CVE-2024-20317

High

7.4

0.05.010.0

Year

2024

Published

Sep 11, 2024

Known Affected Devices

CVSS Score

7.4

What is CVE-2024-20317?

A vulnerability in the handling of specific Ethernet frames by Cisco IOS XR Software for various Cisco Network Convergence System (NCS) platforms could allow an unauthenticated, adjacent attacker to cause critical priority packets to be dropped, resulting in a denial of service (DoS) condition. This vulnerability is due to incorrect classification of certain types of Ethernet frames that are received on an interface. An attacker could exploit this vulnerability by sending specific types of Ethernet frames to or through the affected device. A successful exploit could allow the attacker to cause control plane protocol relationships to fail, resulting in a DoS condition. For more information, see the section of this advisory. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

CVSS Vector Breakdown

CVSS 3.1

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Attack Vector

Adjacent

Exploitable from an adjacent network (e.g. same LAN, Wi-Fi segment, Bluetooth).

Attack Complexity

Low

No special conditions required. Exploit can be performed reliably and repeatedly.

Privileges Required

None

No authentication required. Any anonymous user can exploit this vulnerability.

User Interaction

None

No user interaction required. Exploit runs without any victim action.

Scope

Changed

Exploiting the vulnerability can affect other components beyond the vulnerable one.

Confidentiality Impact

None

No confidentiality impact. Sensitive data is not exposed.

Integrity Impact

None

No integrity impact. Data cannot be modified.

Availability Impact

High

Complete denial of service. The component becomes fully unavailable.

Known Affected Devices

Cisco Cisco ASR 1001-X Cisco Cisco Catalyst 2960X-24TS-L Cisco Cisco Catalyst 2960X-48FPS-L Cisco Cisco Catalyst 3650-48TS-L Cisco Cisco Catalyst 3750X-24P-S Cisco Cisco Catalyst 9200-24P Cisco Cisco Catalyst 9200-48T Cisco Cisco Catalyst 9200L-24P-4G Cisco Cisco Catalyst 9300-48P Cisco Cisco Catalyst 9300-48T Cisco Cisco Catalyst 9300L-24T-4G Cisco Cisco Catalyst 9407R Cisco Cisco Nexus 7018 Cisco Cisco Nexus 9364C Cisco Cisco ASA 5508-X Cisco Cisco ASA 5515-X Cisco Cisco ASA 5545-X Cisco Cisco Firepower 2110 Cisco Cisco Catalyst 9800-L-C Cisco Cisco Meraki MS390-24

FAQ

How severe is CVE-2024-20317?

CVE-2024-20317 has a CVSS score of 7.4/10, rated as High. This is a high severity vulnerability and should be patched as soon as possible.

What does the CVSS score mean for CVE-2024-20317?

CVSS (Common Vulnerability Scoring System) rates vulnerability severity from 0.0 to 10.0. CVE-2024-20317 scores 7.4/10 (High). Scores 9.0–10.0 are Critical, 7.0–8.9 are High, 4.0–6.9 are Medium, and below 4.0 are Low.

Which devices are affected by CVE-2024-20317?

The list of devices confirmed to be affected by CVE-2024-20317 is shown in the "Affected Devices" section above. Check your firmware version against the vendor security advisory and apply the latest patch.

How do I fix or mitigate CVE-2024-20317?

Apply the latest firmware or software update from the vendor. Check the References section above for official advisories and patch notes. If no patch is available, consider disabling the affected feature or isolating the device from untrusted networks.