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<p>==============================<span class="sewb1rc8wc2ds08"></span><span
class="sewb1rc8wc2ds08"></span>============================================<br>
Ubuntu Security Notice USN-6278-1<br>
August 08, 2023<br>
<br>
dotnet6, dotnet7 vulnerabilities<br>
==========================================================================<br>
<br>
A security issue affects these releases of Ubuntu and its
derivatives:<br>
<br>
- Ubuntu 23.04<br>
<br>
Summary:<br>
<br>
Several security issues were fixed in .NET.<br>
<br>
Software Description:<br>
- dotnet6: dotNET CLI tools and runtime<br>
- dotnet7: dotNET CLI tools and runtime<br>
<br>
Details:<br>
<br>
It was discovered that .NET did not properly handle the execution
of<br>
certain commands. An attacker could possibly use this issue to<br>
achieve remote code execution. (CVE-2023-35390)<br>
<br>
Benoit Foucher discovered that .NET did not properly implement the<br>
QUIC stream limit in HTTP/3. An attacker could possibly use this<br>
issue to cause a denial of service. (CVE-2023-38178)<br>
<br>
It was discovered that .NET did not properly handle the
disconnection<br>
of potentially malicious clients interfacing with a Kestrel
server. An<br>
attacker could possibly use this issue to cause a denial of
service.<br>
(CVE-2023-38180)<br>
<br>
Update instructions:<br>
<br>
The problem can be corrected by updating your system to the
following<br>
package versions:<br>
<br>
Ubuntu 23.04:<br>
aspnetcore-runtime-6.0 6.0.121-0ubuntu1~23.04.1<br>
aspnetcore-runtime-7.0 7.0.110-0ubuntu1~23.04.1<br>
dotnet-host
6.0.121-0ubuntu1~23.04.1<br>
dotnet-host-7.0 7.0.110-0ubuntu1~23.04.1<br>
dotnet-hostfxr-6.0 6.0.121-0ubuntu1~23.04.1<br>
dotnet-hostfxr-7.0 7.0.110-0ubuntu1~23.04.1<br>
dotnet-runtime-6.0 6.0.121-0ubuntu1~23.04.1<br>
dotnet-runtime-7.0 7.0.110-0ubuntu1~23.04.1<br>
dotnet-sdk-6.0 6.0.121-0ubuntu1~23.04.1<br>
dotnet-sdk-7.0 7.0.110-0ubuntu1~23.04.1<br>
dotnet6
6.0.121-0ubuntu1~23.04.1<br>
dotnet7
7.0.110-0ubuntu1~23.04.1<br>
<br>
In general, a standard system update will make all the necessary
changes.<br>
<br>
References:<br>
<a class="moz-txt-link-freetext" href="https://ubuntu.com/security/notices/USN-6278-1">https://ubuntu.com/security/notices/USN-6278-1</a><br>
CVE-2023-35390, CVE-2023-38178, CVE-2023-38180<br>
<br>
Package Information:<br>
<a class="moz-txt-link-freetext" href="https://launchpad.net/ubuntu/+source/dotnet6/6.0.121-0ubuntu1~23.04.1">https://launchpad.net/ubuntu/+source/dotnet6/6.0.121-0ubuntu1~23.04.1</a><br>
<a class="moz-txt-link-freetext" href="https://launchpad.net/ubuntu/+source/dotnet7/7.0.110-0ubuntu1~23.04.1">https://launchpad.net/ubuntu/+source/dotnet7/7.0.110-0ubuntu1~23.04.1</a></p>
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