CVE-2009-3677
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
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Microsoft | Windows 2000 | All versions | Sp4 |
| Microsoft | Windows Server 2003 | All versions | Sp2 |
| Microsoft | Windows Server 2008 | All versions | — |
| Microsoft | Windows Vista | All versions | — |
| Microsoft | Windows Xp | All versions | Sp2 |
References
- http://www.us-cert.gov/cas/techalerts/TA09-342A.htmlUS Government Resource
- http://www.us-cert.gov/cas/techalerts/TA09-342A.htmlUS Government Resource
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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