为一篇报告文档，利用return-into-libc方法，完成攻击实验，实验环境为Linux（Ubuntu-9.10），内含实验攻击源代码（无害）。-As a report document, the use of return-into-libc method to complete the attack experiments, the experimental environment for the Linux (Ubuntu-9.10), attack the source code containing the experimental (sound).