CVE-2024-27086 json
MSAL.NET applications targeting Xamarin Android and .NET Android (MAUI) susceptible to local denial of service
published 2y ago modified 2mo ago also GHSA-x674-v45j-fwxw , EUVD-2024-1332
- cvss
- 3.9
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 8%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- nuget Microsoft.Identity.Client 4.59.1, 4.60.3
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2y ago
Exploit prediction
0.19% chance of exploitation in the next 30 days, higher than 8% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 3.9 | CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L |
| GitHub | 3.1 | 3.9 | CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| nuget | Microsoft.Identity.Client | >=4.48.0, <4.59.1 >=4.60.0, <4.60.3 |
4.59.1 4.60.3 |
Affected products
- AzureAD microsoft-authentication-library-for-dotnet
Classification
References
-
github.com
/AzureAD/microsoft-authentication-library-for-dotnet/commit/413e319472ccf48c86647f19fa2aa49ff6038488
web
-
github.com
/AzureAD/microsoft-authentication-library-for-dotnet/security/advisories/GHSA-x674-v45j-fwxw
web
-
nvd.nist.gov
/vuln/detail/CVE-2024-27086
advisory
-
github.com
/AzureAD/microsoft-authentication-library-for-dotnet
package
-
learn.microsoft.com
/en-us/entra/msal/dotnet
web
-
nuget.org
/packages/Microsoft.Identity.Client
web
Sources
- CVE List CVE-2024-27086
- GitHub Advisory GHSA-x674-v45j-fwxw
- NVD CVE-2024-27086
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