GHSA-9q94-v7ch-mxqw

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    GHSA-9q94-v7ch-mxqw

    Published: 2 Aug 2021Last Modified: 17 Feb 2024
    Aliases:
    CVE-2020-8867

    Summary: Insufficient Session Expiration and TOCTOU Race Condition in OPC FOundation UA .Net Standard

    Details: This vulnerability allows remote attackers to create a denial-of-service condition on affected installations of OPC Foundation UA .NET Standard 1.04.358.30. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of sessions. The issue results from the lack of proper locking when performing operations on an object. An attacker can leverage this vulnerability to create a denial-of-service condition against the application. Was ZDI-CAN-10295.

    References: https://nvd.nist.gov/vuln/detail/CVE-2020-8867, https://github.com/OPCFoundation/UA-.NETStandard/releases/tag/1.4.359.31, https://opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2020-8867.pdf, https://www.zerodayinitiative.com/advisories/ZDI-20-536

    Affected packages

    Package

    Name: OPCFoundation.NetStandard.Opc.Ua

    Purl: pkg:nuget/OPCFoundation.NetStandard.Opc.Ua

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1.4.359.31

    Affected versions

    0.4.0
    0.4.1
    0.4.3
    0.4.4
    0.4.5

    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
    GHSA-9q94-v7ch-mxqw | CVE-DB