CRITICAL · 9.8

CVE-2021-1361

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 N...

Vulnerability Description

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.

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
CiscoNx-Os9.3\(5\)
CiscoNexus 3000-
CiscoNexus 3100-
CiscoNexus 3100-Z-
CiscoNexus 3100V-
CiscoNexus 3200-
CiscoNexus 3400-
CiscoNexus 3500-
CiscoNexus 3600-
CiscoNexus 9000V-
CiscoNexus 92160Yc-X-
CiscoNexus 92300Yc-
CiscoNexus 92304Qc-
CiscoNexus 92348Gc-X-
CiscoNexus 9236C-
CiscoNexus 9272Q-
CiscoNexus 93108Tc-Ex-
CiscoNexus 93108Tc-Ex-24-
CiscoNexus 93108Tc-Fx-
CiscoNexus 93108Tc-Fx-24-

Related Weaknesses (CWE)

References

FAQ

What is CVE-2021-1361?

CVE-2021-1361 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 N...

How severe is CVE-2021-1361?

CVE-2021-1361 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2021-1361?

Check the references section above for vendor advisories and patch information. Affected products include: Cisco Nx-Os, Cisco Nexus 3000, Cisco Nexus 3100, Cisco Nexus 3100-Z, Cisco Nexus 3100V.