Vulnerability Monitor

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CVE-2009-2511

Integer overflow in the CryptoAPI component in Microsoft Windows 2000 SP4, Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista Gold, SP1, and SP2, Windows Server 2008 Gold, SP2, and R2, and Windows 7 allows man-in-the-middle attackers to spoof arbitrary SSL servers and other entities via an X.509 certificate that has a malformed ASN.1 Object Identifier (OID) and was issued by a legitimate Certification Authority, aka "Integer Overflow in X.509 Object Identifiers Vulnerability."

Security Impact Summary

CVE-2009-2511 is a security vulnerability that . Impacting 6 products from microsoft, from microsoft, from microsoft and 3 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Originally identified in 2009, this vulnerability predates many modern security frameworks and practices. The vulnerability landscape of that era was characterized by different threat models and less mature defense mechanisms compared to contemporary standards.

Published

2009-10-14T10:30:01.517

Last Modified

2025-04-09T00:30:58.490

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

6.4

Weaknesses

Type: Primary
CWE-189

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	microsoft	windows_2000	*	Yes
Operating System	microsoft	windows_7	-	Yes
Operating System	microsoft	windows_server_2003	*	Yes
Operating System	microsoft	windows_server_2008	*	Yes
Operating System	microsoft	windows_server_2008	*	Yes
Operating System	microsoft	windows_server_2008	*	Yes
Operating System	microsoft	windows_server_2008	*	Yes
Operating System	microsoft	windows_server_2008	*	Yes
Operating System	microsoft	windows_server_2008	*	Yes
Operating System	microsoft	windows_server_2008	*	Yes
Operating System	microsoft	windows_server_2008	*	Yes
Operating System	microsoft	windows_vista	*	Yes
Operating System	microsoft	windows_vista	*	Yes
Operating System	microsoft	windows_vista	*	Yes
Operating System	microsoft	windows_xp	*	Yes
Operating System	microsoft	windows_xp	*	Yes
Operating System	microsoft	windows_xp	*	Yes

References

http://www.us-cert.gov/cas/techalerts/TA09-286A.html US Government Resource ([email protected])
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-056 ([email protected])
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6186 ([email protected])
http://www.us-cert.gov/cas/techalerts/TA09-286A.html US Government Resource (af854a3a-2127-422b-91ae-364da2661108)
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-056 (af854a3a-2127-422b-91ae-364da2661108)
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6186 (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For microsoft's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.