Ubuntu update for dotnet6

Published: 2023-08-09

Risk	High
Patch available	YES
Number of vulnerabilities	3
CVE-ID	CVE-2023-35390 CVE-2023-38178 CVE-2023-38180
CWE-ID	CWE-20
Exploitation vector	Network
Public exploit	Vulnerability #3 is being exploited in the wild.
Vulnerable software	Ubuntu Operating systems & Components / Operating system dotnet7 (Ubuntu package) Operating systems & Components / Operating system package or component dotnet6 (Ubuntu package) Operating systems & Components / Operating system package or component dotnet-sdk-7.0 (Ubuntu package) Operating systems & Components / Operating system package or component dotnet-sdk-6.0 (Ubuntu package) Operating systems & Components / Operating system package or component dotnet-runtime-7.0 (Ubuntu package) Operating systems & Components / Operating system package or component dotnet-runtime-6.0 (Ubuntu package) Operating systems & Components / Operating system package or component dotnet-hostfxr-7.0 (Ubuntu package) Operating systems & Components / Operating system package or component dotnet-hostfxr-6.0 (Ubuntu package) Operating systems & Components / Operating system package or component dotnet-host-7.0 (Ubuntu package) Operating systems & Components / Operating system package or component dotnet-host (Ubuntu package) Operating systems & Components / Operating system package or component aspnetcore-runtime-7.0 (Ubuntu package) Operating systems & Components / Operating system package or component aspnetcore-runtime-6.0 (Ubuntu package) Operating systems & Components / Operating system package or component
Vendor	Canonical Ltd.

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU79182

Risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2023-35390

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to insufficient validation of user-supplied input in .NET and Visual Studio. A remote attacker can trick a victim to open a specially crafted file and execute arbitrary code on the system.

Mitigation

Update the affected package dotnet6 to the latest version.

Vulnerable software versions

Ubuntu: 23.04

dotnet7 (Ubuntu package): before 7.0.110-0ubuntu1~23.04.1

dotnet6 (Ubuntu package): before 6.0.121-0ubuntu1~23.04.1

dotnet-sdk-7.0 (Ubuntu package): before 7.0.110-0ubuntu1~23.04.1

dotnet-sdk-6.0 (Ubuntu package): before 6.0.121-0ubuntu1~23.04.1

dotnet-runtime-7.0 (Ubuntu package): before 7.0.110-0ubuntu1~23.04.1

dotnet-runtime-6.0 (Ubuntu package): before 6.0.121-0ubuntu1~23.04.1

dotnet-hostfxr-7.0 (Ubuntu package): before 7.0.110-0ubuntu1~23.04.1

dotnet-hostfxr-6.0 (Ubuntu package): before 6.0.121-0ubuntu1~23.04.1

dotnet-host-7.0 (Ubuntu package): before 7.0.110-0ubuntu1~23.04.1

dotnet-host (Ubuntu package): before 6.0.121-0ubuntu1~23.04.1

aspnetcore-runtime-7.0 (Ubuntu package): before 7.0.110-0ubuntu1~23.04.1

aspnetcore-runtime-6.0 (Ubuntu package): before 6.0.121-0ubuntu1~23.04.1

CPE2.3

External links

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

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.

2) Input validation error

EUVDB-ID: #VU79240

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-38178

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 pass specially crafted input to the application and perform a denial of service (DoS) attack.