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
EPSS: 0.316 (98.1th percentile) — read the EPSS interpretation.
Affected products
- Microsoft Windows_server_2008 — versions sp2
- Microsoft Windows_vista
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secure@microsoft.com (x_refsource_MS, vendor-advisory)
- secure@microsoft.com (US Government Resource, x_refsource_CERT, third-party-advisory)
- secure@microsoft.com (signature, x_refsource_OVAL, vdb-entry)
- secure@microsoft.com (vdb-entry, x_refsource_SECTRACK)
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.