critical
9.8
CWE
552
Advisory Published
Updated

CVE-2021-1361

First published: Wed Feb 24 2021(Updated: )

A vulnerability in the implementation of an internal file management service for Cisco Nexus 3000 Series Switches and Cisco Nexus 9000 Series Switches in standalone NX-OS mode that are running Cisco NX-OS Software could allow an unauthenticated, remote attacker to create, delete, or overwrite arbitrary files with root privileges on the device. This vulnerability exists because TCP port 9075 is incorrectly configured to listen and respond to external connection requests. An attacker could exploit this vulnerability by sending crafted TCP packets to an IP address that is configured on a local interface on TCP port 9075. A successful exploit could allow the attacker to create, delete, or overwrite arbitrary files, including sensitive files that are related to the device configuration. For example, the attacker could add a user account without the device administrator knowing.

Credit: ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco Nx-os=9.3\(5\)
Cisco Nx-os=9.3\(6\)
Cisco Nexus 3000
Cisco Nexus 3100
Cisco Nexus 3100-z
Cisco Nexus 3100v
Cisco Nexus 3200
Cisco Nexus 3400
Cisco Nexus 3500
Cisco Nexus 3600
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 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 9336pq Aci Spine
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 the vulnerability ID for this Cisco Nexus switch vulnerability?

    The vulnerability ID for this Cisco Nexus switch vulnerability is CVE-2021-1361.

  • What is the severity rating of CVE-2021-1361?

    CVE-2021-1361 has a severity rating of 9.1 (critical).

  • Which Cisco Nexus switches are affected by CVE-2021-1361?

    Cisco Nexus 3000 Series Switches and Cisco Nexus 9000 Series Switches in standalone NX-OS mode are affected by CVE-2021-1361.

  • How does CVE-2021-1361 impact the affected switches?

    CVE-2021-1361 allows an unauthenticated, remote attacker to create, delete, or overwrite arbitrary files on the affected Cisco Nexus switches.

  • How can I fix the vulnerability CVE-2021-1361?

    To fix the vulnerability CVE-2021-1361, Cisco has released software updates that address the issue. Refer to the Cisco Security Advisory for more information and to download the necessary updates.

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