Auth bypass in Microsoft Windows Server 2008
CVE-2009-2505
The Internet Authentication Service (IAS) in Microsoft Windows Vista SP2 and Server 2008 SP2 does not properly validate MS-CHAP v2 Protected Extensible Authentication Protocol (PEAP) authentication requests, which allows remote attackers to execute arbitrary code via crafted structures in a malformed request, aka "Internet Authentication Service Memory Corruption Vulnerability."
Vulnerability class: Broken Authentication
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: 0.316 (98.2th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 98.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.316 · newest: 0.316 · change: 0.000
Affected products
- Microsoft Windows Server 2008 — versions sp2
- Microsoft Windows Vista
Weakness classification (CWE)
Public proof-of-concept exploits
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)
- oval.cisecurity.org/repository/search/definition/oval:org.mitre.oval:def:6063 (signature, vdb-entry)
- www.securitytracker.com/id (vdb-entry)
Frequently asked questions
- What is CVE-2009-2505?
- CVE-2009-2505 is a vulnerability in Microsoft Windows Server 2008, classified under Improper Authentication. Published 2009-12-09.
- Is CVE-2009-2505 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.