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Ubuntu 22.04 LTS USN-6278-2 Critical: DotNET RCE And DoS Threats

ubuntu
Calendar Grey August 10, 2023
Dist Ubuntu Esm H88
Numerous .NET security flaws mitigated in Ubuntu 22.04 LTS, featuring threats of remote code execution and denial of service incidents.
Several security issues were fixed in .NET.

Summary

Several security issues were fixed in .NET.

Software Description:

- dotnet6: dotNET CLI tools and runtime

- dotnet7: dotNET CLI tools and runtime

Details:

USN-6278-1 fixed several vulnerabilities in .NET. This update

provides the corresponding updates for Ubuntu 22.04 LTS.

Original advisory details:

  It was discovered that .NET did properly handle the execution of

  certain commands. An attacker could possibly use this issue to

  achieve remote code execution. (CVE-2023-35390)

  Benoit Foucher discovered that .NET did not properly implement the

  QUIC stream limit in HTTP/3. An attacker could possibly use this

  issue to cause a denial of service. (CVE-2023-38178)

  It was discovered that .NET did not properly handle the disconnection

  of potentially malicious clients interfacing with a Kestrel server. An

  attacker could possibly use this issue to cause a denial of service.

  (CVE-2023-38180)

Topics%20covered

Topics Covered

security advisory software update remote code execution DoS Ubuntu dotnet

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 22.04 LTS:
    aspnetcore-runtime-6.0           6.0.121-0ubuntu1~22.04.1
    aspnetcore-runtime-7.0           7.0.110-0ubuntu1~22.04.1
    dotnet-host 6.0.121-0ubuntu1~22.04.1
    dotnet-host-7.0                       7.0.110-0ubuntu1~22.04.1
    dotnet-hostfxr-6.0                   6.0.121-0ubuntu1~22.04.1
    dotnet-hostfxr-7.0                   7.0.110-0ubuntu1~22.04.1
    dotnet-runtime-6.0                  6.0.121-0ubuntu1~22.04.1
    dotnet-runtime-7.0                  7.0.110-0ubuntu1~22.04.1
    dotnet-sdk-6.0                        6.0.121-0ubuntu1~22.04.1
    dotnet-sdk-7.0                        7.0.110-0ubuntu1~22.04.1
    dotnet6 6.0.121-0ubuntu1~22.04.1
    dotnet7 7.0.110-0ubuntu1~22.04.1

In general, a standard system update will make all the necessary changes.

References

   https://ubuntu.com/security/notices/USN-6278-2

   https://ubuntu.com/security/notices/USN-6278-1

   CVE-2023-35390, CVE-2023-38178, CVE-2023-38180

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6278-2

Topics%20covered

Topics Covered

security advisory software update remote code execution DoS Ubuntu dotnet

Package Information

https://launchpad.net/ubuntu/+source/dotnet6/6.0.121-0ubuntu1~22.04.1
https://launchpad.net/ubuntu/+source/dotnet7/7.0.110-0ubuntu1~22.04.1

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