CVE-2009-2509

Description

Active Directory Federation Services (ADFS) in Microsoft Windows Server 2003 SP2 and Server 2008 Gold and SP2 does not properly validate headers in HTTP requests, which allows remote authenticated users to execute arbitrary code via a crafted request to an IIS web server, aka "Remote Code Execution in ADFS Vulnerability."

Category

9.0
CVSS
Severity: Critical
CVSS 2.0 •
EPSS 28.93% Top 5%
Vendor Advisory microsoft.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6441 vdb entry signature
http://www.us-cert.gov/cas/techalerts/TA09-342A.html third party advisory us government resource
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-070 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2009-2509?
CVE-2009-2509 has been scored as a critical severity vulnerability.
How to fix CVE-2009-2509?
To fix CVE-2009-2509, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2009-2509 being actively exploited in the wild?
It is possible that CVE-2009-2509 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~29% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.