Ubuntu update for dotnet8

Published: 2025-01-16

Risk	High
Patch available	YES
Number of vulnerabilities	4
CVE-ID	CVE-2025-21171 CVE-2025-21172 CVE-2025-21173 CVE-2025-21176
CWE-ID	CWE-122 CWE-190 CWE-379 CWE-125
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	Ubuntu Operating systems & Components / Operating system dotnet9 (Ubuntu package) Operating systems & Components / Operating system package or component dotnet8 (Ubuntu package) Operating systems & Components / Operating system package or component dotnet-sdk-9.0 (Ubuntu package) Operating systems & Components / Operating system package or component dotnet-sdk-8.0 (Ubuntu package) Operating systems & Components / Operating system package or component dotnet-runtime-9.0 (Ubuntu package) Operating systems & Components / Operating system package or component dotnet-runtime-8.0 (Ubuntu package) Operating systems & Components / Operating system package or component dotnet-hostfxr-9.0 (Ubuntu package) Operating systems & Components / Operating system package or component dotnet-hostfxr-8.0 (Ubuntu package) Operating systems & Components / Operating system package or component dotnet-host-9.0 (Ubuntu package) Operating systems & Components / Operating system package or component dotnet-host-8.0 (Ubuntu package) Operating systems & Components / Operating system package or component aspnetcore-runtime-9.0 (Ubuntu package) Operating systems & Components / Operating system package or component aspnetcore-runtime-8.0 (Ubuntu package) Operating systems & Components / Operating system package or component
Vendor	Canonical Ltd.

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

1) Heap-based buffer overflow

EUVDB-ID: #VU102801

Risk: Medium

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-21171

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error in .NET. A remote attacker can pass specially crafted data to the application, trigger a heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected package dotnet8 to the latest version.

Vulnerable software versions

Ubuntu: 22.04 - 24.10

dotnet9 (Ubuntu package): before 9.0.102-9.0.1-0ubuntu1~24.10.1

dotnet8 (Ubuntu package): before 8.0.112-8.0.12-0ubuntu1~22.04.1

dotnet-sdk-9.0 (Ubuntu package): before 9.0.102-0ubuntu1~24.10.1

dotnet-sdk-8.0 (Ubuntu package): before 8.0.112-0ubuntu1~22.04.1

dotnet-runtime-9.0 (Ubuntu package): before 9.0.1-0ubuntu1~24.10.1

dotnet-runtime-8.0 (Ubuntu package): before 8.0.12-0ubuntu1~22.04.1

dotnet-hostfxr-9.0 (Ubuntu package): before 9.0.1-0ubuntu1~24.10.1

dotnet-hostfxr-8.0 (Ubuntu package): before 8.0.12-0ubuntu1~22.04.1

dotnet-host-9.0 (Ubuntu package): before 9.0.1-0ubuntu1~24.10.1

dotnet-host-8.0 (Ubuntu package): before 8.0.12-0ubuntu1~22.04.1

aspnetcore-runtime-9.0 (Ubuntu package): before 9.0.1-0ubuntu1~24.10.1

aspnetcore-runtime-8.0 (Ubuntu package): before 8.0.12-0ubuntu1~22.04.1

CPE2.3

External links

https://ubuntu.com/security/notices/USN-7210-1

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) Integer overflow

EUVDB-ID: #VU102804

Risk: Medium

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2025-21172

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

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

The vulnerability exists due to integer overflow in .NET and Visual Studio. A remote attacker can trick a victim to open a specially crafted file, trigger integer overflow and execute arbitrary code on the target system.