ID CVE-2009-3677
Summary The Internet Authentication Service (IAS) in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista Gold and SP1, and Server 2008 Gold does not properly verify the credentials in an MS-CHAP v2 Protected Extensible Authentication Protocol (PEAP) authentication request, which allows remote attackers to access network resources via a malformed request, aka "MS-CHAP Authentication Bypass Vulnerability."
References
Vulnerable Configurations
  • cpe:2.3:o:microsoft:windows_2000:*:sp4:*:*:*:*:*:*
    cpe:2.3:o:microsoft:windows_2000:*:sp4:*:*:*:*:*:*
  • cpe:2.3:o:microsoft:windows_server_2003:*:sp2:*:*:*:*:*:*
    cpe:2.3:o:microsoft:windows_server_2003:*:sp2:*:*:*:*:*:*
  • cpe:2.3:o:microsoft:windows_server_2008:*:*:itanium:*:*:*:*:*
    cpe:2.3:o:microsoft:windows_server_2008:*:*:itanium:*:*:*:*:*
  • cpe:2.3:o:microsoft:windows_server_2008:*:*:x32:*:*:*:*:*
    cpe:2.3:o:microsoft:windows_server_2008:*:*:x32:*:*:*:*:*
  • cpe:2.3:o:microsoft:windows_server_2008:*:*:x64:*:*:*:*:*
    cpe:2.3:o:microsoft:windows_server_2008:*:*:x64:*:*:*:*:*
  • cpe:2.3:o:microsoft:windows_vista:*:*:*:*:*:*:*:*
    cpe:2.3:o:microsoft:windows_vista:*:*:*:*:*:*:*:*
  • cpe:2.3:o:microsoft:windows_vista:*:*:x64:*:*:*:*:*
    cpe:2.3:o:microsoft:windows_vista:*:*:x64:*:*:*:*:*
  • cpe:2.3:o:microsoft:windows_vista:*:sp1:*:*:*:*:*:*
    cpe:2.3:o:microsoft:windows_vista:*:sp1:*:*:*:*:*:*
  • cpe:2.3:o:microsoft:windows_vista:*:sp1:x64:*:*:*:*:*
    cpe:2.3:o:microsoft:windows_vista:*:sp1:x64:*:*:*:*:*
  • cpe:2.3:o:microsoft:windows_xp:*:sp2:*:*:*:*:*:*
    cpe:2.3:o:microsoft:windows_xp:*:sp2:*:*:*:*:*:*
  • cpe:2.3:o:microsoft:windows_xp:*:sp3:*:*:*:*:*:*
    cpe:2.3:o:microsoft:windows_xp:*:sp3:*:*:*:*:*:*
  • cpe:2.3:o:microsoft:windows_xp:-:sp2:x64:*:*:*:*:*
    cpe:2.3:o:microsoft:windows_xp:-:sp2:x64:*:*:*:*:*
CVSS
Base: 10.0 (as of 26-02-2019 - 14:04)
Impact:
Exploitability:
CWE CWE-94
CAPEC
  • Leverage Executable Code in Non-Executable Files
    An attack of this type exploits a system's trust in configuration and resource files, when the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high. The attack can be directed at a client system, such as causing buffer overrun through loading seemingly benign image files, as in Microsoft Security Bulletin MS04-028 where specially crafted JPEG files could cause a buffer overrun once loaded into the browser. Another example targets clients reading pdf files. In this case the attacker simply appends javascript to the end of a legitimate url for a pdf (http://www.gnucitizen.org/blog/danger-danger-danger/) http://path/to/pdf/file.pdf#whatever_name_you_want=javascript:your_code_here The client assumes that they are reading a pdf, but the attacker has modified the resource and loaded executable javascript into the client's browser process. The attack can also target server processes. The attacker edits the resource or configuration file, for example a web.xml file used to configure security permissions for a J2EE app server, adding role name "public" grants all users with the public role the ability to use the administration functionality. The server trusts its configuration file to be correct, but when they are manipulated, the attacker gains full control.
