如果通过认证的攻击者在RSS URL字段中输入了etc/passwd值,应用程序就会生成包含有文件路径字符串的MD5哈希,etc/passwd值哈希为5068b7c2b1707f8939b283a2758a691,然后将这个MD5哈希用作了/etc/passwd文件内容的文件名,这样就可以在http://sugarwebsiteaddress/cache/feeds/c5068b7c2b1707f8939b283a2758a691 公开查看/etc/passwd文件。
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