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The ip2long function in PHP 5.1.4 and earlier may incorrectly validate an arbitrary string and return a valid network IP address, which allows remote attackers to obtain network information and facilitate other attacks, as demonstrated using SQL injection in the X-FORWARDED-FOR Header in index.php in MiniBB 2.0. NOTE: it could be argued that the ip2long behavior represents a risk for security-relevant issues in a way that is similar to strcpy's role in buffer overflows, in which case this would be a class of implementation bugs that would require separate CVE items for each PHP application that uses ip2long in a security-relevant manner.

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PHP ip2long函数SQL注入漏洞

PHP 5.1.4及早期版本中的ip2long函数可能对一个任意字符串没有进行正确验证，并返回一个有效的网络IP地址，利用此漏洞，远程攻击者可获取网络信息，并且助长了其它攻击，如在MiniBB 2.0的index.php脚本中X-FORWARDED-FOR头中使用SQL注入。注意：在某种程度上，ip2long行为代表的安全威胁与串拷贝在缓冲区溢出中扮演的角色相似这一论点还存在争议。在这种情况下，bug的执行对每一个以安全方式使用ip2long的PHP应用程序，都需要独立的CVE。

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