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Cisco NX-OS Software IPv6 Netstack Denial of Service Vulnerability

cisco-sa-nxos-ipv6-netstack-edXPGV7K · High · Published · 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. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-ipv6-netstack-edXPGV7K This advisory is part of the February 2021 Cisco FXOS and NX-OS Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: February 2021 Cisco FXOS and NX-OS Software Security Advisory Bundled Publication.

Cisco advisory ·CSAF JSON

Workarounds

There are no workarounds that address this vulnerability.

CVEsCVE-2021-1387
Cisco Bug IDsCSCvu77380, CSCvu11961
CVSS ScoreBase 8.6
Base 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:X/RL:X/RC:X
Product Names From Source
Cisco Unified Computing System (Managed), Cisco NX-OS Software 6.0(2)A8(1), Cisco NX-OS Software 6.0(2)A8(2), Cisco NX-OS Software 6.0(2)A8(3), Cisco NX-OS Software 6.0(2)A8(4), Cisco NX-OS Software 6.0(2)A8(4a), Cisco NX-OS Software 6.0(2)A8(5), Cisco NX-OS Software 6.0(2)A8(6), Cisco NX-OS Software 6.0(2)A8(7), Cisco NX-OS Software 6.0(2)A8(7a), Cisco NX-OS Software 6.0(2)A8(7b), Cisco NX-OS Software 6.0(2)A8(8), Cisco NX-OS Software 6.0(2)A8(9), Cisco NX-OS Software 6.0(2)A8(10a), Cisco NX-OS Software 6.0(2)A8(10), Cisco NX-OS Software 6.0(2)A8(11), Cisco NX-OS Software 6.0(2)A8(11a), Cisco NX-OS Software 6.0(2)A8(11b), Cisco NX-OS Software 7.0(3)F3(1), Cisco NX-OS Software 7.0(3)F3(2), Cisco NX-OS Software 7.0(3)F3(3), Cisco NX-OS Software 7.0(3)F3(3a), Cisco NX-OS Software 7.0(3)F3(4), Cisco NX-OS Software 7.0(3)F3(3c), Cisco NX-OS Software 7.0(3)F3(5), Cisco NX-OS Software 7.0(3)I4(1), Cisco NX-OS Software 7.0(3)I4(2), Cisco NX-OS Software 7.0(3)I4(3), Cisco NX-OS Software 7.0(3)I4(4), Cisco NX-OS Software 7.0(3)I4(5), Cisco NX-OS Software 7.0(3)I4(6), Cisco NX-OS Software 7.0(3)I4(7), Cisco NX-OS Software 7.0(3)I4(8), Cisco NX-OS Software 7.0(3)I4(8a), Cisco NX-OS Software 7.0(3)I4(8b), Cisco NX-OS Software 7.0(3)I4(8z), Cisco NX-OS Software 7.0(3)I4(1t), Cisco NX-OS Software 7.0(3)I4(6t), Cisco NX-OS Software 7.0(3)I4(9), Cisco NX-OS Software 7.0(3)I5(1), Cisco NX-OS Software 7.0(3)I5(2), Cisco NX-OS Software 7.0(3)I5(3), Cisco NX-OS Software 7.0(3)I5(3a), Cisco NX-OS Software 7.0(3)I5(3b), Cisco NX-OS Software 7.0(3)I6(1), Cisco NX-OS Software 7.0(3)I6(2), Cisco NX-OS Software 7.0(3)I7(1), Cisco NX-OS Software 7.0(3)I7(2), Cisco NX-OS Software 7.0(3)I7(3), Cisco NX-OS Software 7.0(3)I7(4), Cisco NX-OS Software 7.0(3)I7(5), Cisco NX-OS Software 7.0(3)I7(5a), Cisco NX-OS Software 7.0(3)I7(3z), Cisco NX-OS Software 7.0(3)I7(6), Cisco NX-OS Software 7.0(3)I7(6z), Cisco NX-OS Software 7.0(3)I7(7), Cisco NX-OS Software 7.0(3)I7(8), Cisco NX-OS Software 7.3(0)D1(1), Cisco NX-OS Software 7.3(0)DX(1), Cisco NX-OS Software 7.3(0)N1(1), Cisco NX-OS Software 7.3(0)N1(1b), Cisco NX-OS Software 7.3(0)N1(1a), Cisco NX-OS Software 7.3(1)D1(1), Cisco NX-OS Software 7.3(1)N1(1), Cisco NX-OS Software 7.3(2)D1(1), Cisco NX-OS Software 7.3(2)D1(2), Cisco NX-OS Software 7.3(2)D1(3), Cisco NX-OS Software 7.3(2)D1(3a), Cisco NX-OS Software 7.3(2)D1(1d), Cisco NX-OS Software 7.3(2)N1(1), Cisco NX-OS Software 7.3(2)N1(1b), Cisco NX-OS Software 7.3(2)N1(1c), Cisco NX-OS Software 7.3(3)N1(1), Cisco NX-OS Software 8.1(1), Cisco NX-OS Software 8.1(2), Cisco NX-OS Software 8.1(2a), Cisco NX-OS Software 8.2(1), Cisco NX-OS Software 8.2(2), Cisco NX-OS Software 8.2(3), Cisco NX-OS Software 8.2(4), Cisco NX-OS Software 8.2(5), Cisco NX-OS Software 8.3(1), Cisco NX-OS Software 8.3(2), Cisco NX-OS Software 7.3(4)N1(1), Cisco NX-OS Software 7.3(4)N1(1a), Cisco NX-OS Software 7.3(3)D1(1), Cisco NX-OS Software 7.0(3)IA7(1), Cisco NX-OS Software 7.0(3)IA7(2), Cisco NX-OS Software 7.0(3)IM7(2), Cisco NX-OS Software 7.3(4)D1(1), Cisco NX-OS Software 7.3(5)N1(1), Cisco NX-OS Software 8.4(1), Cisco NX-OS Software 8.4(2), Cisco NX-OS Software 7.3(6)N1(1), Cisco NX-OS Software 7.3(6)N1(1a), Cisco NX-OS Software 7.3(5)D1(1), Cisco NX-OS Software 7.3(7)N1(1), Cisco NX-OS Software 7.3(7)N1(1a), Cisco NX-OS Software 7.3(7)N1(1b), Cisco NX-OS Software 7.3(6)D1(1), Cisco NX-OS Software, Cisco Nexus 7000 Series Switches, Cisco Nexus 5000 Series Switches, Cisco Nexus 3000 Series Switches, Cisco Nexus 6000 Series Switches, Cisco Nexus 9000 Series Switches

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