BIT-aspnet-core-2020-1045

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    BIT-aspnet-core-2020-1045

    Published: 6 Mar 2024Last Modified: 8 Sept 2026

    Summary: Microsoft ASP.NET Core Security Feature Bypass Vulnerability

    Details: <p>A security feature bypass vulnerability exists in the way Microsoft ASP.NET Core parses encoded cookie names.</p> <p>The ASP.NET Core cookie parser decodes entire cookie strings which could allow a malicious attacker to set a second cookie with the name being percent encoded.</p> <p>The security update addresses the vulnerability by fixing the way the ASP.NET Core cookie parser handles encoded names.</p>

    References: https://access.redhat.com/errata/RHSA-2020:3699, https://github.com/dotnet/core/blob/main/release-notes/3.1/3.1.8/3.1.8.md#changes-in-318, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5LN2FUVBSVPGK7AU3NMLO3YR6CGONQPB/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ASICXQXS4M7MTAF6SGQMCLCA63DLCUT3/, https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1045, https://security.snyk.io/vuln/SNYK-RHEL8-DOTNET-1439600, https://nvd.nist.gov/vuln/detail/CVE-2020-1045

    Affected packages

    Package

    Name: aspnet-core

    Purl: pkg:bitnami/aspnet-core

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 3.1.0
    Fixed -3.1.8

    Affected versions

    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
    BIT-aspnet-core-2020-1045 | CVE-DB