CVE-2024-29059KEV · OVERDUECWE-209

.NET Framework Information Disclosure Vulnerability

High · published March 22, 2024

Patch now

Confirmed exploited, and the score agrees

CVSS calls it high at 7.5. It is confirmed in active exploitation. It sits in the 99.9th percentile for exploit probability.

606
days past CISA
deadline
CVSS v3.1
7.5
EPSS
99%
Percentile
99.9
In the wild
Confirmed
What it is

⚡ A sneaky information disclosure vulnerability in .NET Framework can spill sensitive data like a leaky faucet! 🚰 Think of it as a hotel manager accidentally revealing guest lists to anyone who asks — all because they skipped the front desk verification. This vulnerability allows attackers to gain access to sensitive information by exploiting the system's oversight. An attacker could exploit this flaw to gain unauthorized access to sensitive information, potentially compromising user privacy and exposing critical data. This could lead to devastating consequences, including identity theft and data leaks that affect not just individuals, but entire organizations.

Put simply

Think of it as a hotel manager accidentally revealing guest lists to anyone who asks — all because they skipped the front desk verification. This vulnerability allows attackers to gain access to sensitive information by exploiting the system's oversight. This information disclosure vulnerability occurs when the .NET Framework improperly handles certain requests, allowing an attacker to infer sensitive information that should remain protected. This can happen if the application fails to adequately validate user inputs or session tokens.

What to do

An attacker could exploit this flaw to gain unauthorized access to sensitive information, potentially compromising user privacy and exposing critical data. This could lead to devastating consequences, including identity theft and data leaks that affect not just individuals, but entire organizations. To mitigate this vulnerability, ensure you're running the latest version of the .NET Framework, specifically patching to version 4.8.1 or higher. Also, review your application’s input validation methods to prevent unauthorized information access and implement proper session management practices. You’ve got this! By following these steps, you’ll strengthen your security posture and keep your users' information safe. 🛡️

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
CVSS v4.0
Not supplied
EPSS
0.98624 · 99.9th percentile
Weakness
CWE-209 · Generation of Error Message Containing Sensitive Information
Published
2024-03-22T23:09Z
KEV added
2025-02-04 · due 2025-02-25
EPSS history
Timeline
  • 04 FEB 00:00Z
    Added to CISA KEV — remediate by Feb 25
    kev
  • 22 MAR 23:09Z
    .NET Framework Information Disclosure Vulnerability
    cvelistv5