Ubuntu update for dotnet6

1) Input validation error

EUVDB-ID: #VU80730

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-36799

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in .NET Core and Visual Studio. A remote attacker can trick a victim to open a specially crafted file and perform a denial of service (DoS) attack.

Mitigation

Update the affected package dotnet6 to the latest version.

Vulnerable software versions

Ubuntu: 22.04 - 23.04

dotnet7 (Ubuntu package): before 7.0.113-0ubuntu1~22.04.1

dotnet6 (Ubuntu package): before 6.0.124-0ubuntu1~22.04.1

dotnet-sdk-7.0 (Ubuntu package): before 7.0.113-0ubuntu1~22.04.1

dotnet-sdk-6.0 (Ubuntu package): before 6.0.124-0ubuntu1~22.04.1

dotnet-runtime-7.0 (Ubuntu package): before 7.0.113-0ubuntu1~22.04.1

dotnet-runtime-6.0 (Ubuntu package): before 6.0.124-0ubuntu1~22.04.1

dotnet-hostfxr-7.0 (Ubuntu package): before 7.0.113-0ubuntu1~22.04.1

dotnet-hostfxr-6.0 (Ubuntu package): before 6.0.124-0ubuntu1~22.04.1

dotnet-host-7.0 (Ubuntu package): before 7.0.113-0ubuntu1~22.04.1

dotnet-host (Ubuntu package): before 6.0.124-0ubuntu1~22.04.1

aspnetcore-runtime-7.0 (Ubuntu package): before 7.0.113-0ubuntu1~22.04.1

aspnetcore-runtime-6.0 (Ubuntu package): before 6.0.124-0ubuntu1~22.04.1

CPE2.3

• cpe:2.3:o:canonical:ubuntu:22.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:23.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:dotnet7_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:dotnet6_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:dotnet-sdk-7.0_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:dotnet-sdk-6.0_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:dotnet-runtime-7.0_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:dotnet-runtime-6.0_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:dotnet-hostfxr-7.0_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:dotnet-hostfxr-6.0_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:dotnet-host-7.0_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:dotnet-host_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:aspnetcore-runtime-7.0_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:aspnetcore-runtime-6.0_ubuntu_package:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-6362-2

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.