link : http://www.microsoft.com/...ity/bulletin/MS03-007.asp
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CERT Advisory CA-2003-09 Buffer Overflow in Microsoft IIS 5.0
Original issue date: March 17, 2003
Last revised: --
Source: CERT/CC
A complete revision history is at the end of this file.
Systems Affected
* Systems running Microsoft Windows 2000 with IIS 5.0 enabled
Overview
A buffer overflow vulnerability exists in Microsoft IIS 5.0 running on
Microsoft Windows 2000. IIS 5.0 is installed and running by default on
Microsoft Windows 2000 systems. This vulnerability may allow a remote
attacker to run arbitrary code on the victim machine.
An exploit is publicly available for this vulnerability, which
increases the urgency that system administrators apply a patch.
I. Description
IIS 5.0 includes support for WebDAV, which allows users to manipulate
files stored on a web server (RFC2518). A buffer overflow
vulnerability exists in ntdll.dll (a portion of code utilized by the
IIS WebDAV component). By sending a specially crafted request to an
IIS 5.0 server, an attacker may be able to execute arbitrary code in
the Local System security context, essentially giving the attacker
compete control of the system.
Microsoft has issued the following bulletin regarding this
vulnerability:
http://www.microsoft.com/...ault.asp?url=/technet/sec urity/bulletin/ms03-007.asp
This vulnerability has been assigned the identifier CAN-2003-0109 by
the Common Vulnerabilities and Exposures (CVE) group:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0109
II. Impact
Any attacker who can reach a vulnerable web server can gain complete
control of the system and execute arbitrary code in the Local System
security context. Note that this may be significantly more serious
than a simple "web defacement."
III. Solution
Apply a patch from your vendor
A patch is available from Microsoft at
http://microsoft.com/down...9D32AC929B&displaylang=en
Disable vulnerable service
Until a patch can be applied, you may wish to disable IIS. To
determine if IIS is running, Microsoft recommends the following:
Go to Start | Settings | Control Panel | Administrative Tools | Services.
If the World Wide Web Publishing service is listed then IIS
is installed
To disable IIS, run the IIS lockdown tool. This tool is available
here:
http://www.microsoft.com/...lease.asp?ReleaseID=43955
......
and so on
-----BEGIN PGP SIGNED MESSAGE-----
CERT Advisory CA-2003-09 Buffer Overflow in Microsoft IIS 5.0
Original issue date: March 17, 2003
Last revised: --
Source: CERT/CC
A complete revision history is at the end of this file.
Systems Affected
* Systems running Microsoft Windows 2000 with IIS 5.0 enabled
Overview
A buffer overflow vulnerability exists in Microsoft IIS 5.0 running on
Microsoft Windows 2000. IIS 5.0 is installed and running by default on
Microsoft Windows 2000 systems. This vulnerability may allow a remote
attacker to run arbitrary code on the victim machine.
An exploit is publicly available for this vulnerability, which
increases the urgency that system administrators apply a patch.
I. Description
IIS 5.0 includes support for WebDAV, which allows users to manipulate
files stored on a web server (RFC2518). A buffer overflow
vulnerability exists in ntdll.dll (a portion of code utilized by the
IIS WebDAV component). By sending a specially crafted request to an
IIS 5.0 server, an attacker may be able to execute arbitrary code in
the Local System security context, essentially giving the attacker
compete control of the system.
Microsoft has issued the following bulletin regarding this
vulnerability:
http://www.microsoft.com/...ault.asp?url=/technet/sec urity/bulletin/ms03-007.asp
This vulnerability has been assigned the identifier CAN-2003-0109 by
the Common Vulnerabilities and Exposures (CVE) group:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0109
II. Impact
Any attacker who can reach a vulnerable web server can gain complete
control of the system and execute arbitrary code in the Local System
security context. Note that this may be significantly more serious
than a simple "web defacement."
III. Solution
Apply a patch from your vendor
A patch is available from Microsoft at
http://microsoft.com/down...9D32AC929B&displaylang=en
Disable vulnerable service
Until a patch can be applied, you may wish to disable IIS. To
determine if IIS is running, Microsoft recommends the following:
Go to Start | Settings | Control Panel | Administrative Tools | Services.
If the World Wide Web Publishing service is listed then IIS
is installed
To disable IIS, run the IIS lockdown tool. This tool is available
here:
http://www.microsoft.com/...lease.asp?ReleaseID=43955
......
and so on