Headline
Ubuntu Security Notice USN-7058-1
Ubuntu Security Notice 7058-1 - 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 Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. 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.
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Ubuntu Security Notice USN-7058-1
October 08, 2024
dotnet6, dotnet8 vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
Summary:
Several security issues were fixed in dotnet6, dotnet8.
Software Description:
- dotnet8: .NET CLI tools and runtime
- dotnet6: .NET CLI tools and runtime
Details:
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 Ubuntu 22.04 LTS and Ubuntu 24.04 LTS.
(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)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 24.04 LTS
aspnetcore-runtime-8.0 8.0.10-0ubuntu1~24.04.1
dotnet-host-8.0 8.0.10-0ubuntu1~24.04.1
dotnet-hostfxr-8.0 8.0.10-0ubuntu1~24.04.1
dotnet-runtime-8.0 8.0.10-0ubuntu1~24.04.1
dotnet-sdk-8.0 8.0.110-0ubuntu1~24.04.1
dotnet8 8.0.110-8.0.10-0ubuntu1~24.04.1
Ubuntu 22.04 LTS
aspnetcore-runtime-6.0 6.0.135-0ubuntu1~22.04.1
aspnetcore-runtime-8.0 8.0.10-0ubuntu1~22.04.1
dotnet-host 6.0.135-0ubuntu1~22.04.1
dotnet-host-8.0 8.0.10-0ubuntu1~22.04.1
dotnet-hostfxr-6.0 6.0.135-0ubuntu1~22.04.1
dotnet-hostfxr-8.0 8.0.10-0ubuntu1~22.04.1
dotnet-runtime-6.0 6.0.135-0ubuntu1~22.04.1
dotnet-runtime-8.0 8.0.10-0ubuntu1~22.04.1
dotnet-sdk-6.0 6.0.135-0ubuntu1~22.04.1
dotnet-sdk-8.0 8.0.110-0ubuntu1~22.04.1
dotnet6 6.0.135-0ubuntu1~22.04.1
dotnet8 8.0.110-8.0.10-0ubuntu1~22.04.1
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-7058-1
CVE-2024-38229, CVE-2024-43483, CVE-2024-43484, CVE-2024-43485
Package Information:
https://launchpad.net/ubuntu/+source/dotnet8/8.0.110-8.0.10-0ubuntu1~24.04.1
https://launchpad.net/ubuntu/+source/dotnet6/6.0.135-0ubuntu1~22.04.1
https://launchpad.net/ubuntu/+source/dotnet8/8.0.110-8.0.10-0ubuntu1~22.04.1
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# Microsoft Security Advisory CVE-2024-43485 | .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.Text.Json 6.0.x and 8.0.x. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. In System.Text.Json 6.0.x and 8.0.x, applications which deserialize input to a model with an `[ExtensionData]` property can be vulnerable to an algorithmic complexity attack resulting in Denial of Service. ## Announcement Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/329 ## <a name="mitigation-factors"></a>Mitigation factors JSON models which do not utilize the `[ExtensionData]` feature are not impacted by this vulnerability. ## <a name="affected-software"></a>Affected software * Any .NET 8.0 application running on .NET 8.0.8 or earlier. * Any .NET 6.0 ...
# 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 | ...
# Microsoft Security Advisory CVE-2024-43483 | .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.Security.Cryptography.Cose, System.IO.Packaging, System.Runtime.Caching. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. System.Security.Cryptography.Cose, System.IO.Packaging, System.Runtime.Caching may be exposed to a hostile input which may lead them to be susceptible to hash flooding attacks resulting in denial of service. ## Announcement Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/327 ## <a name="mitigation-factors"></a>Mitigation factors Microsoft has not identified any mitigating factors for this vulnerability. ## <a name="affected-software"></a>Affected software * Any .NET 8.0 application running on .NET 8.0.8 or e...
# Microsoft Security Advisory CVE-2024-38229 | .NET Remote Code Execution Vulnerability ## <a name="executive-summary"></a>Executive summary Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 8.0 and .NET 9.0. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. A vulnerability exists in ASP.NET when closing an HTTP/3 stream while application code is writing to the response body, a race condition may lead to use-after-free. Note: HTTP/3 is experimental in .NET 6.0. If you are on .NET 6.0 and using HTTP/3, please upgrade to .NET 8.0.10. .NET 6.0 will not receive a security patch for this vulnerability. ## Announcement Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/326 ## <a name="mitigation-factors"></a>Mitigation factors HTTP/3 support is not enabled by default in ASP.NET Core applications. For more information on how ...