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Vulnerability Details : CVE-2009-3677

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."
Publish Date : 2009-12-09 Last Update Date : 2010-08-21
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- CVSS Scores & Vulnerability Types

CVSS Score
10.0
Confidentiality Impact Complete (There is total information disclosure, resulting in all system files being revealed.)
Integrity Impact Complete (There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the entire system being compromised.)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Bypass a restriction or similar
CWE ID 255

- Related OVAL Definitions

Title Definition Id Class Family
MS-CHAP Authentication Bypass Vulnerability oval:org.mitre.oval:def:6209 windows
MS09-071: Vulnerabilities in Internet Authentication Service Could Allow Remote Code Execution (974318) oval:gov.nist.fdcc.patch:def:11632 windows
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2009-3677

# Product Type Vendor Product Version Update Edition Language
1 OS Microsoft Windows 2000 SP4 Version Details Vulnerabilities
2 OS Microsoft Windows Server 2003 SP2 X64 Version Details Vulnerabilities
3 OS Microsoft Windows Server 2003 SP2 Itanium Version Details Vulnerabilities
4 OS Microsoft Windows Server 2003 SP2 Version Details Vulnerabilities
5 OS Microsoft Windows Server 2008 X64 Version Details Vulnerabilities
6 OS Microsoft Windows Server 2008 X32 Version Details Vulnerabilities
7 OS Microsoft Windows Server 2008 Itanium Version Details Vulnerabilities
8 OS Microsoft Windows Vista SP1 X64 Version Details Vulnerabilities
9 OS Microsoft Windows Vista SP1 Version Details Vulnerabilities
10 OS Microsoft Windows Vista X64 Version Details Vulnerabilities
11 OS Microsoft Windows Vista Version Details Vulnerabilities
12 OS Microsoft Windows Xp - SP2 X64 Version Details Vulnerabilities
13 OS Microsoft Windows Xp SP2 Version Details Vulnerabilities
14 OS Microsoft Windows Xp SP3 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Microsoft Windows 2000 1
Microsoft Windows Server 2003 3
Microsoft Windows Server 2008 3
Microsoft Windows Vista 4
Microsoft Windows Xp 3

- References For CVE-2009-3677

http://technet.microsoft.com/en-us/security/bulletin/ms09-071
Microsoft Security Bulletin MS09-071 Vulnerabilities in Internet Authentication Service Could Allow Remote Code Execution (974318) This security update resolves two privately reported vulnerabilities in Microsoft Windows. The more severe of these vulnerabilities could allow remote code execution if messages received by the Internet Authentication Service server are copied incorrectly into memory when handling PEAP authentication attempts. On Windows Server 2008, the Internet Authentication Service is replaced by Network Policy Server (NPS). An attacker who successfully exploited either of these vulnerabilities could take complete control of an affected system. Servers using Internet Authentication Service or Network Policy Server are only affected when using PEAP with MS-CHAP v2 authentication.
http://www.securitytracker.com/id?1023291
SECTRACK 1023291
http://www.us-cert.gov/cas/techalerts/TA09-342A.html
CERT TA09-342A

- Metasploit Modules Related To CVE-2009-3677

There are not any metasploit modules related to this vulnerability (Please visit www.metasploit.com for more information)


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