USN-6438-2

    Dashboard / Vulnerabilities / USN-6438-2

    USN-6438-2

    Published: 25 Oct 2023Last Modified: 4 Feb 2026

    Summary: .Net regressions

    Details: USN-6438-1 fixed vulnerabilities in .Net. It was discovered that the fix for [CVE-2023-36799](https://ubuntu.com/security/CVE-2023-36799) was incomplete. This update fixes the problem. Original advisory details: Kevin Jones discovered that .NET did not properly process certain X.509 certificates. An attacker could possibly use this issue to cause a denial of service. (CVE-2023-36799) It was discovered that the .NET Kestrel web server did not properly handle HTTP/2 requests. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2023-44487)

    References: https://ubuntu.com/security/notices/USN-6438-2, https://ubuntu.com/security/CVE-2023-36799, https://launchpad.net/bugs/2040207, https://launchpad.net/bugs/2040208

    Affected packages

    Package

    Name: dotnet6

    Purl: pkg:deb/ubuntu/[email protected]~23.10.1?arch=source&distro=mantic

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -6.0.124-0ubuntu1~23.10.1

    Affected versions

    6.0.116-0ubuntu2
    6.0.116-0ubuntu3
    6.0.118-0ubuntu1
    6.0.119-0ubuntu1
    6.0.120-0ubuntu1
    6.0.120-0ubuntu2
    6.0.121-0ubuntu1
    6.0.123-0ubuntu1

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    USN-6438-2 | CVE-DB