What is CVE-2024-20267?

CVE-2024-20267 is a high-severity vulnerability in Cisco Nx-Os Software, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.6/10. Published 2024-02-29.

How severe is CVE-2024-20267?

High severity. CVSS v3 base score is 8.6 out of 10.

Buffer overflow in Cisco Nx-Os Software

CVE-2024-20267

A vulnerability with the handling of MPLS traffic for Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause the netstack process to unexpectedly restart, which could cause the device to stop processing network traffic or to reload. This vulnerability is due to lack of proper error checking when processing an ingress MPLS frame. An attacker could exploit this vulnerability by sending a crafted IPv6 packet that is encapsulated within an MPLS frame to an MPLS-enabled interface of the targeted device. A successful exploit could allow the attacker to cause a denial of service (DoS) condition. Note: The IPv6 packet can be generated multiple hops away from the targeted device and then encapsulated within MPLS. The DoS condition may occur when the NX-OS device processes the packet.

Vulnerability class: Buffer Overflow

EPSS: 0.009 (58.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.

Affected products

Cisco Nx-os Software — versions 6.0(2)A3(1), 6.0(2)A3(2), 6.0(2)A3(4)
Cisco Nx-os — versions 6.0(2)a8(5), 7.0\(3\)i4\(4\), 10.2(2)

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

psirt@cisco.com (Vendor Advisory)

Frequently asked questions

What is CVE-2024-20267?: CVE-2024-20267 is a high-severity vulnerability in Cisco Nx-Os Software, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.6/10. Published 2024-02-29.
How severe is CVE-2024-20267?: High severity. CVSS v3 base score is 8.6 out of 10.