CVE-2018-0174
Description
A vulnerability in the DHCP option 82 encapsulation functionality of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability exists because the affected software performs incomplete input validation of option 82 information that it receives in DHCP Version 4 (DHCPv4) packets from DHCP relay agents. An attacker could exploit this vulnerability by sending a crafted DHCPv4 packet to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Cisco Bug IDs: CSCuh91645.
How to fix
Apply updates per vendor instructions.
CISA due date: Mar 17, 2022Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| cisco ios | 12.2\(33\)sre7a, v ≤ 15.2\(4a\)ea5, v ≤ 15.2\(6\)e0a | — |
| cisco ios_xe | 12.2\(33\)sre7a, v ≤ 15.2\(4a\)ea5, v ≤ 15.2\(6\)e0a | — |
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