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    CVE-2021-39156

    Istio is an open source platform for providing a uniform way to integrate microservices, manage traffic flow across microservices, enforce policies and aggregate telemetry data. Istio 1.11.0, 1.10.3 and below, and 1.9.7 and below contain a remotely exploitable vulnerability where an HTTP request with `#fragment` in the path may bypass Istio’s URI path based authorization policies. Patches are available in Istio 1.11.1, Istio 1.10.4 and Istio 1.9.8. As a work around a Lua filter may be written to normalize the path.

    Published:Aug 24, 2021
    Last Modified:Nov 21, 2024
    EPS:Aug 24, 2021
    EPSS Score:0.00291
    CVSS Score:8.1

    Affected Products

    Vendor
    Istio
    Product
    Istio
    Vendor
    Redhat
    Product
    Service Mesh

    Exploits

    https://github.com/mostafaanouarghorab/MicroserviceCVE-2021-39156

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    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