CVE-2024-43484

.NET, .NET Framework, and Visual Studio Denial of Service Vulnerability

Microsoft Security Advisory CVE-2024-43484 | .NET Denial of Service Vulnerability

<a name="executive-summary"></a>Executive summary

Microsoft is releasing this security advisory to provide information about a vulnerability in System.IO.Packaging. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.

The System.IO.Packaging library may allow untrusted inputs to influence algorithmically complex operations, leading to denial of service.

Announcement

Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/328

<a name="mitigation-factors"></a>Mitigation factors

Microsoft has not identified any mitigating factors for this vulnerability.

<a name="affected-packages"></a>Affected Packages

The vulnerability affects any Microsoft .NET Core project if it uses any of affected packages versions listed below

<a name=".NET 9"></a>.NET 9

Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- System.IO.Packaging | >= 9.0.0-preview.1.24080.9, <= 9.0.0-rc.1.24431.7 | 9.0.0-rc.2.24473.5

<a name=".NET 8"></a>.NET 8

Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- System.IO.Packaging | >= 8.0.0-preview.1.23110.8, <= 8.0.0 | 8.0.1

<a name=".NET 6"></a>.NET 6

Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- System.IO.Packaging | >= 6.0.0-preview.1.21102.12, <= 6.0.0 | 6.0.1

Advisory FAQ

<a name="how-affected"></a>How do I know if I am affected?

If you have a runtime or SDK with a version listed, or an affected package listed in affected software or affected packages, you're exposed to the vulnerability.

<a name="how-fix"></a>How do I fix the issue?

• To fix the issue please install the latest version of .NET 8.0 or .NET 6.0. If you have installed one or more .NET SDKs through Visual Studio, Visual Studio will prompt you to update Visual Studio, which will also update your .NET SDKs.
• If you have .NET 6.0 or greater installed, you can list the versions you have installed by running the dotnet --info command. You will see output like the following;

.NET Core SDK (reflecting any global.json):


 Version:   8.0.200
 Commit:    8473146e7d

Runtime Environment:

 OS Name:     Windows
 OS Version:  10.0.18363
 OS Platform: Windows
 RID:         win10-x64
 Base Path:   C:\Program Files\dotnet\sdk\6.0.300\

Host (useful for support):

  Version: 8.0.3
  Commit:  8473146e7d

.NET Core SDKs installed:

  8.0.200 [C:\Program Files\dotnet\sdk]

.NET Core runtimes installed:

  Microsoft.AspAspNetCore.App 8.0.3 [C:\Program Files\dotnet\shared\Microsoft.AspAspNetCore.App]
  Microsoft.AspNetCore.App 8.0.3 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.WindowsDesktop.App 8.0.3 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]


To install additional .NET Core runtimes or SDKs:
  https://aka.ms/dotnet-download

• If you're using .NET 9.0, you should download and install .NET 9.0 RC 2 Runtime or .NET 9.0.100-rc.2.24474.11 SDK (for Visual Studio 2022 v17.12 latest Preview) from https://dotnet.microsoft.com/download/dotnet-core/9.0.
• If you're using .NET 8.0, you should download and install .NET 8.0.10 Runtime or .NET 8.0.110 SDK (for Visual Studio 2022 v17.8) from https://dotnet.microsoft.com/download/dotnet-core/8.0.
• If you're using .NET 6.0, you should download and install .NET 6.0.35 Runtime or .NET 6.0.135 SDK (for Visual Studio 2022 v17.6) from https://dotnet.microsoft.com/download/dotnet-core/6.0.

.NET 8.0 and .NET 6.0…

.NET, .NET Framework, and Visual Studio Denial of Service Vulnerability

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 6.0.135 and .NET Runtime 6.0.35.

Security Fix(es):

• dotnet: System.IO.Packaging - Multiple DoS vectors in use of SortedList (CVE-2024-43484)
• dotnet: Multiple .NET components susceptible to hash flooding (CVE-2024-43483)
• dotnet: Denial of Service in System.Text.Json (CVE-2024-43485)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.Security Fix(es):

• dotnet: System.IO.Packaging - Multiple DoS vectors in use of SortedList (CVE-2024-43484)
• dotnet: Multiple .NET components susceptible to hash flooding (CVE-2024-43483)
• dotnet: Denial of Service in System.Text.Json (CVE-2024-43485)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 6.0.135 and .NET Runtime 6.0.35.

Security Fix(es):

• dotnet: System.IO.Packaging - Multiple DoS vectors in use of SortedList (CVE-2024-43484)
• dotnet: Denial of Service in System.Text.Json (CVE-2024-43485)
• dotnet: Multiple .NET components susceptible to hash flooding (CVE-2024-43483)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.Security Fix(es):

• dotnet: System.IO.Packaging - Multiple DoS vectors in use of SortedList (CVE-2024-43484)
• dotnet: Multiple .NET components susceptible to hash flooding (CVE-2024-43483)
• dotnet: Denial of Service in System.Text.Json (CVE-2024-43485)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 8.0.110 and .NET Runtime 8.0.10.

