8.6
CWE
401
Advisory Published
Updated

CVE-2021-1387: Cisco NX-OS Software IPv6 Netstack Denial of Service Vulnerability

First published: Wed Feb 24 2021(Updated: )

A vulnerability in the network stack of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability exists because the software improperly releases resources when it processes certain IPv6 packets that are destined to an affected device. An attacker could exploit this vulnerability by sending multiple crafted IPv6 packets to an affected device. A successful exploit could cause the network stack to run out of available buffers, impairing operations of control plane and management plane protocols and resulting in a DoS condition. Manual intervention would be required to restore normal operations on the affected device. For more information about the impact of this vulnerability, see the Details section of this advisory.

Credit: ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco Unified Computing System>=4.0<4.0\(4k\)
Cisco Unified Computing System>=4.1<4.1\(1e\)
Cisco Ucs 64108
Cisco Ucs 6454
Cisco Nx-os=7.0\(0\)n1\(1\)
Cisco Nx-os=7.0\(1\)n1\(1\)
Cisco Nx-os=7.0\(2\)n1\(1\)
Cisco Nx-os=7.0\(3\)n1\(1\)
Cisco Nx-os=7.0\(4\)n1\(1\)
Cisco Nx-os=7.0\(4\)n1\(1a\)
Cisco Nx-os=7.0\(5\)n1\(1\)
Cisco Nx-os=7.0\(5\)n1\(1a\)
Cisco Nx-os=7.0\(6\)n1\(1\)
Cisco Nx-os=7.0\(6\)n1\(2s\)
Cisco Nx-os=7.0\(6\)n1\(3s\)
Cisco Nx-os=7.0\(6\)n1\(4s\)
Cisco Nx-os=7.0\(7\)n1\(1\)
Cisco Nx-os=7.0\(7\)n1\(1a\)
Cisco Nx-os=7.0\(7\)n1\(1b\)
Cisco Nx-os=7.0\(8\)n1\(1\)
Cisco Nx-os=7.0\(8\)n1\(1a\)
Cisco Nx-os=7.1\(0\)n1\(1\)
Cisco Nx-os=7.1\(0\)n1\(1a\)
Cisco Nx-os=7.1\(0\)n1\(1b\)
Cisco Nx-os=7.1\(1\)n1\(1\)
Cisco Nx-os=7.1\(1\)n1\(1a\)
Cisco Nx-os=7.1\(2\)n1\(1\)
Cisco Nx-os=7.1\(2\)n1\(1a\)
Cisco Nx-os=7.1\(3\)n1\(1\)
Cisco Nx-os=7.1\(3\)n1\(2\)
Cisco Nx-os=7.1\(3\)n1\(2a\)
Cisco Nx-os=7.1\(3\)n1\(3\)
Cisco Nx-os=7.1\(3\)n1\(4\)
Cisco Nx-os=7.1\(3\)n1\(5\)
Cisco Nx-os=7.1\(4\)n1\(1\)
Cisco Nx-os=7.1\(4\)n1\(1a\)
Cisco Nx-os=7.1\(4\)n1\(1c\)
