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 a heap overflow condition on the affected device, which will cause the device to reload and result in a DoS condition. Cisco Bug IDs: CSCvg62730.
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Status: PUBLISHED
Assigner: cisco
Published: 2018-03-28T22:00:00.000Z
Updated: 2025-10-21T23:45:53.521Z
Reserved: 2017-11-27T00:00:00.000Z
Link: CVE-2018-0172
Updated: 2024-08-05T03:14:16.874Z
Status : Modified
Published: 2018-03-28T22:29:01.110
Modified: 2025-10-22T00:16:14.687
Link: CVE-2018-0172
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