CVE-2018-0174Cisco IOS Software and Cisco IOS XE Software Improper Input Validation Vulnerability
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.
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 8.6 | HIGH | 3.1NVD | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H |
| 7.8 | HIGH | 2.0NVD | AV:N/AC:L/Au:N/C:N/I:N/A:C |
CISA required action
⚡ Known exploited · remediation due Mar 17, 2022
Apply updates per vendor instructions.
Details
- CVE ID
- CVE-2018-0174
- Status
- Analyzed
- Assigner (CNA)
- cisco
- Published
- Mar 28, 2018
- Last modified
- 2026-06-17 01:30 UTC
- Weaknesses
Affected Products
As published by the CNA in the CVE record.
Cisco IOS and IOS XE1 version range
- Cisco IOS and IOS XE
References
- securityfocus.com http://www.securityfocus.com/bid/103554
- securitytracker.com http://www.securitytracker.com/id/1040591
- ics-cert.us-cert.gov https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04
- ics-cert.us-cert.gov https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05
- tools.cisco.com https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-dhcpr3
- tenable.com https://www.tenable.com/security/research/tra-2018-06
- cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0174