Cisco Nx-os=7.1\(4\)n1\(1d\)
Cisco Nx-os=7.1\(5\)n1\(1\)
Cisco Nx-os=7.1\(5\)n1\(1b\)
Cisco Nx-os=7.2\(0\)n1\(1\)
Cisco Nx-os=7.2\(1\)n1\(1\)
Cisco Nx-os=7.3\(0\)n1\(1\)
Cisco Nx-os=7.3\(0\)n1\(1a\)
Cisco Nx-os=7.3\(0\)n1\(1b\)
Cisco Nx-os=7.3\(1\)n1\(1\)
Cisco Nx-os=7.3\(2\)n1\(1\)
Cisco Nx-os=7.3\(2\)n1\(1b\)
Cisco Nx-os=7.3\(2\)n1\(1c\)
Cisco Nx-os=7.3\(3\)n1\(1\)
Cisco Nx-os=7.3\(4\)n1\(1\)
Cisco Nx-os=7.3\(4\)n1\(1a\)
Cisco Nx-os=7.3\(5\)n1\(1\)
Cisco Nx-os=7.3\(6\)n1\(1\)
Cisco Nx-os=7.3\(6\)n1\(1a\)
Cisco Nx-os=7.3\(7\)n1\(1\)
Cisco Nx-os=7.3\(7\)n1\(1a\)
Cisco Nx-os=7.3\(7\)n1\(1b\)
Cisco Nexus 5548p
Cisco Nexus 5548up
Cisco Nexus 5596t
Cisco Nexus 5596up
Cisco Nexus 56128p
Cisco Nexus 5624q
Cisco Nexus 5648q
Cisco Nexus 5672up
Cisco Nexus 5672up-16g
Cisco Nexus 5696q
Cisco Nx-os=6.0\(2\)a3\(1\)
Cisco Nx-os=6.0\(2\)a3\(2\)
Cisco Nx-os=6.0\(2\)a3\(4\)
Cisco Nx-os=6.0\(2\)a4\(1\)
Cisco Nx-os=6.0\(2\)a4\(2\)
Cisco Nx-os=6.0\(2\)a4\(3\)
Cisco Nx-os=6.0\(2\)a4\(4\)
Cisco Nx-os=6.0\(2\)a4\(5\)
Cisco Nx-os=6.0\(2\)a4\(6\)
Cisco Nx-os=6.0\(2\)a6\(1\)
Cisco Nx-os=6.0\(2\)a6\(1a\)
Cisco Nx-os=6.0\(2\)a6\(2\)
Cisco Nx-os=6.0\(2\)a6\(2a\)
Cisco Nx-os=6.0\(2\)a6\(3\)
Cisco Nx-os=6.0\(2\)a6\(3a\)
Cisco Nx-os=6.0\(2\)a6\(4\)
Cisco Nx-os=6.0\(2\)a6\(4a\)
Cisco Nx-os=6.0\(2\)a6\(5\)
Cisco Nx-os=6.0\(2\)a6\(5a\)
Cisco Nx-os=6.0\(2\)a6\(5b\)
Cisco Nx-os=6.0\(2\)a6\(6\)
Cisco Nx-os=6.0\(2\)a6\(7\)
Cisco Nx-os=6.0\(2\)a6\(8\)
Cisco Nx-os=6.0\(2\)a7\(1\)
Cisco Nx-os=6.0\(2\)a7\(1a\)
Cisco Nx-os=6.0\(2\)a7\(2\)
Cisco Nx-os=6.0\(2\)a7\(2a\)
Cisco Nx-os=6.0\(2\)a8\(1\)
Cisco Nx-os=6.0\(2\)a8\(2\)
Cisco Nx-os=6.0\(2\)a8\(3\)
Cisco Nx-os=6.0\(2\)a8\(4\)
Cisco Nx-os=6.0\(2\)a8\(4a\)
Cisco Nx-os=6.0\(2\)a8\(5\)
Cisco Nx-os=6.0\(2\)a8\(6\)
Cisco Nx-os=6.0\(2\)a8\(7\)
Cisco Nx-os=6.0\(2\)a8\(7a\)
Cisco Nx-os=6.0\(2\)a8\(7b\)
Cisco Nx-os=6.0\(2\)a8\(8\)
Cisco Nx-os=6.0\(2\)a8\(9\)
Cisco Nx-os=6.0\(2\)a8\(10\)
Cisco Nx-os=6.0\(2\)a8\(10a\)
Cisco Nx-os=6.0\(2\)a8\(11\)
Cisco Nx-os=6.0\(2\)a8\(11a\)
Cisco Nx-os=6.0\(2\)a8\(11b\)
