QID 317423

Date Published: 2024-03-21

QID 317423: Cisco Internetwork Operating System (IOS) XR Software DHCP Version 4 Server Denial of Service (DoS) Vulnerability (cisco-sa-iosxr-dhcp-dos-3tgPKRdm)

IOS XR is a release train of Cisco Systems' widely deployed Internetwork Operating System (IOS).

CVE-2024-20266: A vulnerability in the DHCP version 4 (DHCPv4) server feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to trigger a crash of the dhcpd process, resulting in a denial of service (DoS) condition.

Affected Products
Cisco IOS XR version prior to 7.11.1
Cisco IOS XR version 24.1 prior to 24.1.1.

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

A successful exploit could temporarily prevent network access to clients that join the network during that period and rely on the DHCPv4 server of the affected device.

CVSS V3 rated as Medium - 5.3 severity.

CVSS V2 rated as Medium - 5 severity.

Solution

Customers are advised to refer to cisco-sa-iosxr-dhcp-dos-3tgPKRdm for more information.

Vendor References

cisco-sa-iosxr-dhcp-dos-3tgPKRdm - sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-dhcp-dos-3tgPKRdm

CVEs related to QID 317423

CVE-2024-20266 |

Software Advisories

Advisory ID	Software	Component	Link

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