ID: 38687 Updated by: [EMAIL PROTECTED] Reported By: christian dot schuster at s2000 dot tu-chemnitz dot de -Status: Open +Status: Feedback Bug Type: Streams related Operating System: Linux PHP Version: 5CVS-2006-09-01 (CVS) New Comment:
Thank you for this bug report. To properly diagnose the problem, we need a short but complete example script to be able to reproduce this bug ourselves. A proper reproducing script starts with <?php and ends with ?>, is max. 10-20 lines long and does not require any external resources such as databases, etc. If the script requires a database to demonstrate the issue, please make sure it creates all necessary tables, stored procedures etc. Please avoid embedding huge scripts into the report. Previous Comments: ------------------------------------------------------------------------ [2006-09-02 00:01:24] christian dot schuster at s2000 dot tu-chemnitz dot de Description: ------------ Using stream_socket_client() with a context containing a valid local IPv6 binding address does not actually bind the socket to that address, but fails silently. This is a "side effect" of a possible buffer overflow: In main/network.c, php_network_connect_socket_to_host() uses a "struct sockaddr", and references it via a pointer to "struct sockaddr_in" or "struct sockaddr_in6". For IPv4, this is usually sufficient - for IPv6 it is not. Upon the subsequent call to inet_pton(), some memory beyond the "struct sockaddr" is accessed. A "struct sockaddr_in" or "struct sockaddr_in6" should be used instead, depending on the protocol. PHP6 is affected by this bug, too. Proposed patch: http://www-user.tu-chemnitz.de/~chschu/patches/php-stream_socket_client-bind.patch Reproduce code: --------------- /* sample code for illegal use of struct sockaddr */ #include <sys/types.h> #include <sys/socket.h> #include <arpa/inet.h> int main(int, char**) { struct sockaddr local_address; struct sockaddr_in6 *in6 = (struct sockaddr_in6*)&local_address; inet_pton(AF_INET6, "::1", &in6->sin6_addr); } Expected result: ---------------- Normal program termination. Actual result: -------------- "Segmentation fault" on inet_pton(). ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=38687&edit=1
