Ubuntu update for dotnet6

1) Input validation error

EUVDB-ID: #VU80730

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

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: 23.10

dotnet7 (Ubuntu package): before 7.0.112-0ubuntu1~22.04.1

dotnet6 (Ubuntu package): before 6.0.123-0ubuntu1~22.04.1

dotnet-sdk-7.0 (Ubuntu package): before 7.0.112-0ubuntu1~22.04.1

dotnet-sdk-6.0 (Ubuntu package): before 6.0.123-0ubuntu1~22.04.1

dotnet-runtime-7.0 (Ubuntu package): before 7.0.112-0ubuntu1~22.04.1

dotnet-runtime-6.0 (Ubuntu package): before 6.0.123-0ubuntu1~22.04.1

dotnet-hostfxr-7.0 (Ubuntu package): before 7.0.112-0ubuntu1~22.04.1

dotnet-hostfxr-6.0 (Ubuntu package): before 6.0.123-0ubuntu1~22.04.1

dotnet-host-7.0 (Ubuntu package): before 7.0.112-0ubuntu1~22.04.1

dotnet-host (Ubuntu package): before 6.0.123-0ubuntu1~22.04.1

aspnetcore-runtime-7.0 (Ubuntu package): before 7.0.112-0ubuntu1~22.04.1

aspnetcore-runtime-6.0 (Ubuntu package): before 6.0.123-0ubuntu1~22.04.1

CPE2.3

• cpe:2.3:o:canonical:ubuntu:23.10:*:*:*:*:*:*:

External links

http://ubuntu.com/security/notices/USN-6438-1

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) Resource exhaustion

EUVDB-ID: #VU81728

Risk: High

CVSSv3.1: 5.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:H/RL:O/RC:C]

CVE-ID: CVE-2023-44487

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: Yes

Description

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

The vulnerability exists due to improperly control of consumption for internal resources when handling HTTP/2 requests with compressed HEADERS frames. A remote attacker can send a sequence of compressed HEADERS frames followed by RST_STREAM frames and perform a denial of service (DoS) attack, a.k.a. "Rapid Reset".

Note, the vulnerability is being actively exploited in the wild.

Mitigation

Update the affected package dotnet6 to the latest version.

Vulnerable software versions

Ubuntu: 23.10

dotnet7 (Ubuntu package): before 7.0.112-0ubuntu1~22.04.1

dotnet6 (Ubuntu package): before 6.0.123-0ubuntu1~22.04.1

dotnet-sdk-7.0 (Ubuntu package): before 7.0.112-0ubuntu1~22.04.1

dotnet-sdk-6.0 (Ubuntu package): before 6.0.123-0ubuntu1~22.04.1

dotnet-runtime-7.0 (Ubuntu package): before 7.0.112-0ubuntu1~22.04.1

dotnet-runtime-6.0 (Ubuntu package): before 6.0.123-0ubuntu1~22.04.1

dotnet-hostfxr-7.0 (Ubuntu package): before 7.0.112-0ubuntu1~22.04.1

dotnet-hostfxr-6.0 (Ubuntu package): before 6.0.123-0ubuntu1~22.04.1

dotnet-host-7.0 (Ubuntu package): before 7.0.112-0ubuntu1~22.04.1

dotnet-host (Ubuntu package): before 6.0.123-0ubuntu1~22.04.1

aspnetcore-runtime-7.0 (Ubuntu package): before 7.0.112-0ubuntu1~22.04.1

aspnetcore-runtime-6.0 (Ubuntu package): before 6.0.123-0ubuntu1~22.04.1

CPE2.3

• cpe:2.3:o:canonical:ubuntu:23.10:*:*:*:*:*:*:

External links

http://ubuntu.com/security/notices/USN-6438-1

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?

Yes. This vulnerability is being exploited in the wild.