Cisco Nx-os=6.0\(2\)u2\(1\)
Cisco Nx-os=6.0\(2\)u2\(2\)
Cisco Nx-os=6.0\(2\)u2\(3\)
Cisco Nx-os=6.0\(2\)u2\(4\)
Cisco Nx-os=6.0\(2\)u2\(5\)
Cisco Nx-os=6.0\(2\)u2\(6\)
Cisco Nx-os=6.0\(2\)u3\(1\)
Cisco Nx-os=6.0\(2\)u3\(2\)
Cisco Nx-os=6.0\(2\)u3\(3\)
Cisco Nx-os=6.0\(2\)u3\(4\)
Cisco Nx-os=6.0\(2\)u3\(5\)
Cisco Nx-os=6.0\(2\)u3\(6\)
Cisco Nx-os=6.0\(2\)u3\(7\)
Cisco Nx-os=6.0\(2\)u3\(8\)
Cisco Nx-os=6.0\(2\)u3\(9\)
Cisco Nx-os=6.0\(2\)u4\(1\)
Cisco Nx-os=6.0\(2\)u4\(2\)
Cisco Nx-os=6.0\(2\)u4\(3\)
Cisco Nx-os=6.0\(2\)u4\(4\)
Cisco Nx-os=6.0\(2\)u5\(1\)
Cisco Nx-os=6.0\(2\)u5\(2\)
Cisco Nx-os=6.0\(2\)u5\(3\)
Cisco Nx-os=6.0\(2\)u5\(4\)
Cisco Nx-os=6.0\(2\)u6\(1\)
Cisco Nx-os=6.0\(2\)u6\(1a\)
Cisco Nx-os=6.0\(2\)u6\(2\)
Cisco Nx-os=6.0\(2\)u6\(2a\)
Cisco Nx-os=6.0\(2\)u6\(3\)
Cisco Nx-os=6.0\(2\)u6\(3a\)
Cisco Nx-os=6.0\(2\)u6\(4\)
Cisco Nx-os=6.0\(2\)u6\(4a\)
Cisco Nx-os=6.0\(2\)u6\(5\)
Cisco Nx-os=6.0\(2\)u6\(5a\)
Cisco Nx-os=6.0\(2\)u6\(5b\)
Cisco Nx-os=6.0\(2\)u6\(5c\)
Cisco Nx-os=6.0\(2\)u6\(6\)
Cisco Nx-os=6.0\(2\)u6\(7\)
Cisco Nx-os=6.0\(2\)u6\(8\)
Cisco Nx-os=6.0\(2\)u6\(9\)
Cisco Nx-os=6.0\(2\)u6\(10\)
Cisco Nx-os=6.0\(2\)u6\(10a\)
Cisco Nx-os=7.0\(3\)f3\(1\)
Cisco Nx-os=7.0\(3\)f3\(2\)
Cisco Nx-os=7.0\(3\)f3\(3\)
Cisco Nx-os=7.0\(3\)f3\(3a\)
Cisco Nx-os=7.0\(3\)f3\(3c\)
Cisco Nx-os=7.0\(3\)f3\(4\)
Cisco Nx-os=7.0\(3\)f3\(5\)
Cisco Nx-os=7.0\(3\)i2\(1\)
Cisco Nx-os=7.0\(3\)i2\(1a\)
Cisco Nx-os=7.0\(3\)i2\(2\)
Cisco Nx-os=7.0\(3\)i2\(2a\)
Cisco Nx-os=7.0\(3\)i2\(2b\)
Cisco Nx-os=7.0\(3\)i2\(2c\)
Cisco Nx-os=7.0\(3\)i2\(2d\)
Cisco Nx-os=7.0\(3\)i2\(2e\)
Cisco Nx-os=7.0\(3\)i2\(2r\)
Cisco Nx-os=7.0\(3\)i2\(2s\)
Cisco Nx-os=7.0\(3\)i2\(2v\)
Cisco Nx-os=7.0\(3\)i2\(2w\)
Cisco Nx-os=7.0\(3\)i2\(2x\)
Cisco Nx-os=7.0\(3\)i2\(2y\)
Cisco Nx-os=7.0\(3\)i2\(3\)
Cisco Nx-os=7.0\(3\)i2\(4\)
Cisco Nx-os=7.0\(3\)i2\(5\)
Cisco Nx-os=7.0\(3\)i3\(1\)
Cisco Nx-os=7.0\(3\)i4\(1\)
Cisco Nx-os=7.0\(3\)i4\(1t\)
Cisco Nx-os=7.0\(3\)i4\(2\)
Cisco Nx-os=7.0\(3\)i4\(3\)
Cisco Nx-os=7.0\(3\)i4\(4\)
Cisco Nx-os=7.0\(3\)i4\(5\)
