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HIGH · 8.6

CVE-2021-1588

A vulnerability in the MPLS Operation, Administration, and Maintenance (OAM) feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) conditio...

Vulnerability Description

A vulnerability in the MPLS Operation, Administration, and Maintenance (OAM) feature 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 is due to improper input validation when an affected device is processing an MPLS echo-request or echo-reply packet. An attacker could exploit this vulnerability by sending malicious MPLS echo-request or echo-reply packets to an interface that is enabled for MPLS forwarding on the affected device. A successful exploit could allow the attacker to cause the MPLS OAM process to crash and restart multiple times, causing the affected device to reload and resulting in a DoS condition.

CVSS Score

8.6

HIGH

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

Affected Products

VendorProductVersions
CiscoNx-Os7.0\(3\)i7\(9\)
CiscoNexus 3000-
CiscoNexus 3048-
CiscoNexus 31108Pc-V-
CiscoNexus 31108Tc-V-
CiscoNexus 31128Pq-
CiscoNexus 3132C-Z-
CiscoNexus 3132Q-V-
CiscoNexus 3132Q-X\/3132Q-Xl-
CiscoNexus 3164Q-
CiscoNexus 3172Pq\/Pq-Xl-
CiscoNexus 3172Tq-Xl-
CiscoNexus 3232C-
CiscoNexus 3264C-E-
CiscoNexus 3264Q-
CiscoNexus 3408-S-
CiscoNexus 34180Yc-
CiscoNexus 3432D-S-
CiscoNexus 3464C-
CiscoNexus 3524-X\/Xl-

Related Weaknesses (CWE)

CWE-20CWE-126CWE-125

References

FAQ

What is CVE-2021-1588?

CVE-2021-1588 is a vulnerability with a CVSS score of 8.6 (HIGH). A vulnerability in the MPLS Operation, Administration, and Maintenance (OAM) feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) conditio...

How severe is CVE-2021-1588?

CVE-2021-1588 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-1588?

Check the references section above for vendor advisories and patch information. Affected products include: Cisco Nx-Os, Cisco Nexus 3000, Cisco Nexus 3048, Cisco Nexus 31108Pc-V, Cisco Nexus 31108Tc-V.