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Best critize article about GreenDumb I ever seen
niufangxing
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6-17-2009 10:30 PM
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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/b799c32a-15eb-4b7b-a560-6c35a54a727e/7D2C7E4E-3AB8-4A19-87DB-C5470C860CBF/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://blog.devep.net/virushuo/2009/06/15/post_66.html" href="http://blog.devep.net/virushuo/2009/06/15/post_66.html" style="font-size: 11px;">blog.devep.net</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://blog.devep.net/virushuo/2009/06/15/post_66.html"><H3 class="entry-header"><A href="http://blog.devep.net/virushuo/2009/06/15/post_66.html">绿坝的技术错误及其可能导致的后果</A></H3></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://blog.devep.net/virushuo/2009/06/15/post_66.html"><P>2 缓冲区溢出的问题必须要重视。</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://blog.devep.net/virushuo/2009/06/15/post_66.html"><P>到目前为止,密歇根大学提出的缓冲区溢出漏洞没有被修正。而根据电脑报文章,用户在正常使用中时而会导致浏览器崩溃。这大概也是溢出的迹象。在我的周末的简单研究中,觉得确实如密歇根大学报告所说"使用了较陈旧的编程方法",系统中存在缓冲区溢出的机会大大增加。</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://blog.devep.net/virushuo/2009/06/15/post_66.html"><P>缓冲区溢出并非让程序崩溃退出那么简单,事实上利用这种漏洞是可以完全控制一台计算机的。历史上几次大的病毒传播,比如nimda,比如红色代码,都是缓冲区溢出引起的。缓冲区溢出不仅困扰小公司,对微软这种大公司也是巨大的安全威胁。但是像绿坝这样,把漏洞百出的代码做最广泛的推广和强制安装,实在是匪夷所思。如果真的这么推广下去,真的都安装了,未来还不知道出什么事。</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://blog.devep.net/virushuo/2009/06/15/post_66.html"><P>总结:一般来说,大规模安装的软件要特别注意安全问题。最有效的办法是降低自己的权限,那么就算出现问题也不至于影响太大。但是绿坝反而用不正当的方式获得了很高权限。而高权限的软件则要至少能保证自己的安全,绿坝显然也做不到这点,绿坝调用各种dll并没有做校验,这都是非常容易被利用的。</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://blog.devep.net/virushuo/2009/06/15/post_66.html"><P>说到担心计算机被政府控制用来限制言论自由的观点,我觉得也不用太在意。事实上,所有政府都希望做到这事,但在操作上是如此的不具备操作性。如韩寒所说,计算机上有个东西叫做键盘。这就决定了不可能有超越用户存在的软件,哪怕是最厉害的病毒。一个试图当上帝的程序,最后的命运往往是去见上帝。</P></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;"> </td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/7D2C7E4E-3AB8-4A19-87DB-C5470C860CBF/blog/" title="blog or email this clip"><img src="http://content9.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>
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