CVE-2021-1587
First published: Wed Aug 25 2021(Updated: )
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.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Nx-os | ||
| Cisco Nexus 3000 | ||
| Cisco Nexus 3048 | ||
| Cisco Nexus 31108pc-v | ||
| Cisco Nexus 31108tc-v | ||
| Cisco Nexus 31128pq | ||
| Cisco Nexus 3132c-z | ||
| Cisco Nexus 3132q-v | ||
| Cisco Nexus 3132q-x\/3132q-xl | ||
| Cisco Nexus 3164q | ||
| Cisco Nexus 3172pq\/pq-xl | ||
| Cisco Nexus 3172tq-xl | ||
| Cisco Nexus 3232c | ||
| Cisco Nexus 3264c-e | ||
| Cisco Nexus 3264q | ||
| Cisco Nexus 3408-s | ||
| Cisco Nexus 34180yc | ||
| Cisco Nexus 3432d-s | ||
| Cisco Nexus 3464c | ||
| Cisco Nexus 3524-x\/xl | ||
| Cisco Nexus 3548-x\/xl | ||
| Cisco Nexus 36180yc-r | ||
| Cisco Nexus 3636c-r | ||
| Cisco Nexus 9000v | ||
| Cisco Nexus 92160yc-x | ||
| 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 93128tx | ||
| Cisco Nexus 9316d-gx | ||
| Cisco Nexus 93180lc-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 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 9508 |
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Reference Links
Frequently Asked Questions
What is CVE-2021-1587?
CVE-2021-1587 is a vulnerability in the VXLAN Operation, Administration, and Maintenance (OAM) feature of Cisco NX-OS Software that could allow an unauthenticated remote attacker to cause a denial of service (DoS) condition on an affected device.
What is the severity of CVE-2021-1587?
CVE-2021-1587 has a severity rating of 8.6, which is considered high.
Which devices are affected by CVE-2021-1587?
Cisco Nexus devices running Cisco NX-OS Software are affected by CVE-2021-1587.
How can an attacker exploit CVE-2021-1587?
An attacker can exploit CVE-2021-1587 by sending specially crafted packets to a vulnerable device.
Is there a fix for CVE-2021-1587?
Yes, Cisco has released software updates to address the vulnerability. It is recommended to apply the necessary updates as soon as possible.
- collector/nvd-index
- vendor/cisco
- canonical/cisco nx-os
- canonical/cisco nexus 3000
- canonical/cisco nexus 3048
- canonical/cisco nexus 31108pc-v
- canonical/cisco nexus 31108tc-v
- canonical/cisco nexus 31128pq
- canonical/cisco nexus 3132c-z
- canonical/cisco nexus 3132q-v
- canonical/cisco nexus 3132q-x\/3132q-xl
- canonical/cisco nexus 3164q
- canonical/cisco nexus 3172pq\/pq-xl
- canonical/cisco nexus 3172tq-xl
- canonical/cisco nexus 3232c
- canonical/cisco nexus 3264c-e
- canonical/cisco nexus 3264q
- canonical/cisco nexus 3408-s
- canonical/cisco nexus 34180yc
- canonical/cisco nexus 3432d-s
- canonical/cisco nexus 3464c
- canonical/cisco nexus 3524-x\/xl
- canonical/cisco nexus 3548-x\/xl
- canonical/cisco nexus 36180yc-r
- canonical/cisco nexus 3636c-r
- canonical/cisco nexus 9000v
- canonical/cisco nexus 92160yc-x
- canonical/cisco nexus 92300yc
- canonical/cisco nexus 92304qc
- canonical/cisco nexus 92348gc-x
- canonical/cisco nexus 9236c
- canonical/cisco nexus 9272q
- canonical/cisco nexus 93108tc-ex
- canonical/cisco nexus 93108tc-ex-24
- canonical/cisco nexus 93108tc-fx
- canonical/cisco nexus 93108tc-fx-24
- canonical/cisco nexus 93108tc-fx3p
- canonical/cisco nexus 93120tx
- canonical/cisco nexus 93128tx
- canonical/cisco nexus 9316d-gx
- canonical/cisco nexus 93180lc-ex
- canonical/cisco nexus 93180yc-ex
- canonical/cisco nexus 93180yc-ex-24
- canonical/cisco nexus 93180yc-fx
- canonical/cisco nexus 93180yc-fx-24
- canonical/cisco nexus 93180yc-fx3
- canonical/cisco nexus 93180yc-fx3s
- canonical/cisco nexus 93216tc-fx2
- canonical/cisco nexus 93240yc-fx2
- canonical/cisco nexus 9332c
- canonical/cisco nexus 9332pq
- canonical/cisco nexus 93360yc-fx2
- canonical/cisco nexus 9336c-fx2
- canonical/cisco nexus 9336c-fx2-e
- canonical/cisco nexus 9348gc-fxp
- canonical/cisco nexus 93600cd-gx
- canonical/cisco nexus 9364c
- canonical/cisco nexus 9364c-gx
- canonical/cisco nexus 9372px
- canonical/cisco nexus 9372px-e
- canonical/cisco nexus 9372tx
- canonical/cisco nexus 9372tx-e
- canonical/cisco nexus 9396px
- canonical/cisco nexus 9396tx
- canonical/cisco nexus 9508