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CVE-2024-27086— MSAL.NET applications targeting Xamarin Android and .NET Android (MAUI) susceptible to local denial of service

Quick assessment

Affected
AzureAD microsoft-authentication-library-for-dotnet
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Microsoft Authentication Library（MSAL）是美国微软（Microsoft）公司的是一个身份验证库。 Microsoft Authentication Library 存在安全漏洞，该漏洞源于MSAL.NET 应用程序容易受到身份验证流中的本地拒绝服务的影响。受影响的产品和版本：Microsoft-Authentication-Library-for-dotnet 4.48.0至4.59.1之前版本，4.60.0至4.60.3之前版本。

CVSS 3.9 · Low EPSS 0.19% · P8

Possible ATT&CK Techniques 1 AI

T1562.008
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I. Basic Information for CVE-2024-27086

Vulnerability Information
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Vulnerability Title
MSAL.NET applications targeting Xamarin Android and .NET Android (MAUI) susceptible to local denial of service
Source: CVE Program / CVE List V5
Vulnerability Description
The MSAL library enabled acquisition of security tokens to call protected APIs. MSAL.NET applications targeting Xamarin Android and .NET Android (e.g., MAUI) using the library from versions 4.48.0 to 4.60.0 are impacted by a low severity vulnerability. A malicious application running on a customer Android device can cause local denial of service against applications that were built using MSAL.NET for authentication on the same device (i.e., prevent the user of the legitimate application from logging in) due to incorrect activity export configuration. MSAL.NET version 4.60.1 includes the fix. As a workaround, a developer may explicitly mark the MSAL.NET activity non-exported.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-926
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Authentication Library 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Authentication Library（MSAL）是美国微软（Microsoft）公司的是一个身份验证库。 Microsoft Authentication Library 存在安全漏洞，该漏洞源于MSAL.NET 应用程序容易受到身份验证流中的本地拒绝服务的影响。受影响的产品和版本：Microsoft-Authentication-Library-for-dotnet 4.48.0至4.59.1之前版本，4.60.0至4.60.3之前版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
AzureAD microsoft-authentication-library-for-dotnet >= 4.48.0, < 4.59.1 -

II. Public POCs for CVE-2024-27086

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III. Intelligence Information for CVE-2024-27086

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Patches & Fixes for CVE-2024-27086 (1)

Vendor Advisories for CVE-2024-27086 (1)

IV. Related Vulnerabilities

Same vendor: AzureAD
Same weakness: CWE-926

V. Comments for CVE-2024-27086

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