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    CVE-2021-33541

    Phoenix Contact Classic Line Controllers ILC1x0 and ILC1x1 in all versions/variants are affected by a Denial-of-Service vulnerability. The communication protocols and device access do not feature authentication measures. Remote attackers can use specially crafted IP packets to cause a denial of service on the PLC's network communication module. A successful attack stops all network communication. To restore the network connectivity the device needs to be restarted. The automation task is not affected.

    Published:Jun 25, 2021
    Last Modified:Nov 21, 2024
    EPS:Jun 25, 2021
    EPSS Score:0.01309
    CVSS Score:7.5

    Affected Products

    Vendor
    Phoenixcontact
    Product
    Ilc1x0
    Vendor
    Phoenixcontact
    Product
    Ilc1x0 Firmware
    Vendor
    Phoenixcontact
    Product
    Ilc1x1
    Vendor
    Phoenixcontact
    Product
    Ilc1x1 Firmware

    Exploits

    No exploit reference

    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