EN

CVE-2024-20319

Medium
4.3
0.05.010.0
Year
2024
Published
Mar 13, 2024
Known Affected Devices
0
CVSS Score
4.3

What is CVE-2024-20319?

A vulnerability in the UDP forwarding code of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to bypass configured management plane protection policies and access the Simple Network Management Plane (SNMP) server of an affected device. This vulnerability is due to incorrect UDP forwarding programming when using SNMP with management plane protection. An attacker could exploit this vulnerability by attempting to perform an SNMP operation using broadcast as the destination address that could be processed by an affected device that is configured with an SNMP server. A successful exploit could allow the attacker to communicate to the device on the configured SNMP ports. Although an unauthenticated attacker could send UDP datagrams to the configured SNMP port, only an authenticated user can retrieve or modify data using SNMP requests.

CVSS Vector Breakdown

CVSS 3.1
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
AV
Attack Vector
Adjacent

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

AC
Attack Complexity
Low

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

PR
Privileges Required
None

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

UI
User Interaction
None

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

S
Scope
Unchanged

Exploiting the vulnerability only affects the vulnerable component itself.

C
Confidentiality Impact
None

No confidentiality impact. Sensitive data is not exposed.

I
Integrity Impact
Low

Attacker can modify some data, but scope or consequence is limited.

A
Availability Impact
None

No availability impact. Service remains fully operational.

Known Affected Devices

Cisco Cisco ASR 1009-X Cisco Cisco Catalyst 9200-48T Cisco Cisco Catalyst 9300L-24T-4G Cisco Cisco Catalyst 9407R Cisco Cisco Catalyst 9600-40YC Cisco Cisco ASA 5508-X Cisco Cisco ASA 5512-X Cisco Cisco ASA 5515-X Cisco Cisco ASA 5545-X Cisco Cisco ASA 5585-X SSP-40 Cisco Cisco ASA 5585-X SSP-60 Cisco Cisco Firepower 2120 Cisco Cisco Firepower 4140 Cisco Cisco Firepower 4150 Cisco Cisco Catalyst 9800-L-C Cisco Cisco Meraki MS390-24

FAQ

How severe is CVE-2024-20319?

CVE-2024-20319 has a CVSS score of 4.3/10, rated as Medium. Review the affected products list and apply vendor patches.

What does the CVSS score mean for CVE-2024-20319?

CVSS (Common Vulnerability Scoring System) rates vulnerability severity from 0.0 to 10.0. CVE-2024-20319 scores 4.3/10 (Medium). 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-2024-20319?

The list of devices confirmed to be affected by CVE-2024-20319 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-2024-20319?

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.