CVE-2009-0091

Description

Microsoft .NET Framework 2.0, 2.0 SP1, and 3.5 does not properly enforce a certain type-equality constraint in .NET verifiable code, which allows remote attackers to execute arbitrary code via (1) a crafted XAML browser application (XBAP), (2) a crafted ASP.NET application, or (3) a crafted .NET Framework application, aka "Microsoft .NET Framework Type Verification Vulnerability."

Category

9.3
CVSS
Severity: Critical
CVSS 2.0 •
EPSS 56.69% Top 5%
Vendor Advisory microsoft.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.us-cert.gov/cas/techalerts/TA09-286A.html third party advisory us government resource
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6451 vdb entry signature
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-061 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2009-0091?
CVE-2009-0091 has been scored as a critical severity vulnerability.
How to fix CVE-2009-0091?
To fix CVE-2009-0091, 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-2009-0091 being actively exploited in the wild?
It is possible that CVE-2009-0091 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~57% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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