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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.
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CVE Modified by Cisco Systems, Inc.5/14/2024 10:50:56 AM
Action
Type
Old Value
New Value
New CVE Received from Cisco Systems, Inc.3/13/2024 1:15:48 PM
Action
Type
Old Value
New Value
Added
Description
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.
Added
CVSS V3.1
Cisco Systems, Inc. AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Added
CWE
Cisco Systems, Inc. CWE-284
Added
Reference
Cisco Systems, Inc. https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snmp-uhv6ZDeF [No types assigned]
Quick Info
CVE Dictionary Entry: CVE-2024-20319 NVD
Published Date: 03/13/2024 NVD
Last Modified: 07/07/2025
Source: Cisco Systems, Inc.