (length=1) string 'c' (length=1) string '.' (length=1) string 'l' (length=1) string 'o' (length=1) string 'c' (length=1) string 'a' (length=1) string 'l' (length=1) It should be the same when using a proxy. Actual result: -------------- When using a proxy, the string is broken with echo, print_r, var_dump, etc... It seems there are 2 pointers for the same string. Just take a look on the cur result, the value is 11 chars length and is my proxy server dev.musicme : string 'potskymac.local:5757' (length=11) string 'd' (length=1) string 'e' (length=1) string 'v' (length=1) string '.' (length=1) string 'm' (length=1) string 'u' (length=1) string 's' (length=1) string 'i' (length=1) string 'c' (length=1) string 'm' (length=1) string 'e' (length=1) ( ! ) Notice: Uninitialized string offset: 11 -- Edit bug report at https://bugs.php.net/bug.php?id=67059&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=67059&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=67059&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=67059&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=67059&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=67059&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=67059&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=67059&r=needscript Try newer version: https://bugs.php.net/fix.php?id=67059&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=67059&r=support Expected behavior: https://bugs.php.net/fix.php?id=67059&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=67059&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=67059&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=67059&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=67059&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=67059&r=dst IIS Stability: https://bugs.php.net/fix.php?id=67059&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=67059&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=67059&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=67059&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=67059&r=mysqlcfg