CVE-2009-0091

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…

published October 14, 2009

CVSS
—
EPSS
26%
Percentile
98.0
In the wild
Unconfirmed
What it is

⚡ A sneaky type-equality flaw in the .NET Framework could let attackers execute code remotely without a user even noticing! 🔥 Think of it like a restaurant with a menu that has mislabeled dishes — a customer orders a salad, but the server mistakenly delivers a spicy dish instead, potentially causing chaos. This vulnerability allows attackers to trick the system into executing unintended code, just like serving the wrong meals! If exploited, this could be a game-changer for attackers, allowing them to run malicious code on unsuspecting users' systems. This means a compromised application could lead to data breaches or unauthorized access, putting sensitive information at serious risk!

Put simply

Think of it like a restaurant with a menu that has mislabeled dishes — a customer orders a salad, but the server mistakenly delivers a spicy dish instead, potentially causing chaos. This vulnerability allows attackers to trick the system into executing unintended code, just like serving the wrong meals! This vulnerability arises from improper enforcement of type-equality constraints in .NET verifiable code, enabling attackers to execute arbitrary code via crafted XAML browser applications (XBAP) or ASP.NET applications.

What to do

If exploited, this could be a game-changer for attackers, allowing them to run malicious code on unsuspecting users' systems. This means a compromised application could lead to data breaches or unauthorized access, putting sensitive information at serious risk! To mitigate this risk, ensure that all systems are updated to the latest versions of the .NET Framework. Regularly review your applications for any dependencies on vulnerable versions and consider employing runtime security measures or code reviews to validate input effectively. You've got this! Follow these steps to shield your applications from potential threats and maintain your security hero status! 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.25811 · 98.0th percentile
Published
2009-10-14T10:00Z
EPSS history
Timeline
  • 14 OCT 10:00Z
    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…
    cvelistv5