CVE-2018-0172

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.

• CWE-20
• CWE-787

• http://www.securityfocus.com/bid/103552Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1040591Third Party Advisory, VDB Entry
• https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04Third Party Advisory, US Government Resource
• https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05Third Party Advisory, US Government Resource
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-dhcpr1Vendor Advisory
• https://www.tenable.com/security/research/tra-2018-06Third Party Advisory
• http://www.securityfocus.com/bid/103552Third Party Advisory, VDB Entry
• http://www.securitytracker.com/id/1040591Third Party Advisory, VDB Entry
• https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04Third Party Advisory, US Government Resource
• https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05Third Party Advisory, US Government Resource
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-dhcpr1Vendor Advisory
• https://www.tenable.com/security/research/tra-2018-06Third Party Advisory
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0172US Government Resource

Published

Mar 28, 2018

Last Modified

Jun 17, 2026

Status

Analyzed

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