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."
Exploit prediction scoring system (EPSS) score for CVE-2009-3677
Probability of exploitation activity in the next 30 days: 89.29%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 99 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2009-3677
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
10.0
|
HIGH | AV:N/AC:L/Au:N/C:C/I:C/A:C |
10.0
|
10.0
|
NIST |
CWE ids for CVE-2009-3677
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The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.Assigned by: nvd@nist.gov (Primary)
-
Assigned by: nvd@nist.gov (Primary)
References for CVE-2009-3677
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https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-071
Microsoft Security Bulletin MS09-071 - Critical | Microsoft Learn
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http://www.us-cert.gov/cas/techalerts/TA09-342A.html
Microsoft Updates for Multiple Vulnerabilities | CISAUS Government Resource
- http://www.securitytracker.com/id?1023291
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https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6209
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Products affected by CVE-2009-3677
- cpe:2.3:o:microsoft:windows_2000:*:sp4:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_xp:*:sp2:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_xp:*:sp3:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_xp:-:sp2:x64:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2003:*:sp2:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_vista:*:*:x64:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_vista:*:*:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_vista:*:sp1:*:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2008:*:*:itanium:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2008:*:*:x64:*:*:*:*:*
- cpe:2.3:o:microsoft:windows_server_2008:*:*:x32:*:*:*:*:*