QID 317221

Date Published: 2022-09-22

QID 317221: Cisco Internetwork Operating System (IOS) XR Software Cisco Discovery Protocol Denial of Service (DoS) Vulnerability (cisco-sa-xr-cdp-wnALzvT2)

A vulnerability in the Cisco Discovery Protocol implementation for Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause the Cisco Discovery Protocol process to reload on an affected device.

Affected Products
From 5.2.2 and later and prior to Cisco IOS XR Software version 7.5.2
Prior to Cisco IOS XR Software version 7.6.2
Prior to Cisco IOS XR Software version 7.7.1

QID Detection Logic (Authenticated):
The check matches Cisco IOS XR version retrieved via Unix Auth using "show version" command Along with it checks if Cisco Discovery Protocol is enabled.

A successful exploit could allow the attacker to cause a heap overflow, which could cause the Cisco Discovery Protocol process to reload on the device.

  • 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-xr-cdp-wnALzvT2 for more information.

    Vendor References

    CVEs related to QID 317221

    CVE-2022-20846 |
    Software Advisories
    Advisory ID Software Component Link
    cisco-sa-xr-cdp-wnALzvT2 URL Logo tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xr-cdp-wnALzvT2
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