  • Manipulating User-Controlled Variables
    This attack targets user controlled variables (DEBUG=1, PHP Globals, and So Forth). An attacker can override environment variables leveraging user-supplied, untrusted query variables directly used on the application server without any data sanitization. In extreme cases, the attacker can change variables controlling the business logic of the application. For instance, in languages like PHP, a number of poorly set default configurations may allow the user to override variables.
Access
VectorComplexityAuthentication
NETWORK LOW NONE
Impact
ConfidentialityIntegrityAvailability
COMPLETE COMPLETE COMPLETE
cvss-vector via4 AV:N/AC:L/Au:N/C:C/I:C/A:C
oval via4
accepted 2014-03-17T04:00:25.337-04:00
class vulnerability
contributors
  • name J. Daniel Brown
    organization DTCC
  • name Maria Mikhno
    organization ALTX-SOFT
definition_extensions
  • comment Microsoft Windows 2000 SP4 or later is installed
    oval oval:org.mitre.oval:def:229
  • comment Microsoft Windows XP (x86) SP2 is installed
    oval oval:org.mitre.oval:def:754
  • comment Microsoft Windows XP (x86) SP3 is installed
    oval oval:org.mitre.oval:def:5631
  • comment Microsoft Windows XP x64 Edition SP2 is installed
    oval oval:org.mitre.oval:def:4193
  • comment Microsoft Windows Server 2003 SP2 (x86) is installed
    oval oval:org.mitre.oval:def:1935
  • comment Microsoft Windows Server 2003 SP2 (x64) is installed
    oval oval:org.mitre.oval:def:2161
  • comment Microsoft Windows Server 2003 (ia64) SP2 is installed
    oval oval:org.mitre.oval:def:1442
  • comment Microsoft Windows Vista (32-bit) is installed
    oval oval:org.mitre.oval:def:1282
  • comment Microsoft Windows Vista (32-bit) is installed
    oval oval:org.mitre.oval:def:1282
  • comment Microsoft Windows Vista (32-bit) Service Pack 1 is installed
    oval oval:org.mitre.oval:def:4873
  • comment Microsoft Windows Vista x64 Edition Service Pack 1 is installed
    oval oval:org.mitre.oval:def:5254
  • comment Microsoft Windows Server 2008 (32-bit) is installed
    oval oval:org.mitre.oval:def:4870
  • comment Microsoft Windows Server 2008 (64-bit) is installed
    oval oval:org.mitre.oval:def:5356
  • comment Microsoft Windows Server 2008 (ia-64) is installed
    oval oval:org.mitre.oval:def:5667
  • comment Microsoft Windows Vista (32-bit) Service Pack 1 is installed
    oval oval:org.mitre.oval:def:4873
  • comment Microsoft Windows Vista x64 Edition Service Pack 1 is installed
    oval oval:org.mitre.oval:def:5254
  • comment Microsoft Windows Server 2008 (32-bit) is installed
    oval oval:org.mitre.oval:def:4870
  • comment Microsoft Windows Server 2008 (64-bit) is installed
    oval oval:org.mitre.oval:def:5356
  • comment Microsoft Windows Server 2008 (ia-64) is installed
    oval oval:org.mitre.oval:def:5667
description The Internet Authentication Service (IAS) in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista Gold and SP1, and Server 2008 Gold does not properly verify the credentials in an MS-CHAP v2 Protected Extensible Authentication Protocol (PEAP) authentication request, which allows remote attackers to access network resources via a malformed request, aka "MS-CHAP Authentication Bypass Vulnerability."
family windows
id oval:org.mitre.oval:def:6209
status accepted
submitted 2009-12-09T17:00:00
title MS-CHAP Authentication Bypass Vulnerability
version 69
refmap via4
cert TA09-342A
ms MS09-071
sectrack 1023291
Last major update 26-02-2019 - 14:04
Published 09-12-2009 - 18:30
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