Cisco Nx-os=7.0\(3\)i4\(6\)
Cisco Nx-os=7.0\(3\)i4\(6t\)
Cisco Nx-os=7.0\(3\)i4\(7\)
Cisco Nx-os=7.0\(3\)i4\(8\)
Cisco Nx-os=7.0\(3\)i4\(8a\)
Cisco Nx-os=7.0\(3\)i4\(8b\)
Cisco Nx-os=7.0\(3\)i4\(8z\)
Cisco Nx-os=7.0\(3\)i4\(9\)
Cisco Nx-os=7.0\(3\)i5\(1\)
Cisco Nx-os=7.0\(3\)i5\(2\)
Cisco Nx-os=7.0\(3\)i5\(3\)
Cisco Nx-os=7.0\(3\)i5\(3a\)
Cisco Nx-os=7.0\(3\)i5\(3b\)
Cisco Nx-os=7.0\(3\)i6\(1\)
Cisco Nx-os=7.0\(3\)i6\(2\)
Cisco Nx-os=7.0\(3\)i7\(1\)
Cisco Nx-os=7.0\(3\)i7\(2\)
Cisco Nx-os=7.0\(3\)i7\(3\)
Cisco Nx-os=7.0\(3\)i7\(3z\)
Cisco Nx-os=7.0\(3\)i7\(4\)
Cisco Nx-os=7.0\(3\)i7\(5\)
Cisco Nx-os=7.0\(3\)i7\(5a\)
Cisco Nx-os=7.0\(3\)i7\(6\)
Cisco Nx-os=7.0\(3\)i7\(6z\)
Cisco Nx-os=7.0\(3\)i7\(7\)
Cisco Nx-os=7.0\(3\)i7\(8\)
Cisco Nx-os=7.0\(3\)ic4\(4\)
Cisco Nx-os=7.0\(3\)im7\(2\)
Cisco Nexus 3016
Cisco Nexus 3016q
Cisco Nexus 3048
Cisco Nexus 3064
Cisco Nexus 3064-32t
Cisco Nexus 3064-t
Cisco Nexus 3064-x
Cisco Nexus 3064t
Cisco Nexus 3064x
Cisco Nexus 3100-v
Cisco Nexus 3100-z
Cisco Nexus 3100v
Cisco Nexus 31108pc-v
Cisco Nexus 31108pv-v
Cisco Nexus 31108tc-v
Cisco Nexus 31128pq
Cisco Nexus 3132c-z
Cisco Nexus 3132q
Cisco Nexus 3132q-v
Cisco Nexus 3132q-x
Cisco Nexus 3132q-xl
Cisco Nexus 3164q
Cisco Nexus 3172
Cisco Nexus 3172pq
Cisco Nexus 3172pq-xl
Cisco Nexus 3172tq
Cisco Nexus 3172tq-32t
Cisco Nexus 3172tq-xl
Cisco Nexus 3232c
Cisco Nexus 3264c-e
Cisco Nexus 3264q
Cisco Nexus 3408-s
Cisco Nexus 34180yc
Cisco Nexus 34200yc-sm
Cisco Nexus 3432d-s
Cisco Nexus 3464c
Cisco Nexus 3524
Cisco Nexus 3524-x
Cisco Nexus 3524-xl
Cisco Nexus 3548
Cisco Nexus 3548-x
Cisco Nexus 3548-xl
Cisco Nexus 36180yc-r
Cisco Nexus 3636c-r
Cisco Nexus 6001
Cisco Nexus 6001p
Cisco Nexus 6001t
Cisco Nexus 6004
Cisco Nexus 6004x
Cisco Nx-os=7.2\(0\)d1\(1\)
Cisco Nx-os=7.2\(1\)d1\(1\)
Cisco Nx-os=7.2\(2\)d1\(1\)
Cisco Nx-os=7.2\(2\)d1\(2\)
Cisco Nx-os=7.2\(2\)d1\(3\)
Cisco Nx-os=7.2\(2\)d1\(4\)
Cisco Nx-os=7.3\(0\)d1\(1\)
Cisco Nx-os=7.3\(0\)dx\(1\)
Cisco Nx-os=7.3\(1\)d1\(1\)
Cisco Nx-os=7.3\(2\)d1\(1\)
