Vulnerability Monitor

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CVE-2021-1587

A vulnerability in the VXLAN Operation, Administration, and Maintenance (OAM) feature of Cisco NX-OS Software, known as NGOAM, could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper handling of specific packets with a Transparent Interconnection of Lots of Links (TRILL) OAM EtherType. An attacker could exploit this vulnerability by sending crafted packets, including the TRILL OAM EtherType of 0x8902, to a device that is part of a VXLAN Ethernet VPN (EVPN) fabric. A successful exploit could allow the attacker to cause an affected device to experience high CPU usage and consume excessive system resources, which may result in overall control plane instability and cause the affected device to reload. Note: The NGOAM feature is disabled by default.

Published

2021-08-25T20:15:11.417

Last Modified

2024-11-21T05:44:41.113

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 8.6 (HIGH)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:N/A:P

  • Access Vector: NETWORK
  • Access Complexity: MEDIUM
  • Authentication: NONE
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: PARTIAL
Exploitability Score

8.6

Impact Score

2.9

Weaknesses
  • Type: Secondary
    CWE-115
  • Type: Primary
    CWE-436
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System cisco nx-os - Yes
Hardware cisco nexus_3000 - No
Hardware cisco nexus_3048 - No
Hardware cisco nexus_31108pc-v - No
Hardware cisco nexus_31108tc-v - No
Hardware cisco nexus_31128pq - No
Hardware cisco nexus_3132c-z - No
Hardware cisco nexus_3132q-v - No
Hardware cisco nexus_3132q-x\/3132q-xl - No
Hardware cisco nexus_3164q - No
Hardware cisco nexus_3172pq\/pq-xl - No
Hardware cisco nexus_3172tq-xl - No
Hardware cisco nexus_3232c - No
Hardware cisco nexus_3264c-e - No
Hardware cisco nexus_3264q - No
Hardware cisco nexus_3408-s - No
Hardware cisco nexus_34180yc - No
Hardware cisco nexus_3432d-s - No
Hardware cisco nexus_3464c - No
Hardware cisco nexus_3524-x\/xl - No
Hardware cisco nexus_3548-x\/xl - No
Hardware cisco nexus_36180yc-r - No
Hardware cisco nexus_3636c-r - No
Hardware cisco nexus_9000v - No
Hardware cisco nexus_92160yc-x - No
Hardware cisco nexus_92300yc - No
Hardware cisco nexus_92304qc - No
Hardware cisco nexus_92348gc-x - No
Hardware cisco nexus_9236c - No
Hardware cisco nexus_9272q - No
Hardware cisco nexus_93108tc-ex - No
Hardware cisco nexus_93108tc-ex-24 - No
Hardware cisco nexus_93108tc-fx - No
Hardware cisco nexus_93108tc-fx-24 - No
Hardware cisco nexus_93108tc-fx3p - No
Hardware cisco nexus_93120tx - No
Hardware cisco nexus_93128tx - No
Hardware cisco nexus_9316d-gx - No
Hardware cisco nexus_93180lc-ex - No
Hardware cisco nexus_93180yc-ex - No
Hardware cisco nexus_93180yc-ex-24 - No
Hardware cisco nexus_93180yc-fx - No
Hardware cisco nexus_93180yc-fx-24 - No
Hardware cisco nexus_93180yc-fx3 - No
Hardware cisco nexus_93180yc-fx3s - No
Hardware cisco nexus_93216tc-fx2 - No
Hardware cisco nexus_93240yc-fx2 - No
Hardware cisco nexus_9332c - No
Hardware cisco nexus_9332pq - No
Hardware cisco nexus_93360yc-fx2 - No
Hardware cisco nexus_9336c-fx2 - No
Hardware cisco nexus_9336c-fx2-e - No
Hardware cisco nexus_9348gc-fxp - No
Hardware cisco nexus_93600cd-gx - No
Hardware cisco nexus_9364c - No
Hardware cisco nexus_9364c-gx - No
Hardware cisco nexus_9372px - No
Hardware cisco nexus_9372px-e - No
Hardware cisco nexus_9372tx - No
Hardware cisco nexus_9372tx-e - No
Hardware cisco nexus_9396px - No
Hardware cisco nexus_9396tx - No
Hardware cisco nexus_9508 - No
References