CVE-2018-0174

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    CVE-2018-0174

    Published: 28 Mar 2018Last Modified: 10 Mar 2026

    Summary:

    Details: 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.

    References: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0174, , https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05, https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-dhcpr3, https://www.tenable.com/security/research/tra-2018-06, http://www.securityfocus.com/bid/103554, http://www.securitytracker.com/id/1040591, https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High