Security Fix(es):

• dotnet: kestrel: closing an HTTP/3 stream can cause a race condition and lead to remote code execution (CVE-2024-38229)
• dotnet: Multiple .NET components susceptible to hash flooding (CVE-2024-43483)
• dotnet: System.IO.Packaging - Multiple DoS vectors in use of SortedList (CVE-2024-43484)
• dotnet: Denial of Service in System.Text.Json (CVE-2024-43485)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.Security Fix(es):

• dotnet: System.IO.Packaging - Multiple DoS vectors in use of SortedList (CVE-2024-43484)
• dotnet: Multiple .NET components susceptible to hash flooding (CVE-2024-43483)
• dotnet: Denial of Service in System.Text.Json (CVE-2024-43485)
• dotnet: kestrel: closing an HTTP/3 stream can cause a race condition and lead to remote code execution (CVE-2024-38229)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 8.0.110 and .NET Runtime 8.0.10.

Security Fix(es):

• dotnet: kestrel: closing an HTTP/3 stream can cause a race condition and lead to remote code execution (CVE-2024-38229)
• dotnet: Multiple .NET components susceptible to hash flooding (CVE-2024-43483)
• dotnet: System.IO.Packaging - Multiple DoS vectors in use of SortedList (CVE-2024-43484)
• dotnet: Denial of Service in System.Text.Json (CVE-2024-43485)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.Security Fix(es):

• dotnet: System.IO.Packaging - Multiple DoS vectors in use of SortedList (CVE-2024-43484)
• dotnet: Multiple .NET components susceptible to hash flooding (CVE-2024-43483)
• dotnet: Denial of Service in System.Text.Json (CVE-2024-43485)
• dotnet: kestrel: closing an HTTP/3 stream can cause a race condition and lead to remote code execution (CVE-2024-38229)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

.NET, .NET Framework, and Visual Studio Denial of Service Vulnerability

.NET, .NET Framework, and Visual Studio Denial of Service Vulnerability

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 6.0.135 and .NET Runtime 6.0.35.

Security Fix(es):

• dotnet: System.IO.Packaging - Multiple DoS vectors in use of SortedList (CVE-2024-43484)
• dotnet: Multiple .NET components susceptible to hash flooding (CVE-2024-43483)
• dotnet: Denial of Service in System.Text.Json (CVE-2024-43485)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.Security Fix(es):

• dotnet: System.IO.Packaging - Multiple DoS vectors in use of SortedList (CVE-2024-43484)

• dotnet: Multiple .NET components susceptible to hash flooding (CVE-2024-43483)

• dotnet: Denial of Service in System.Text.Json (CVE-2024-43485)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 6.0.135 and .NET Runtime 6.0.35.

Security Fix(es):

• dotnet: System.IO.Packaging - Multiple DoS vectors in use of SortedList (CVE-2024-43484)
• dotnet: Denial of Service in System.Text.Json (CVE-2024-43485)
• dotnet: Multiple .NET components susceptible to hash flooding (CVE-2024-43483)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.Security Fix(es):

• dotnet: System.IO.Packaging - Multiple DoS vectors in use of SortedList (CVE-2024-43484)

• dotnet: Multiple .NET components susceptible to hash flooding (CVE-2024-43483)

• dotnet: Denial of Service in System.Text.Json (CVE-2024-43485)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 8.0.110 and .NET Runtime 8.0.10.

Security Fix(es):

• dotnet: kestrel: closing an HTTP/3 stream can cause a race condition and lead to remote code execution (CVE-2024-38229)
• dotnet: Multiple .NET components susceptible to hash flooding (CVE-2024-43483)
• dotnet: System.IO.Packaging - Multiple DoS vectors in use of SortedList (CVE-2024-43484)
• dotnet: Denial of Service in System.Text.Json (CVE-2024-43485)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.Security Fix(es):

• dotnet: System.IO.Packaging - Multiple DoS vectors in use of SortedList (CVE-2024-43484)

• dotnet: Multiple .NET components susceptible to hash flooding (CVE-2024-43483)

• dotnet: Denial of Service in System.Text.Json (CVE-2024-43485)

• dotnet: kestrel: closing an HTTP/3 stream can cause a race condition and lead to remote code execution (CVE-2024-38229)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 8.0.110 and .NET Runtime 8.0.10.

Security Fix(es):

• dotnet: kestrel: closing an HTTP/3 stream can cause a race condition and lead to remote code execution (CVE-2024-38229)
• dotnet: Multiple .NET components susceptible to hash flooding (CVE-2024-43483)
• dotnet: System.IO.Packaging - Multiple DoS vectors in use of SortedList (CVE-2024-43484)
• dotnet: Denial of Service in System.Text.Json (CVE-2024-43485)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.Security Fix(es):

• dotnet: System.IO.Packaging - Multiple DoS vectors in use of SortedList (CVE-2024-43484)

• dotnet: Multiple .NET components susceptible to hash flooding (CVE-2024-43483)

• dotnet: Denial of Service in System.Text.Json (CVE-2024-43485)

• dotnet: kestrel: closing an HTTP/3 stream can cause a race condition and lead to remote code execution (CVE-2024-38229)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Brennan Conroy discovered that the .NET Kestrel web server did not properly handle closing HTTP/3 streams under certain circumstances. An attacker could possibly use this issue to achieve remote code execution. This vulnerability only impacted .NET8. (CVE-2024-38229)

It was discovered that .NET components designed to process malicious input were susceptible to hash flooding attacks. An attacker could possibly use this issue to cause a denial of service, resulting in a crash. (CVE-2024-43483)

It was discovered that the .NET System.IO.Packaging namespace did not properly process SortedList data structures. An attacker could possibly use this issue to cause a denial of service, resulting in a crash. (CVE-2024-43484)

It was discovered that .NET did not properly handle the deserialization of of certain JSON properties. An attacker could possibly use this issue to cause a denial of service, resulting in a crash. (CVE-2024-43485)