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CVE-2009-3677

UnknownEPSS 21.82%

Last modified

CVE-2009-3677 is a vulnerability of currently unknown severity. 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.". EPSS estimates a 21.82% chance of exploitation in the next 30 days.

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."

Metrics

EPSS Probability
21.82%

97.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersionsUpdate
MicrosoftWindows 2000All versionsSp4
MicrosoftWindows Server 2003All versionsSp2
MicrosoftWindows Server 2008All versions—
MicrosoftWindows VistaAll versions—
MicrosoftWindows XpAll versionsSp2

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is 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."
How severe is CVE-2009-3677?
Severity scoring for CVE-2009-3677 is pending analysis. The EPSS model estimates a 21.82% probability of exploitation in the next 30 days.
How do I fix CVE-2009-3677?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2009-3677?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST