THREATPORT/VULNERABILITY/CVE-2009-2505
HIGH SEVERITY

CVE-2009-2505

Windows Server 2008 vulnerability

CVSS
10.0
EPSS
31.6%
EPSS pct
98th
Exploited
No known
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."
Affected vendor
Microsoft
Affected product
Windows Server 2008
CVSS vector
AV:N/AC:L/Au:N/C:C/I:C/A:C
Weakness type (CWE)
  • CWE-287 — Improper Authentication
Published
2009-12-09

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no authentication. Successful exploitation leads to complete impact to confidentiality, complete impact to integrity, complete impact to availability.

Its EPSS score of 31.6% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 98% of all scored CVEs.

Check your external exposure to CVE-2009-2505

  • Confirm whether Microsoft Windows Server 2008 is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2009-2505.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2009-2505

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2009-2505 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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