Headline
Ubuntu Security Notice USN-5798-1
Ubuntu Security Notice 5798-1 - Johan Gorter discovered that .NET 6 incorrectly processed certain invalid HTTP requests. An attacker could possibly use this issue to cause a denial of service condition for an exposed endpoint.
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Ubuntu Security Notice USN-5798-1
January 10, 2023
dotnet6 vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 22.10
- Ubuntu 22.04 LTS
Summary:
dotnet6 could be made to crash if it received specially crafted
network traffic.
Software Description:
- dotnet6: dotNET CLI tools and runtime
Details:
Johan Gorter discovered that .NET 6 incorrectly processed certain
invalid HTTP requests. An attacker could possibly use this issue to
cause a denial of service condition for an exposed endpoint.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 22.10:
aspnetcore-runtime-6.0 6.0.113-0ubuntu1~22.10.1
dotnet-host 6.0.113-0ubuntu1~22.10.1
dotnet-hostfxr-6.0 6.0.113-0ubuntu1~22.10.1
dotnet-runtime-6.0 6.0.113-0ubuntu1~22.10.1
dotnet-sdk-6.0 6.0.113-0ubuntu1~22.10.1
dotnet6 6.0.113-0ubuntu1~22.10.1
Ubuntu 22.04 LTS:
aspnetcore-runtime-6.0 6.0.113-0ubuntu1~22.04.1
dotnet-host 6.0.113-0ubuntu1~22.04.1
dotnet-hostfxr-6.0 6.0.113-0ubuntu1~22.04.1
dotnet-runtime-6.0 6.0.113-0ubuntu1~22.04.1
dotnet-sdk-6.0 6.0.113-0ubuntu1~22.04.1
dotnet6 6.0.113-0ubuntu1~22.04.1
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-5798-1
CVE-2023-21538
Package Information:
https://launchpad.net/ubuntu/+source/dotnet6/6.0.113-0ubuntu1~22.10.1
https://launchpad.net/ubuntu/+source/dotnet6/6.0.113-0ubuntu1~22.04.1
Related news
An update for .NET 6.0 is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2023-21538: dotnet: Parsing an empty HTTP response as a JSON.NET JObject causes a stack overflow and crashes a process
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# Microsoft Security Advisory CVE-2023-21538: .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 .NET 6.0. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. A denial of service vulnerability exists in .NET 6.0 where a malicious client could cause a stack overflow which may result in a denial of service attack when an attacker sends an invalid request to an exposed endpoint. ## Discussion Discussion for this issue can be found at https://github.com/dotnet/runtime/issues/80449 ### <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 6.0 application running on .NET 6.0.12 or earlier. If your application uses the following package versions, en...