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Cisco IOS XR Software SNMP Management Plane Protection ACL Bypass (cisco-sa-snmp-uhv6ZDeF)

medium Nessus Plugin ID 194889

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Synopsis

The remote device is missing a vendor-supplied security patch

Description

According to its self-reported version, Cisco IOS XR is affected by a vulnerability.

 - 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. (CVE-2024-20319)

Please see the included Cisco BIDs and Cisco Security Advisory for more information.

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCwh31469

See Also

http://www.nessus.org/u?57a27675

http://www.nessus.org/u?3206828a

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwh31469

Plugin Details

Severity: Medium

ID: 194889

File Name: cisco-sa-snmp-uhv6ZDeF-iosxr.nasl

Version: 1.1

Type: combined

Family: CISCO

Published: 5/1/2024

Updated: 9/13/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.4

CVSS v2

Risk Factor: Low

Base Score: 3.3

Temporal Score: 2.4

Vector: CVSS2#AV:A/AC:L/Au:N/C:N/I:P/A:N

CVSS Score Source: CVE-2024-20319

CVSS v3

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.8

Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:cisco:ios_xr

Required KB Items: Host/Cisco/IOS-XR/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 3/13/2024

Vulnerability Publication Date: 3/13/2024

Reference Information

CVE: CVE-2024-20319

CWE: 284

CISCO-SA: cisco-sa-snmp-uhv6ZDeF

IAVA: 2024-A-0169-S

CISCO-BUG-ID: CSCwh31469