Ubuntu update for dotnet6

1) Insecure DLL loading

EUVDB-ID: #VU74917

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-2023-28260

CWE-ID: CWE-427 - Uncontrolled Search Path Element

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to the application loads DLL libraries in an insecure manner. A remote attacker can place a specially crafted .dll file on a remote SMB fileshare, trick the victim into opening a file, associated with the vulnerable application, and execute arbitrary code on victim's system.

Mitigation

Update the affected package dotnet6 to the latest version.

Vulnerable software versions

Ubuntu: 22.04 - 22.10

dotnet-host-7.0 (Ubuntu package): before 7.0.105-0ubuntu1~22.10.1

dotnet-runtime-6.0 (Ubuntu package): before 6.0.116-0ubuntu1~22.04.1

dotnet-runtime-7.0 (Ubuntu package): before 7.0.105-0ubuntu1~22.10.1

aspnetcore-runtime-7.0 (Ubuntu package): before 7.0.105-0ubuntu1~22.10.1

dotnet6 (Ubuntu package): before 6.0.116-0ubuntu1~22.04.1

dotnet7 (Ubuntu package): before 7.0.105-0ubuntu1~22.10.1

dotnet-sdk-7.0 (Ubuntu package): before 7.0.105-0ubuntu1~22.10.1

dotnet-sdk-6.0 (Ubuntu package): before 6.0.116-0ubuntu1~22.04.1

dotnet-host (Ubuntu package): before 6.0.116-0ubuntu1~22.04.1

dotnet-hostfxr-6.0 (Ubuntu package): before 6.0.116-0ubuntu1~22.04.1

dotnet-hostfxr-7.0 (Ubuntu package): before 7.0.105-0ubuntu1~22.10.1

aspnetcore-runtime-6.0 (Ubuntu package): before 6.0.116-0ubuntu1~22.04.1

CPE2.3

• cpe:2.3:o:canonical:ubuntu:22.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:22.10:*:*:*:*:*:*:*
• cpe:2.3:a:canonical:dotnet-host-7.0_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:dotnet-runtime-6.0_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:dotnet-runtime-7.0_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:aspnetcore-runtime-7.0_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:dotnet6_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:dotnet7_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:dotnet-sdk-7.0_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:dotnet-sdk-6.0_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:dotnet-host_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:dotnet-hostfxr-6.0_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:dotnet-hostfxr-7.0_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:a:canonical:aspnetcore-runtime-6.0_ubuntu_package:*:*:*:*:*:ubuntu:*:*

External links

https://ubuntu.com/security/notices/USN-6006-1

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.