Ubuntu update for dotnet6

1) Race condition

EUVDB-ID: #VU78213

Risk: High

CVSSv4.0: 7.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2023-33170

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to a race condition in the ASP.NET and Visual Studio. A remote attacker can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the system.

Mitigation

Update the affected package dotnet6 to the latest version.

Vulnerable software versions

Ubuntu: 22.04 - 23.04

dotnet-host-7.0 (Ubuntu package): before 7.0.109-0ubuntu1~22.04.1

dotnet-runtime-6.0 (Ubuntu package): before 6.0.120-0ubuntu1~22.04.1

dotnet-runtime-7.0 (Ubuntu package): before 7.0.109-0ubuntu1~22.04.1

dotnet7 (Ubuntu package): before 7.0.109-0ubuntu1~22.04.1

dotnet6 (Ubuntu package): before 6.0.120-0ubuntu1~22.04.1

dotnet-sdk-7.0 (Ubuntu package): before 7.0.109-0ubuntu1~22.04.1

dotnet-sdk-6.0 (Ubuntu package): before 6.0.120-0ubuntu1~22.04.1

aspnetcore-runtime-7.0 (Ubuntu package): before 7.0.109-0ubuntu1~22.04.1

dotnet-host (Ubuntu package): before 6.0.120-0ubuntu1~22.04.1

dotnet-hostfxr-6.0 (Ubuntu package): before 6.0.120-0ubuntu1~22.04.1

dotnet-hostfxr-7.0 (Ubuntu package): before 7.0.109-0ubuntu1~22.04.1

aspnetcore-runtime-6.0 (Ubuntu package): before 6.0.120-0ubuntu1~22.04.1

CPE2.3

• cpe:2.3:o:canonical:ubuntu:22.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:22.10:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:ubuntu:23.04:*:*:*:*:*:*:*
• cpe:2.3:o:canonical:dotnet-host-7.0_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:dotnet-runtime-6.0_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:dotnet-runtime-7.0_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• 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:aspnetcore-runtime-7.0_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:dotnet-host_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:dotnet-hostfxr-6.0_ubuntu_package:*:*:*:*:*:ubuntu:*:*
• cpe:2.3:o:canonical:dotnet-hostfxr-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-6217-1

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.