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    CVE-2021-34713

    A vulnerability in the Layer 2 punt code of Cisco IOS XR Software running on Cisco ASR 9000 Series Aggregation Services Routers could allow an unauthenticated, adjacent attacker to cause the affected line card to reboot. This vulnerability is due to incorrect handling of specific Ethernet frames that cause a spin loop that can make the network processors unresponsive. An attacker could exploit this vulnerability by sending specific types of Ethernet frames on the segment where the affected line cards are attached. A successful exploit could allow the attacker to cause the affected line card to reboot.

    Published:Sep 9, 2021
    Last Modified:Nov 21, 2024
    EPS:Sep 9, 2021
    EPSS Score:0.00101
    CVSS Score:7.4

    Affected Products

    Vendor
    Cisco
    Product
    Asr 9000
    Vendor
    Cisco
    Product
    Asr 9000v-v2
    Vendor
    Cisco
    Product
    Asr 9001
    Vendor
    Cisco
    Product
    Asr 9006
    Vendor
    Cisco
    Product
    Asr 9010
    Vendor
    Cisco
    Product
    Asr 9901
    Vendor
    Cisco
    Product
    Asr 9902
    Vendor
    Cisco
    Product
    Asr 9903
    Vendor
    Cisco
    Product
    Asr 9904
    Vendor
    Cisco
    Product
    Asr 9906
    Vendor
    Cisco
    Product
    Asr 9910
    Vendor
    Cisco
    Product
    Asr 9912
    Vendor
    Cisco
    Product
    Asr 9922
    Vendor
    Cisco
    Product
    Ios Xr

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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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