RCE in Microsoft Windows 2000
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."
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
CVSS v2 metric
CVSS v2 base score 10.0 (High). Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.218 (97.6th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 97.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.218 · newest: 0.218 · change: 0.000
Affected products
Weakness classification (CWE)
References
- docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-071 (vendor-advisory)
- www.us-cert.gov/cas/techalerts/TA09-342A.html (US Government Resource, third-party-advisory)
- www.securitytracker.com/id (vdb-entry)
- oval.cisecurity.org/repository/search/definition/oval:org.mitre.oval:def:6209 (signature, vdb-entry)