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    CVE-2021-1229

    A vulnerability in ICMP Version 6 (ICMPv6) processing in Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a slow system memory leak, which over time could lead to a denial of service (DoS) condition. This vulnerability is due to improper error handling when an IPv6-configured interface receives a specific type of ICMPv6 packet. An attacker could exploit this vulnerability by sending a sustained rate of crafted ICMPv6 packets to a local IPv6 address on a targeted device. A successful exploit could allow the attacker to cause a system memory leak in the ICMPv6 process on the device. As a result, the ICMPv6 process could run out of system memory and stop processing traffic. The device could then drop all ICMPv6 packets, causing traffic instability on the device. Restoring device functionality would require a device reboot.

    Published:Feb 24, 2021
    Last Modified:Nov 21, 2024
    EPS:Feb 24, 2021
    EPSS Score:0.00981
    CVSS Score:5.8

    Affected Products

    Vendor
    Cisco
    Product
    Mds 9148s
    Vendor
    Cisco
    Product
    Mds 9250i
    Vendor
    Cisco
    Product
    Mds 9706
    Vendor
    Cisco
    Product
    Mds 9710
    Vendor
    Cisco
    Product
    Nexus 1000 Virtual Edge For Vmware Vsphere
    Vendor
    Cisco
    Product
    Nexus 1000v Switch For Microsoft Hyper-v
    Vendor
    Cisco
    Product
    Nexus 1000v Switch For Vmware Vsphere
    Vendor
    Cisco
    Product
    Nexus 3048
    Vendor
    Cisco
    Product
    Nexus 31108pv-v
    Vendor
    Cisco
    Product
    Nexus 31108tc-v
    Vendor
    Cisco
    Product
    Nexus 31128pq
    Vendor
    Cisco
    Product
    Nexus 3132c-z
    Vendor
    Cisco
    Product
    Nexus 3132q-v
    Vendor
    Cisco
    Product
    Nexus 3132q-x
    Vendor
    Cisco
    Product
    Nexus 3132q-xl
    Vendor
    Cisco
    Product
    Nexus 3164q
    Vendor
    Cisco
    Product
    Nexus 3172pq
    Vendor
    Cisco
    Product
    Nexus 3172pq-xl
    Vendor
    Cisco
    Product
    Nexus 3232c
    Vendor
    Cisco
    Product
    Nexus 3264c-e
    Vendor
    Cisco
    Product
    Nexus 3264q
    Vendor
    Cisco
    Product
    Nexus 3408-s
    Vendor
    Cisco
    Product
    Nexus 34180yc
    Vendor
    Cisco
    Product
    Nexus 3432d-s
    Vendor
    Cisco
    Product
    Nexus 3464c
    Vendor
    Cisco
    Product
    Nexus 3524-x
    Vendor
    Cisco
    Product
    Nexus 3524-xl
    Vendor
    Cisco
    Product
    Nexus 3548-x
    Vendor
    Cisco
    Product
    Nexus 3548-xl
    Vendor
    Cisco
    Product
    Nexus 36180yc-r
    Vendor
    Cisco
    Product
    Nexus 3636c-r
    Vendor
    Cisco
    Product
    Nexus 5548p
    Vendor
    Cisco
    Product
    Nexus 5548up
    Vendor
    Cisco
    Product
    Nexus 5596t
    Vendor
    Cisco
    Product
    Nexus 5596up
    Vendor
    Cisco
    Product
    Nexus 56128p
    Vendor
    Cisco
    Product
    Nexus 5624q
    Vendor
    Cisco
    Product
    Nexus 5648q
    Vendor
    Cisco
    Product
    Nexus 5672up
    Vendor
    Cisco
    Product
    Nexus 5672up-16g
    Vendor
    Cisco
    Product
    Nexus 5696q
    Vendor
    Cisco
    Product
    Nexus 6001
    Vendor
    Cisco
    Product
    Nexus 6004
    Vendor
    Cisco
    Product
    Nexus 7000
    Vendor
    Cisco
    Product
    Nexus 7700
    Vendor
    Cisco
    Product
    Nexus 9000v
    Vendor
    Cisco
    Product
    Nexus 92160yc-x
    Vendor
    Cisco
    Product
    Nexus 9221c
    Vendor
    Cisco
    Product
    Nexus 92300yc
    Vendor
    Cisco
    Product
    Nexus 92304qc
    Vendor
    Cisco
    Product
    Nexus 92348gc-x
    Vendor
    Cisco
    Product
    Nexus 9236c
    Vendor
    Cisco
    Product
    Nexus 9272q
    Vendor
    Cisco
    Product
    Nexus 93108tc-ex
    Vendor
    Cisco
    Product
    Nexus 93108tc-ex-24
    Vendor
    Cisco
    Product
    Nexus 93108tc-fx
    Vendor
    Cisco
    Product
    Nexus 93108tc-fx-24
    Vendor
    Cisco
    Product
    Nexus 93120tx
    Vendor
    Cisco
    Product
    Nexus 93128tx
    Vendor
    Cisco
    Product
    Nexus 9316d-gx
    Vendor
    Cisco
    Product
    Nexus 93180lc-ex
    Vendor
    Cisco
    Product
    Nexus 93180yc-ex
    Vendor
    Cisco
    Product
    Nexus 93180yc-ex-24
    Vendor
    Cisco
    Product
    Nexus 93180yc-fx
    Vendor
    Cisco
    Product
    Nexus 93180yc-fx-24
    Vendor
    Cisco
    Product
    Nexus 93180yc-fx3
    Vendor
    Cisco
    Product
    Nexus 93180yc-fx3s
    Vendor
    Cisco
    Product
    Nexus 93216tc-fx2
    Vendor
    Cisco
    Product
    Nexus 93240yc-fx2
    Vendor
    Cisco
    Product
    Nexus 9332pq
    Vendor
    Cisco
    Product
    Nexus 93360yc-fx2
    Vendor
    Cisco
    Product
    Nexus 9336c-fx2
    Vendor
    Cisco
    Product
    Nexus 9336c-fx2-e
    Vendor
    Cisco
    Product
    Nexus 9336pq
    Vendor
    Cisco
    Product
    Nexus 9348gc-fxp
    Vendor
    Cisco
    Product
    Nexus 93600cd-gx
    Vendor
    Cisco
    Product
    Nexus 9364c
    Vendor
    Cisco
    Product
    Nexus 9364c-gx
    Vendor
    Cisco
    Product
    Nexus 9372px
    Vendor
    Cisco
    Product
    Nexus 9372px-e
    Vendor
    Cisco
    Product
    Nexus 9372tx
    Vendor
    Cisco
    Product
    Nexus 9372tx-e
    Vendor
    Cisco
    Product
    Nexus 9396px
    Vendor
    Cisco
    Product
    Nexus 9396tx
    Vendor
    Cisco
    Product
    Nexus 9508
    Vendor
    Cisco
    Product
    Nx-os

    Exploits

    No exploit reference

    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