QID 317422

Date Published: 2024-03-19

QID 317422: Cisco Internetwork Operating System (IOS) XR Software SNMP Management Plane Protection ACL Bypass Vulnerability (cisco-sa-snmp-uhv6ZDeF)

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.

Affected Products
Cisco IOS XR Software Release v7.11 and earlier
Cisco IOS XR Software Release v24.1 prior to v24.1.1
This vulnerability affected Cisco devices if they were running a vulnerable release of Cisco IOS XR Software and had management plane protection configured with the SNMP server enabled.

QID Detection Logic (Authenticated):
The check matches Cisco IOS XR version retrieved via Unix Auth using "show version" command.

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 V3 rated as Medium - 4.3 severity.
  • CVSS V2 rated as Medium - 3.3 severity.
    • Solution

    Customers are advised to refer to cisco-sa-snmp-uhv6ZDeF for more information.
    Workaround:
    The vendor has advised to "Disable UDP forwarding" if udp is not required.

    Vendor References

    CVEs related to QID 317422

    CVE-2024-20319 |
    Software Advisories
    Advisory ID Software Component Link
    cisco-sa-snmp-uhv6ZDeF URL Logo sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snmp-uhv6ZDeF
    By selecting these links, you may be leaving CVEreport webspace. We have provided these links to other websites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other websites that are more appropriate for your purpose. CVEreport does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, CVEreport does not endorse any commercial products that may be mentioned on these sites. Please address comments about any linked pages to [email protected].

    © CVE.report 2026

    Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

    CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

    Free CVE JSON API cve.report/api

    CVE.report and Source URL Uptime Status status.cve.report