Cisco Nx-os=7.3\(2\)d1\(1d\)
Cisco Nx-os=7.3\(2\)d1\(2\)
Cisco Nx-os=7.3\(2\)d1\(3\)
Cisco Nx-os=7.3\(2\)d1\(3a\)
Cisco Nx-os=7.3\(3\)d1\(1\)
Cisco Nx-os=7.3\(4\)d1\(1\)
Cisco Nx-os=7.3\(5\)d1\(1\)
Cisco Nx-os=7.3\(6\)d1\(1\)
Cisco Nx-os=8.0\(1\)
Cisco Nx-os=8.1\(1\)
Cisco Nx-os=8.1\(2\)
Cisco Nx-os=8.1\(2a\)
Cisco Nx-os=8.2\(1\)
Cisco Nx-os=8.2\(2\)
Cisco Nx-os=8.2\(3\)
Cisco Nx-os=8.2\(4\)
Cisco Nx-os=8.2\(5\)
Cisco Nx-os=8.3\(1\)
Cisco Nx-os=8.3\(2\)
Cisco Nx-os=8.4\(1\)
Cisco Nx-os=8.4\(2\)
Cisco Nexus 7000
Cisco Nexus 7004
Cisco Nexus 7009
Cisco Nexus 7010
Cisco Nexus 7018
Cisco Nexus 7700
Cisco Nexus 7702
Cisco Nexus 7706
Cisco Nexus 7710
Cisco Nexus 7718
Cisco Nx-os=7.0\(3\)f1\(1\)
Cisco Nx-os=7.0\(3\)f2\(1\)
Cisco Nx-os=7.0\(3\)f2\(2\)
Cisco Nx-os=7.0\(3\)ia7\(1\)
Cisco Nx-os=7.0\(3\)ia7\(2\)
Cisco Nx-os=7.0\(3\)im3\(1\)
Cisco Nx-os=7.0\(3\)im3\(2\)
Cisco Nx-os=7.0\(3\)im3\(2a\)
Cisco Nx-os=7.0\(3\)im3\(2b\)
Cisco Nx-os=7.0\(3\)im3\(3\)
Cisco Nexus 9000v
Cisco Nexus 92160yc-x
Cisco Nexus 92160yc Switch
Cisco Nexus 9221c
Cisco Nexus 92300yc
Cisco Nexus 92304qc
Cisco Nexus 92348gc-x
Cisco Nexus 9236c
Cisco Nexus 9272q
Cisco Nexus 93108tc-ex
Cisco Nexus 93108tc-ex-24
Cisco Nexus 93108tc-fx
Cisco Nexus 93108tc-fx-24
Cisco Nexus 93108tc-fx3p
Cisco Nexus 93120tx
Cisco Nexus 93128
Cisco Nexus 93128tx
Cisco Nexus 9316d-gx
Cisco Nexus 93180lc-ex
Cisco Nexus 93180tc-ex
Cisco Nexus 93180yc-ex
Cisco Nexus 93180yc-ex-24
Cisco Nexus 93180yc-fx
Cisco Nexus 93180yc-fx-24
Cisco Nexus 93180yc-fx3
Cisco Nexus 93180yc-fx3s
Cisco Nexus 93216tc-fx2
Cisco Nexus 93240yc-fx2
Cisco Nexus 9332c
Cisco Nexus 9332pq
Cisco Nexus 93360yc-fx2
Cisco Nexus 9336c-fx2
Cisco Nexus 9336c-fx2-e
Cisco Nexus 9336pq
Cisco Nexus 9348gc-fxp
Cisco Nexus 93600cd-gx
Cisco Nexus 9364c
Cisco Nexus 9364c-gx
Cisco Nexus 9372px
Cisco Nexus 9372px-e
Cisco Nexus 9372tx
Cisco Nexus 9372tx-e
Cisco Nexus 9396px
Cisco Nexus 9396tx
Cisco Nexus 9500r
Cisco Nexus 9504
Cisco Nexus 9508
Cisco Nexus 9516

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