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漏洞公告:Mail relaying漏洞转发匿名邮件

答案:

 解决方法:

  1.厂商补丁:

  Microsoft已经为此发布了一个安全公告(MS02-011)以及相应补丁:

  MS02-011:Authentication Flaw Could Allow Unauthorized Users To Authenticate To SMTP Service

  链接:http://www.microsoft.com/technet/security/bulletin/MS02-011.asp

  补丁下载:

  (1)、对Windows 2000系统需先安装以下补丁

  Microsoft Windows 2000 Server, Professional and Advanced Server:

  http://www.microsoft.com/Downloads/details.aspx?displaylang=en&FamilyID=427A3B0A-FF47-4684-8AA3-127EB19EB848

  (2)、对NT4.0系统需先安装SP6a补丁

  http://www.microsoft.com/downloads/details.aspx?FamilyID=e396d059-e402-46ef-b095-a74399e25737&DisplayLang=en

  (3)、请先安装Exchange Server 5.5, Service Pack 4补丁,再安装该漏洞补丁,如下:

  Microsoft Exchange Server 5.5, Service Pack 4

  http://www.microsoft.com/downloads/details.aspx?FamilyId=A9E872EA-54B0-4179-8AE9-5648BFB46459&displaylang=en

  Exchange Server 5.5:

  http://www.microsoft.com/Downloads/Release.asp?ReleaseID=33423

  2.其它解决方法:

  如果您不能立刻安装补丁或者升级,BDNS建议您采取以下措施以降低威胁:

  l 如果您不需要提供SMTP服务,关闭此服务。

  l 对SMTP服务端口进行访问控制,确信只有合法用户能够访问。

  3、EXCHANGE SEVER 5.5 的其它补丁包(根据具体情况选择安装)

  http://www.bluedon.com/download/open.asp?id=3412

  漏洞附加说明:

  发布日期:2002-02-27

  更新日期:2002-03-04

  受影响系统:

  Microsoft Exchange Server 5.5

  - Microsoft Windows NT 4.0 SP6a

  - - Microsoft Windows NT 4.0 SP6

  - - Microsoft Windows NT 4.0 SP5

  - - Microsoft Windows NT 4.0 SP4

  - - Microsoft Windows NT 4.0 SP3

  - - Microsoft Windows NT 4.0 SP2

  - - Microsoft Windows NT 4.0 SP1

  - - Microsoft Windows NT 4.0

  - - Microsoft Windows BackOffice 4.5

  - - Microsoft Windows 2000 SP2

  - - Microsoft Windows 2000 SP1

  - - Microsoft Windows 2000

  - Microsoft Exchange Server 5.5SP1

  - - Microsoft Windows NT 4.0 SP6a

  - - Microsoft Windows NT 4.0 SP6

  - - Microsoft Windows NT 4.0 SP5

  - - Microsoft Windows NT 4.0 SP4 - - Microsoft Windows NT 4.0 SP3

 - - Microsoft Windows NT 4.0 SP2

  - - Microsoft Windows NT 4.0 SP1

  - - Microsoft Windows NT 4.0

  - - Microsoft Windows BackOffice 4.5

  - - Microsoft Windows 2000 SP2

  - - Microsoft Windows 2000 SP1

  - - Microsoft Windows 2000

  - Microsoft Exchange Server 5.5SP2

  - - Microsoft Windows NT 4.0 SP6a

  - - Microsoft Windows NT 4.0 SP6

  - - Microsoft Windows NT 4.0 SP5

  - - Microsoft Windows NT 4.0 SP4

  - - Microsoft Windows NT 4.0 SP3

  - - Microsoft Windows NT 4.0 SP2

  - - Microsoft Windows NT 4.0 SP1

  - Microsoft Windows NT 4.0

  - - Microsoft Windows BackOffice 4.5

  - - Microsoft Windows 2000 SP2

  - - Microsoft Windows 2000 SP1

  - - Microsoft Windows 2000

  - Microsoft Exchange Server 5.5SP3

  - - Microsoft Windows NT 4.0 SP6a

  - - Microsoft Windows NT 4.0 SP6

  - - Microsoft Windows NT 4.0 SP5

  - - Microsoft Windows NT 4.0 SP4

  - - Microsoft Windows NT 4.0 SP3

  - - Microsoft Windows NT 4.0 SP2

  - Microsoft Windows NT 4.0 SP1

  - -Microsoft Windows NT 4.0

  - Microsoft Windows BackOffice 4.5

  - Microsoft Windows 2000 SP2

  - Microsoft Windows 2000 SP1

  - Microsoft Windows 2000

  Microsoft Exchange Server 5.5SP4

  - Microsoft Windows NT 4.0 SP6a

  - Microsoft Windows NT 4.0 SP6

  - Microsoft Windows NT 4.0 SP5

  - Microsoft Windows NT 4.0 SP4

  - Microsoft Windows NT 4.0 SP3

  - Microsoft Windows NT 4.0 SP2

  - Microsoft Windows NT 4.0 SP1

  - Microsoft Windows NT 4.0

  - Microsoft Windows BackOffice 4.5

  - Microsoft Windows 2000 SP2

  - Microsoft Windows 2000 SP1

  - Microsoft Windows 2000

  Microsoft Windows 2000 SMTP Service

  - Microsoft Windows 2000 SP2

  - Microsoft Windows 2000 SP1

  - Microsoft Windows 2000

  漏洞描述:

  CVE(CAN) ID: CAN-2002-0054

  Windows系统的IIS服务器自带了一个SMTP服务器组件。Windows 2000 SMTP服务和Exchange Server 5.5 Internet Mail Connector服务对发信认证的实现上存在漏洞,可以使本地局域网攻击者得到主机的用户级非法访问权限。IIS的SMTP组件支持SMTP AUTH认证命令,它支持NTLM认证选项,目的是允许用户用NTLM认证方式认证自己。然而NTLM支持空会话方式,一个匿名用户可能用这种方式“认证”自己,当这种认证完成以后,用户就被准许转发邮件了。Exchange 2000被证实不受此漏洞影响。

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