CVE-2018-0173

Basic Information

CVE State

PUBLISHED

Reserved Date

November 27, 2017

Published Date

March 28, 2018

Last Updated

November 13, 2024

Vendor

n/a

Product

Cisco IOS and IOS XE

Description

A vulnerability in the Cisco IOS Software and Cisco IOS XE Software function that restores encapsulated option 82 information in DHCP Version 4 (DHCPv4) packets could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a Relay Reply denial of service (DoS) condition. The vulnerability exists because the affected software performs incomplete input validation of encapsulated option 82 information that it receives in DHCPOFFER messages from DHCPv4 servers. An attacker could exploit this vulnerability by sending a crafted DHCPv4 packet to an affected device, which the device would then forward to a DHCPv4 server. When the affected software processes the option 82 information that is encapsulated in the response from the server, an error could occur. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Cisco Bug IDs: CSCvg62754.

CVSS Scores

SSVC Information

Exploitation

active

Technical Impact

total

Exploit Status

Exploited in the Wild

Yes (added 2022-03-03 00:00:00 UTC) Source